CN117532741A - Airport dry hard fiber concrete fiber blending amount automatic control system and method - Google Patents

Airport dry hard fiber concrete fiber blending amount automatic control system and method Download PDF

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Publication number
CN117532741A
CN117532741A CN202311801409.9A CN202311801409A CN117532741A CN 117532741 A CN117532741 A CN 117532741A CN 202311801409 A CN202311801409 A CN 202311801409A CN 117532741 A CN117532741 A CN 117532741A
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China
Prior art keywords
fiber
airport
dry
concrete
mixing
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CN202311801409.9A
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CN117532741B (en
Inventor
王岩
王鑫
霍二鹏
金敏
黄维
范科伟
张文秀
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China Railway Airport Construction Co ltd
China Railway Beijing Engineering Group Co Ltd
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China Railway Airport Construction Co ltd
China Railway Beijing Engineering Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
    • B28C5/402—Methods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
    • B28C5/40—Mixing specially adapted for preparing mixtures containing fibres
    • B28C5/404—Pre-treatment of fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/0007—Pretreatment of the ingredients, e.g. by heating, sorting, grading, drying, disintegrating; Preventing generation of dust
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/02—Controlling the operation of the mixing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28C7/00—Controlling the operation of apparatus for producing mixtures of clay or cement with other substances; Supplying or proportioning the ingredients for mixing clay or cement with other substances; Discharging the mixture
    • B28C7/02—Controlling the operation of the mixing
    • B28C7/022—Controlling the operation of the mixing by measuring the consistency or composition of the mixture, e.g. with supply of a missing component
    • B28C7/024—Controlling the operation of the mixing by measuring the consistency or composition of the mixture, e.g. with supply of a missing component by measuring properties of the mixture, e.g. moisture, electrical resistivity, density
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Preparation Of Clay, And Manufacture Of Mixtures Containing Clay Or Cement (AREA)

Abstract

The invention provides an automatic control system and method for the fiber mixing amount of airport dry and hard fiber concrete, which are characterized in that a fiber detection selection performance standard of the airport dry and hard fiber concrete is set, various fibers are subjected to performance detection, and synthetic fibers with fiber detection data meeting the airport performance standard are screened out; setting the synthetic fiber filament length after screening according to the fiber dispersibility data and the airport pavement slab roughening procedure data, and carrying out fixed-length and sectional treatment on the synthetic fiber after screening to obtain sectional fixed-length dry and hard fibers; the method comprises the steps of initially setting the mixing proportion between the sectional fixed-length dry hard fiber and the cement concrete, detecting the state of the initial mixing mixture, intelligently controlling the mixing process of the fiber concrete, and obtaining the initial mixing control fiber concrete mixture; and preparing the initially-arranged and controlled fiber concrete mixture into a dry hard fiber concrete mixture test block, and performing multi-type strength test verification, wherein the dry hard fiber concrete fiber mixing ratio of the airport is intelligently controlled and adjusted.

Description

Airport dry hard fiber concrete fiber blending amount automatic control system and method
Technical Field
The invention relates to the technical field of automatic control and precise detection, in particular to an automatic control system and method for the mixing amount of dry and hard fiber concrete fibers of an airport.
Background
With the update iteration of the aircraft, airport engineering construction meets the technical requirements of higher standards; the engineering quality of the airport pavement plays a decisive role in the safety of airport operation, and the pavement is mostly made of dry and hard concrete because of long-term and frequent bearing of huge load effects when an airplane takes off, lands and slides; however, the dry and hard concrete is influenced by the dry shrinkage characteristics of cement, the construction day-and-night temperature difference, health maintenance, temperature and humidity, wind speed, freezing and thawing and other factors, the pavement surface is easy to generate dry shrinkage and warm shrinkage cracks, and diseases such as surface falling, crushing, board breaking and the like are gradually generated along with the development of the cracks, so that the service life of an airport runway is influenced, and meanwhile, the operation safety of an airport is threatened; the fiber is a reinforcing material of concrete, and the application requirement of dry and hard fiber concrete is more and more urgent; the problems of various fiber types for concrete, how to detect and screen fiber types, how to process fiber filaments, how to control the mixing process of fiber concrete, how to enable the dry hard fiber concrete to be more suitable for the airport strength inspection and verification standard, remarkably improve the performance, control and adjust the mixing ratio of dry hard fiber concrete fibers of an airport and the like remain to be solved; how to control early shrinkage cracks of concrete, how to improve impact resistance and fatigue resistance of concrete, how to improve anti-freezing and thawing resistance of flexural tensile strength, how to increase service life and how to improve technical performance of dry and hard fiber concrete is yet to be solved; therefore, it is necessary to provide an automatic control system and method for the fiber mixing amount of airport dry fiber concrete, so as to at least partially solve the problems existing in the prior art.
Disclosure of Invention
A series of concepts in simplified form are introduced in the summary section, which will be described in further detail in the detailed description section; the summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
In order to at least partially solve the problems, the invention provides an automatic control system for the mixing amount of dry and hard fiber concrete fibers of an airport, which comprises the following components:
the fiber detection screening subsystem is used for setting fiber detection selection performance standards of airport dry and hard fiber concrete, performing performance detection on various fibers, screening out synthetic fibers with fiber detection data meeting the airport performance standards, and obtaining screened synthetic fibers;
the fiber filament length segmentation and length fixing subsystem is used for setting the screened synthetic fiber filaments according to fiber dispersibility data and airport pavement slab napping process data and carrying out the fixed-length segmentation treatment on the screened synthetic fibers to obtain segmented fixed-length dry and hard fibers;
the primary setting mixing intelligent mixing subsystem is used for carrying out primary setting on the mixing amount ratio between the segmented fixed-length dry hard fibers and the cement concrete, detecting the state of the primary mixing mixture, and intelligently controlling the mixing process of the fiber concrete to obtain a primary setting mixing control fiber concrete mixture;
And the fiber mixing amount automatic control subsystem prepares the initially designed and controlled fiber concrete mixture into a dry hard fiber concrete mixture test block and performs multi-type strength test verification, intelligently judges whether the multi-type strength test verification information accords with the dry hard fiber concrete strength test verification standard of the airport, and intelligently controls and adjusts the mixing amount ratio of the dry hard fiber concrete fibers of the airport.
Preferably, the fiber detection screening subsystem comprises:
the fiber detection selection standard subsystem is used for setting fiber detection selection performance standards of the airport dry and hard fiber concrete according to the technical requirement information of the airport cement concrete surface layer;
the fiber performance detection subsystem is used for selecting performance standards according to fiber detection, performing performance detection on the multiple fibers and acquiring fiber detection data;
the high-strength fiber screening subsystem screens out synthetic fibers with fiber detection data meeting airport performance standards according to the fiber detection data, and acquires the screened synthetic fibers;
the fiber detection selection performance criteria include: tensile strength standard, alkali resistance standard, deformability standard, adhesive strength standard, self-dispersibility standard, safety standard and thickness standard; synthetic fibers meeting airport performance criteria include: high-strength modified polyester fiber, polyvinyl alcohol fiber or alkali-resistant glass fiber.
Preferably, the fiber filament length segmentation and length fixing subsystem comprises:
the information acquisition data reading subsystem acquires fiber dispersion data through fiber parameter information acquisition; acquiring airport runway panel roughening procedure data through front end procedure data reading;
the fiber filament length setting subsystem is used for setting the screened synthetic fiber filament length according to the fiber dispersibility data and the airport runway panel napping process data;
and the fiber fixed-length segmentation processing subsystem is used for carrying out fixed-length segmentation processing on the screened synthetic fiber according to the screened synthetic fiber length to obtain segmented fixed-length dry and hard fibers.
Preferably, the primary setting and intelligent mixing subsystem comprises:
the primary setting and mixing amount proportioning subsystem is used for carrying out primary setting on the mixing amount proportioning between the segmented fixed-length dry hard fiber and the cement concrete according to the airport cement concrete experience parameters, so as to obtain primary setting and mixing amount proportioning information;
the initial mixing state detection subsystem is used for carrying out initial mixing of the dry hard fibers and the cement concrete according to the initial setting and mixing amount proportioning information to obtain an initial mixing mixture; detecting the state of the initial mixture;
the mixing and blending quantity initial control subsystem is used for intelligently controlling the mixing process of the fiber concrete according to the state of the initial mixing and blending material, gradually adjusting the mixing and blending quantity ratio and obtaining the initially designed mixing and controlling fiber concrete mixture;
The primary setting and mixing amount proportioning information comprises: the mixing amount of the synthetic fiber is 1.0kg/m 3 The mixing amount of the synthetic fiber is 1.2kg/m 3 The mixing amount of the synthetic fiber is 1.4kg/m 3 The mixing amount of the synthetic fiber is 1.6kg/m 3 ；
Detecting the initial mix state includes: detecting the fluidity of the mixture by a wibro consistometer; intelligently judging whether the flowability of the mixture meets the flowability setting standard of the mixture; the mix flowability setting criteria included: the fluidity and slump of the mixture are less than 20mm, and the Vibrio consistency value is more than 15s.
Preferably, the fiber blending amount automatic control subsystem comprises:
the mixture test block subsystem is used for preparing a dry hard fiber concrete mixture test block from the initially designed and controlled fiber concrete mixture;
the intelligent judging subsystem for checking and verifying performs multi-type strength checking and verifying on the dry and hard fiber concrete mixture test block to obtain multi-type strength checking and verifying information; intelligently judging whether the multi-type strength test verification information accords with the strength test verification standard of the airport dry hard fiber concrete, and acquiring a multi-type strength test verification judgment result;
the fiber proportion automatic control subsystem intelligently controls and adjusts the mixing proportion of dry and hard fiber concrete fibers of the airport according to the multi-type strength inspection verification judging result;
The dry and hard fiber concrete mixture test block comprises: early stage anti-cracking plane sheet test block, flexural strength test block and freeze thawing resistance test block.
The invention provides an automatic control method for the fiber mixing amount of airport dry hard fiber concrete, which comprises the following steps:
s100, setting a fiber detection selection performance standard of airport dry and hard fiber concrete, performing performance detection on various fibers, screening out synthetic fibers with fiber detection data meeting the airport performance standard, and obtaining screened synthetic fibers;
s200, setting the filament length of the screened synthetic fiber and carrying out fixed-length segmentation treatment on the screened synthetic fiber according to fiber dispersibility data and airport pavement slab roughening procedure data to obtain segmented fixed-length dry and hard fibers;
s300, preliminarily setting the mixing ratio between the segmented fixed-length dry hard fibers and the cement concrete, detecting the state of the initial mixing mixture, and intelligently controlling the mixing process of the fiber concrete to obtain the initial mixing control fiber concrete mixture;
s400, preparing the initially-designed and controlled fiber concrete mixture into a dry hard fiber concrete mixture test block, performing multi-type strength test and verification, intelligently judging whether the multi-type strength test and verification information meets the strength test and verification standard of the dry hard fiber concrete of the airport, and intelligently controlling and adjusting the mixing ratio of the dry hard fiber concrete fiber of the airport.
Preferably, S100 includes:
s101, setting a fiber detection selection performance standard of airport dry fiber concrete according to technical requirement information of an airport cement concrete surface layer;
s102, selecting performance standards according to fiber detection, performing performance detection on various fibers, and obtaining fiber detection data;
s103, screening out synthetic fibers with fiber detection data meeting airport performance standards according to the fiber detection data, and obtaining screened synthetic fibers;
the fiber detection selection performance criteria include: tensile strength standard, alkali resistance standard, deformability standard, adhesive strength standard, self-dispersibility standard, safety standard and thickness standard; synthetic fibers meeting airport performance criteria include: high-strength modified polyester fiber, polyvinyl alcohol fiber or alkali-resistant glass fiber.
Preferably, S200 includes:
s201, acquiring fiber dispersibility data through fiber parameter information acquisition; acquiring airport runway panel roughening procedure data through front end procedure data reading;
s202, setting the filament length of the screened synthetic fiber according to fiber dispersibility data and airport pavement slab roughening procedure data;
s203, carrying out fixed-length segmentation treatment on the screened synthetic fibers according to the screened synthetic fiber length to obtain segmented fixed-length dry and hard fibers.
Preferably, S300 includes:
s301, preliminarily setting the mixing amount ratio between the segmented fixed-length dry hard fiber and the cement concrete according to airport cement concrete empirical parameters, and obtaining initial setting and mixing amount ratio information;
s302, carrying out initial mixing of the dry hard fibers and the cement concrete according to the initial setting and mixing amount proportioning information to obtain an initial mixing mixture; detecting the state of the initial mixture;
s303, intelligently controlling the mixing process of the fiber concrete according to the state of the initial mixing mixture, and gradually adjusting the mixing blending ratio to obtain the initial mixing control fiber concrete mixture;
the primary setting and mixing amount proportioning information comprises: the mixing amount of the synthetic fiber is 1.0kg/m 3 The mixing amount of the synthetic fiber is 1.2kg/m 3 The mixing amount of the synthetic fiber is 1.4kg/m 3 The mixing amount of the synthetic fiber is 1.6kg/m 3 ；
Detecting the initial mix state includes: detecting the fluidity of the mixture by a wibro consistometer; intelligently judging whether the flowability of the mixture meets the flowability setting standard of the mixture; the mix flowability setting criteria included: the fluidity and slump of the mixture are less than 20mm, and the Vibrio consistency value is more than 15s.
Preferably, S400 includes:
s401, preparing a dry hard fiber concrete mixture test block from the initially-arranged and controlled fiber concrete mixture;
S402, performing multi-type strength test verification on the dry and hard fiber concrete mixture test block to obtain multi-type strength test verification information; intelligently judging whether the multi-type strength test verification information accords with the strength test verification standard of the airport dry hard fiber concrete, and acquiring a multi-type strength test verification judgment result;
s403, intelligently controlling and adjusting the mixing ratio of the dry and hard fiber concrete fibers of the airport according to the multi-type strength test verification judgment result;
the dry and hard fiber concrete mixture test block comprises: early stage anti-cracking plane sheet test block, flexural strength test block and freeze thawing resistance test block.
Compared with the prior art, the invention at least comprises the following beneficial effects:
the invention provides an automatic control system and method for the fiber mixing amount of airport dry and hard fiber concrete, which utilizes a fiber detection screening subsystem to set the fiber detection selection performance standard of the airport dry and hard fiber concrete, performs performance detection on various fibers, screens out synthetic fibers with fiber detection data conforming to the airport performance standard, and acquires the synthetic fibers after screening; the fiber filament length segmentation and length fixing subsystem is used for setting the screened synthetic fiber filaments according to fiber dispersibility data and airport pavement slab napping process data and carrying out the fixed-length segmentation treatment on the screened synthetic fibers to obtain segmented fixed-length dry and hard fibers; the primary setting mixing intelligent mixing subsystem is used for carrying out primary setting on the mixing amount ratio between the segmented fixed-length dry hard fibers and the cement concrete, detecting the state of the primary mixing mixture, and intelligently controlling the mixing process of the fiber concrete to obtain a primary setting mixing control fiber concrete mixture; the fiber mixing amount automatic control subsystem prepares the initially designed and controlled fiber concrete mixture into a dry hard fiber concrete mixture test block and performs multi-type strength test verification, intelligently judges whether the multi-type strength test verification information accords with the airport dry hard fiber concrete strength test verification standard, and intelligently controls and adjusts the airport dry hard fiber concrete fiber mixing amount ratio; the method can be rapidly adapted to the technical development of the aircraft with more frequent updating iteration, and can meet the technical requirements of higher standards of airport engineering construction; the engineering quality of the airport pavement can be improved, and the operation safety of an airport is increased; the dry and hard fiber concrete can reduce the influence of the dry and hard concrete on the cement shrinkage characteristic and the factors such as construction day-night temperature difference, health maintenance, temperature and humidity, wind speed, freezing and thawing and the like, can improve the problems of shrinkage and shrinkage cracks of the pavement slab, reduce the diseases such as cracks and surface falling, crushing, breaking and the like, can prolong the service life of an airport runway, and improve the operation safety of the airport; the pavement slab can bear huge load effect during taking off, landing and sliding of the airplane for a long time and frequently; the fiber type can be detected and screened, the fiber length can be subjected to sectional fixed-length treatment, the fiber concrete mixing process can be controlled more accurately, the control accuracy of the fiber concrete mixing process is greatly improved, the mixing proportion of the dry and hard fiber concrete fibers of an airport can be controlled and adjusted, so that the dry and hard fiber concrete is more suitable for the airport strength inspection and verification standard, and the performance is obviously improved; can reduce early shrinkage cracks of concrete, can improve impact resistance and fatigue resistance of the concrete, can improve the anti-freezing and thawing resistance of flexural tensile strength, and remarkably improves the technical performance of dry and hard fiber concrete.
Other advantages, objects and features of the present invention will be in part apparent to those skilled in the art from consideration of the specification and practice of the invention as set forth in the appended claims.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention. In the drawings:
FIG. 1 shows a high-strength modified polyester fiber blend amount of 1.4kg/m in an automatic airport dry hard fiber concrete fiber blend amount control system according to the present invention 3 An example graph of an anti-crack performance test group; has remarkable contrast effect compared with the reference group; compared with polyvinyl alcohol fiber and alkali-resistant glass fiber, the glass fiber has better contrast effect.
FIG. 2 is a diagram of an embodiment of an automatic control system and method for fiber mixing of airport dry hard fiber concrete and a reference group of fiber-free concrete according to the present invention.
FIG. 3 shows the high-strength modified polyester fiber blend amount of the automatic airport dry hard fiber concrete fiber blend amount control system of the invention of 1.2kg/m 3 An example graph of an anti-crack performance test group; there was a significant control effect compared to the baseline group.
FIG. 4 shows a high-strength modified polyester fiber blend amount of 1.0kg/m for an automatic control system for the fiber blend amount of airport dry hard fiber concrete according to the present invention 3 An example graph of an anti-crack performance test group; there was a significant control effect compared to the baseline group.
FIG. 5 shows the polyvinyl alcohol fiber blending amount of 1.4kg/m for the automatic control system for the fiber blending amount of the dry hard fiber concrete in the airport according to the invention 3 An example graph of an anti-crack performance test group; there was a significant control effect compared to the baseline group.
FIG. 6 shows an alkali-resistant glass fiber blend amount of 1.4kg/m for an automatic control system for fiber blend amount of airport dry hard fiber concrete according to the present invention 3 An example graph of an anti-crack performance test group; there was a significant control effect compared to the baseline group.
FIG. 7 shows the mixing amount of the poly-high-strength modified polyester fiber of the automatic control system for the mixing amount of the dry hard fiber concrete fiber of the airport according to the invention of 1.4kg/m 3 The mixing amount of the vinyl alcohol fiber is 1.4kg/m 3 Alkali-resistant glass fiber with a doping amount of 1.4kg/m 3 Test control example figures; compared with a reference group, the method has obvious statistical effect; high-strength modified polyester fiber with the doping amount of 1.4kg/m 3 The mixing amount of the relative vinyl alcohol fiber is 1.4kg/m 3 Alkali-resistant glass fiber with a doping amount of 1.4kg/m 3 The statistical effect of the test control is better.
FIG. 8 shows the mixing amount of the poly-high-strength modified polyester fiber of the automatic control system for the mixing amount of the dry hard fiber concrete fiber of the airport according to the invention of 1.2kg/m 3 The mixing amount of the vinyl alcohol fiber is 1.2kg/m 3 Alkali-resistant glass fiber with a doping amount of 1.2kg/m 3 Test control example figures; compared with a reference group, the method has obvious statistical effect; the mixing amount of the high-strength modified polyester fiber is 1.2kg/m 3 The mixing amount of the relative vinyl alcohol fiber is 1.2kg/m 3 Alkali-resistant glass fiber with a doping amount of 1.2kg/m 3 The statistical effect of the test control is better.
FIG. 9 shows the mixing amount of the poly-high-strength modified polyester fiber of the automatic control system for the mixing amount of the dry hard fiber concrete fiber of the airport according to the invention of 1.0kg/m 3 The mixing amount of the vinyl alcohol fiber is 1.0kg/m 3 Alkali-resistant glass fiber with a doping amount of 1.0kg/m 3 Test control example figures; compared with a reference group, the method has obvious statistical effect; high-strength modified polyester fiber with the doping amount of 1.0kg/m 3 The mixing amount of the relative vinyl alcohol fiber is 1.0kg/m 3 Alkali-resistant glass fiber with a doping amount of 1.0kg/m 3 The statistical effect of the test control is better.
FIG. 10 is a diagram of an embodiment of an airport dry fiber concrete fiber blend automatic control system according to the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings and examples to enable those skilled in the art to practice the same and to refer to the description; as shown in fig. 1 to 10, the present invention provides an automatic control system for the fiber mixing amount of dry and hard fiber concrete in an airport, comprising:
the fiber detection screening subsystem is used for setting fiber detection selection performance standards of airport dry and hard fiber concrete, performing performance detection on various fibers, screening out synthetic fibers with fiber detection data meeting the airport performance standards, and obtaining screened synthetic fibers;
the fiber filament length segmentation and length fixing subsystem is used for setting the screened synthetic fiber filaments according to fiber dispersibility data and airport pavement slab napping process data and carrying out the fixed-length segmentation treatment on the screened synthetic fibers to obtain segmented fixed-length dry and hard fibers;
the primary setting mixing intelligent mixing subsystem is used for carrying out primary setting on the mixing amount ratio between the segmented fixed-length dry hard fibers and the cement concrete, detecting the state of the primary mixing mixture, and intelligently controlling the mixing process of the fiber concrete to obtain a primary setting mixing control fiber concrete mixture;
and the fiber mixing amount automatic control subsystem prepares the initially designed and controlled fiber concrete mixture into a dry hard fiber concrete mixture test block and performs multi-type strength test verification, intelligently judges whether the multi-type strength test verification information accords with the dry hard fiber concrete strength test verification standard of the airport, and intelligently controls and adjusts the mixing amount ratio of the dry hard fiber concrete fibers of the airport.
The principle and effect of the technical scheme are as follows: the invention provides an automatic control system for the fiber mixing amount of airport dry hard fiber concrete, which comprises the following components: the fiber detection screening subsystem is used for setting fiber detection selection performance standards of airport dry and hard fiber concrete, performing performance detection on various fibers, screening out synthetic fibers with fiber detection data meeting the airport performance standards, and obtaining screened synthetic fibers; the fiber filament length segmentation and length fixing subsystem is used for setting the screened synthetic fiber filaments according to fiber dispersibility data and airport pavement slab napping process data and carrying out the fixed-length segmentation treatment on the screened synthetic fibers to obtain segmented fixed-length dry and hard fibers; the primary setting mixing intelligent mixing subsystem is used for carrying out primary setting on the mixing amount ratio between the segmented fixed-length dry hard fibers and the cement concrete, detecting the state of the primary mixing mixture, and intelligently controlling the mixing process of the fiber concrete to obtain a primary setting mixing control fiber concrete mixture; the fiber mixing amount automatic control subsystem prepares the initially designed and controlled fiber concrete mixture into a dry hard fiber concrete mixture test block and performs multi-type strength test verification, intelligently judges whether the multi-type strength test verification information accords with the airport dry hard fiber concrete strength test verification standard, and intelligently controls and adjusts the airport dry hard fiber concrete fiber mixing amount ratio; the method can be rapidly adapted to the technical development of the aircraft with more frequent updating iteration, and can meet the technical requirements of higher standards of airport engineering construction; the engineering quality of the airport pavement can be improved, and the operation safety of an airport is increased; the dry and hard fiber concrete can reduce the influence of the dry and hard concrete on the cement shrinkage characteristic and the factors such as construction day-night temperature difference, health maintenance, temperature and humidity, wind speed, freezing and thawing and the like, can improve the problems of shrinkage and shrinkage cracks of the pavement slab, reduce the diseases such as cracks and surface falling, crushing, breaking and the like, can prolong the service life of an airport runway, and improve the operation safety of the airport; the pavement slab can bear huge load effect during taking off, landing and sliding of the airplane for a long time and frequently; the fiber type can be detected and screened, the fiber length can be subjected to sectional fixed-length treatment, the fiber concrete mixing process can be controlled more accurately, the control accuracy of the fiber concrete mixing process is greatly improved, the mixing proportion of the dry and hard fiber concrete fibers of an airport can be controlled and adjusted, so that the dry and hard fiber concrete is more suitable for the airport strength inspection and verification standard, and the performance is obviously improved; the early shrinkage crack of the concrete can be reduced, the impact resistance and fatigue resistance of the concrete can be improved, the freeze-thawing resistance of the flexural tensile strength can be improved, and the technical performance of the dry and hard fiber concrete is obviously improved;
And (3) test block manufacturing: after the detection of the Vibrio consistency of the mixture is finished, an early-stage anti-cracking plane sheet test block and an anti-breaking strength test block are manufactured, and when the design has requirements, an anti-freezing and thawing strength test block is manufactured; the early-stage anti-cracking plane sheet test block is manufactured by adopting a concrete knife edge constraint early-stage cracking test mould of 800mm multiplied by 600mm multiplied by 100mm, and is formed by a flat-plate surface vibrator, wherein each group of test pieces is not less than 2;
early crack resistance test step: the test temperature was controlled to be (20.+ -. 2) DEG C and the relative humidity was controlled to be (60.+ -. 5) DEG C. After the test piece is molded for 30min, the position and the wind speed of the fan are immediately regulated, so that the wind speed at the position 100mm above the center of the surface of the test piece is (5+/-0.5) m/s, and the wind direction is parallel to the surface of the test piece and the crack inducer. The test time is calculated from the time of adding water and mixing the self-hardening (fiber) concrete, and the crack is measured and read within (24+/-0.5) h; the length of the crack is measured by a steel ruler, and the straight line distance between two ends of the crack is taken as the length of the crack. When two cracks are formed on one knife edge, the lengths of the two cracks can be added to be converted into one crack; the width of each crack is measured by a reading microscope with the magnification of at least 40 times, and the maximum width of each crack is measured;
each group should take the arithmetic average value of the average cracking area of 2 or more test pieces as the detection value of the average cracking area of the test pieces; calculating the total area of the test piece cracks:
A cr ＝Σw i,max ·l i
Calculating a crack reduction coefficient eta:
wherein: a is that cr The total area of the crack of the test piece is expressed in mm < 2 >; a is that fcr Represents the total area of cracks of the fiber concrete test piece, A mcr Representing the total area of the cracks of the standard concrete test piece, wherein the unit is mm < 2 >; w (w) i,max Represents the maximum width of the ith crack in mm; l (L) i Represents the length of the ith crack in mm;
evaluating the crack limiting efficiency grade of the fiber according to a table 1 according to the calculation result eta;
table 1 crack limiting rating criteria
Flexural strength test, freeze thawing test: performing nutrition, detection and result statistics according to standard requirements in the flexural strength test and the freezing resistance test;
analysis of test results: firstly, fiber concrete meeting the design strength requirement is screened according to the flexural strength and freeze thawing resistance test results, on the basis, fiber concrete proportion with the first-level crack limiting efficiency grade is selected according to an early crack resistance test, and 1-2 fiber types and doping amounts are determined according to the principle of economy; when the time is shorter, the fiber concrete proportion of which the crack limiting efficiency level reaches the first level is selected to carry out field test section verification only after the early crack resistance test is completed;
impact resistance test, bond strength test of concrete and steel bar verify: manufacturing test blocks for impact resistance test and bond strength test of concrete and steel bars for fiber concrete of selected types and doping amounts, and performing a concrete performance comparison test with reference concrete, wherein when the detection result is equal to the reference mixing ratio, the fiber selection and doping amount of the dry and hard concrete mixing ratio are obtained; according to theoretical analysis and test results, the impact resistance of the fiber concrete is improved to a certain extent compared with that of the standard concrete;
And (3) verifying in a test section: after the fiber types and the doping amounts are determined, performing field test section verification, and mixing the mixture by a mixing station according to the discharging sequence when the mixture doped with the fiber in the third step is mixed; the fiber length is intelligently adjusted by observing the dispersibility of the mixed material fibers, the adhesion condition of the mixed material and a carriage after unloading of a transport vehicle and the texture effect after napping.
In one embodiment, a fiber detection screening subsystem includes:
the fiber detection selection standard subsystem is used for setting fiber detection selection performance standards of the airport dry and hard fiber concrete according to the technical requirement information of the airport cement concrete surface layer;
the fiber performance detection subsystem is used for selecting performance standards according to fiber detection, performing performance detection on the multiple fibers and acquiring fiber detection data;
the high-strength fiber screening subsystem screens out synthetic fibers with fiber detection data meeting airport performance standards according to the fiber detection data, and acquires the screened synthetic fibers;
the fiber detection selection performance criteria include: tensile strength standard, alkali resistance standard, deformability standard, adhesive strength standard, self-dispersibility standard, safety standard and thickness standard; synthetic fibers meeting airport performance criteria include: high-strength modified polyester fiber, polyvinyl alcohol fiber or alkali-resistant glass fiber.
The principle and effect of the technical scheme are as follows: the fiber detection screening subsystem comprises: the fiber detection selection standard subsystem is used for setting fiber detection selection performance standards of the airport dry and hard fiber concrete according to the technical requirement information of the airport cement concrete surface layer; the fiber performance detection subsystem is used for selecting performance standards according to fiber detection, performing performance detection on the multiple fibers and acquiring fiber detection data; the high-strength fiber screening subsystem screens out synthetic fibers with fiber detection data meeting airport performance standards according to the fiber detection data, and acquires the screened synthetic fibers; the fiber detection selection performance criteria include: tensile strength standard, alkali resistance standard, deformability standard, adhesive strength standard, self-dispersibility standard, safety standard and thickness standard; synthetic fibers meeting airport performance criteria include: high-strength modified polyester fibers, polyvinyl alcohol fibers or alkali-resistant glass fibers; the type of the screened fiber can be detected; can reduce the influence of the dry shrinkage characteristic of the cement and the factors such as construction day-night temperature difference, health preserving, temperature and humidity, wind speed, freezing and thawing and the like on the dry hard concrete.
In one embodiment, a filament length segmentation and sizing subsystem includes:
The information acquisition data reading subsystem acquires fiber dispersion data through fiber parameter information acquisition; acquiring airport runway panel roughening procedure data through front end procedure data reading;
the fiber filament length setting subsystem is used for setting the screened synthetic fiber filament length according to the fiber dispersibility data and the airport runway panel napping process data;
and the fiber fixed-length segmentation processing subsystem is used for carrying out fixed-length segmentation processing on the screened synthetic fiber according to the screened synthetic fiber length to obtain segmented fixed-length dry and hard fibers.
The principle and effect of the technical scheme are as follows: the fiber filament length segmentation fixed length subsystem comprises: the information acquisition data reading subsystem acquires fiber dispersion data through fiber parameter information acquisition; acquiring airport runway panel roughening procedure data through front end procedure data reading; the fiber filament length setting subsystem is used for setting the screened synthetic fiber filament length according to the fiber dispersibility data and the airport runway panel napping process data; the fiber fixed-length sectioning processing subsystem is used for carrying out fixed-length sectioning processing on the screened synthetic fiber according to the screened synthetic fiber length to obtain sectioning fixed-length dry and hard fibers; the fiber length can be subjected to sectional fixed-length treatment, and the fiber control precision is obviously improved.
In one embodiment, a pre-set and intelligent compounding subsystem includes:
the primary setting and mixing amount proportioning subsystem is used for carrying out primary setting on the mixing amount proportioning between the segmented fixed-length dry hard fiber and the cement concrete according to the airport cement concrete experience parameters, so as to obtain primary setting and mixing amount proportioning information;
the initial mixing state detection subsystem is used for carrying out initial mixing of the dry hard fibers and the cement concrete according to the initial setting and mixing amount proportioning information to obtain an initial mixing mixture; detecting the state of the initial mixture;
the mixing and blending quantity initial control subsystem is used for intelligently controlling the mixing process of the fiber concrete according to the state of the initial mixing and blending material, gradually adjusting the mixing and blending quantity ratio and obtaining the initially designed mixing and controlling fiber concrete mixture;
the primary setting and mixing amount proportioning information comprises: the mixing amount of the synthetic fiber is 1.0kg/m 3 The mixing amount of the synthetic fiber is 1.2kg/m 3 The mixing amount of the synthetic fiber is 1.4kg/m 3 The mixing amount of the synthetic fiber is 1.6kg/m 3 ；
Detecting the initial mix state includes: detecting the fluidity of the mixture by a wibro consistometer; intelligently judging whether the flowability of the mixture meets the flowability setting standard of the mixture; the mix flowability setting criteria included: the fluidity and slump of the mixture are less than 20mm, and the Vibrio consistency value is more than 15s;
The intelligent control fiber concrete mixing process gradually adjusts mixing blending ratio, and the obtaining of the initially designed and controlled fiber concrete mixture comprises the following steps: detecting the fluidity of the mixture according to a Vibrio consistometer, and when the fluidity slump and the Vibrio consistometer value of the mixture do not meet the fluidity setting standard of the mixture, gradually adjusting the mixing ratio of the sectional fixed-length dry hard fiber and the cement concrete, and performing first-step incremental addition on the sectional fixed-length dry hard fiber according to the set first consistency adjusting addition; in the first step of incremental addition, the segmented fixed-length dry hard fibers are flatly spread into a first addition surface which is the same as the surface of the mixture, and the segmented fixed-length dry hard fibers are covered by a film covering plate to keep a fiber spreading state; slowly adding the segmented fixed-length dry hard fibers in a uniformly-spread state into the mixture from one side of the first adding surface, so that the fibers are uniformly dispersed and added in an incremental manner; if the mixing still does not meet the fluidity setting standard of the mixture after the first step of incremental addition, performing a second step of incremental addition or an N-th step of incremental addition in the same process with the first step of incremental addition; until the mix flow slump and tretinoin values meet the mix flow set criteria.
The principle and effect of the technical scheme are as follows: primary setting mixing intelligent mixing subsystemComprising the following steps: the primary setting and mixing amount proportioning subsystem is used for carrying out primary setting on the mixing amount proportioning between the segmented fixed-length dry hard fiber and the cement concrete according to the airport cement concrete experience parameters, so as to obtain primary setting and mixing amount proportioning information; the initial mixing state detection subsystem is used for carrying out initial mixing of the dry hard fibers and the cement concrete according to the initial setting and mixing amount proportioning information to obtain an initial mixing mixture; detecting the state of the initial mixture; the mixing and blending quantity initial control subsystem is used for intelligently controlling the mixing process of the fiber concrete according to the state of the initial mixing and blending material, gradually adjusting the mixing and blending quantity ratio and obtaining the initially designed mixing and controlling fiber concrete mixture; the primary setting and mixing amount proportioning information comprises: the mixing amount of the synthetic fiber is 1.0kg/m 3 The mixing amount of the synthetic fiber is 1.2kg/m 3 The mixing amount of the synthetic fiber is 1.4kg/m 3 The mixing amount of the synthetic fiber is 1.6kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the Detecting the initial mix state includes: detecting the fluidity of the mixture by a wibro consistometer; intelligently judging whether the flowability of the mixture meets the flowability setting standard of the mixture; the mix flowability setting criteria included: the fluidity and slump of the mixture are less than 20mm, and the Vibrio consistency value is more than 15s;
The intelligent control fiber concrete mixing process gradually adjusts mixing blending ratio, and the obtaining of the initially designed and controlled fiber concrete mixture comprises the following steps: detecting the fluidity of the mixture according to a Vibrio consistometer, and when the fluidity slump and the Vibrio consistometer value of the mixture do not meet the fluidity setting standard of the mixture, gradually adjusting the mixing ratio of the sectional fixed-length dry hard fiber and the cement concrete, and performing first-step incremental addition on the sectional fixed-length dry hard fiber according to the set first consistency adjusting addition; in the first step of incremental addition, the segmented fixed-length dry hard fibers are flatly spread into a first addition surface which is the same as the surface of the mixture, and the segmented fixed-length dry hard fibers are covered by a film covering plate to keep a fiber spreading state; slowly adding the segmented fixed-length dry hard fibers in a uniformly-spread state into the mixture from one side of the first adding surface, so that the fibers are uniformly dispersed and added in an incremental manner; if the mixing still does not meet the fluidity setting standard of the mixture after the first step of incremental addition, performing a second step of incremental addition or an N-th step of incremental addition in the same process with the first step of incremental addition; until the fluidity slump and the Vib consistency value of the mixture meet the fluidity setting standard of the mixture; the fiber concrete mixing process can be controlled more accurately, and the control accuracy of the fiber concrete mixing process is greatly improved.
In one embodiment, the fiber blend automatic control subsystem comprises:
the mixture test block subsystem is used for preparing a dry hard fiber concrete mixture test block from the initially designed and controlled fiber concrete mixture;
the intelligent judging subsystem for checking and verifying performs multi-type strength checking and verifying on the dry and hard fiber concrete mixture test block to obtain multi-type strength checking and verifying information; intelligently judging whether the multi-type strength test verification information accords with the strength test verification standard of the airport dry hard fiber concrete, and acquiring a multi-type strength test verification judgment result;
the fiber proportion automatic control subsystem intelligently controls and adjusts the mixing proportion of dry and hard fiber concrete fibers of the airport according to the multi-type strength inspection verification judging result;
the dry and hard fiber concrete mixture test block comprises: early stage anti-cracking plane thin plate test block, anti-breaking strength test block and freeze-thawing resistance test block;
performing multi-type strength test verification on the dry and hard fiber concrete mixture test block to obtain multi-type strength test verification information; the intelligent judgment of whether the multi-type strength test verification information accords with the strength test verification standard of the airport dry hard fiber concrete comprises the following steps: performing multi-type strength test verification on the dry and hard fiber concrete mixture test block; the multi-type intensity verification includes: performing multi-type strength test on the dry and hard fiber concrete mixture test block, obtaining multi-type strength test information and obtaining a crack limiting efficiency grade; the multiple classes of intensity tests include: checking the cracking strength, the breaking strength and the freeze-thawing resistance, and obtaining the cracking limiting efficiency grade; intelligently judging whether the multi-type strength test meets the airport concrete strength test standard and the airport crack limiting efficacy grade standard; the airport crack limiting efficiency grade standard is a first-level crack limiting efficiency grade; screening out dry and hard fiber concrete mixture test blocks meeting airport concrete strength test standards and airport crack limiting efficacy grade standards, respectively performing impact resistance verification, and performing bond strength verification on concrete and reinforcing steel bars to obtain impact resistance bond verification information; and according to the multi-type strength inspection verification information and the impact-resistant bond-wrapping verification information, intelligently controlling and adjusting the mixing proportion of dry and hard fiber concrete fibers of the airport until the multi-type strength inspection verification information and the impact-resistant bond-wrapping verification information reach the set verification standard, and continuously optimizing and enhancing.
The principle and effect of the technical scheme are as follows: the fiber doping amount automatic control subsystem comprises: the mixture test block subsystem is used for preparing a dry hard fiber concrete mixture test block from the initially designed and controlled fiber concrete mixture; the intelligent judging subsystem for checking and verifying performs multi-type strength checking and verifying on the dry and hard fiber concrete mixture test block to obtain multi-type strength checking and verifying information; intelligently judging whether the multi-type strength test verification information accords with the strength test verification standard of the airport dry hard fiber concrete, and acquiring a multi-type strength test verification judgment result; the fiber proportion automatic control subsystem intelligently controls and adjusts the mixing proportion of dry and hard fiber concrete fibers of the airport according to the multi-type strength inspection verification judging result; the dry and hard fiber concrete mixture test block comprises: early stage anti-cracking plane thin plate test block, anti-breaking strength test block and freeze-thawing resistance test block; performing multi-type strength test verification on the dry and hard fiber concrete mixture test block to obtain multi-type strength test verification information; the intelligent judgment of whether the multi-type strength test verification information accords with the strength test verification standard of the airport dry hard fiber concrete comprises the following steps: performing multi-type strength test verification on the dry and hard fiber concrete mixture test block; the multi-type intensity verification includes: performing multi-type strength test on the dry and hard fiber concrete mixture test block, obtaining multi-type strength test information and obtaining a crack limiting efficiency grade; the multiple classes of intensity tests include: checking the cracking strength, the breaking strength and the freeze-thawing resistance, and obtaining the cracking limiting efficiency grade; intelligently judging whether the multi-type strength test meets the airport concrete strength test standard and the airport crack limiting efficacy grade standard; the airport crack limiting efficiency grade standard is a first-level crack limiting efficiency grade; screening out dry and hard fiber concrete mixture test blocks meeting airport concrete strength test standards and airport crack limiting efficacy grade standards, respectively performing impact resistance verification, and performing bond strength verification on concrete and reinforcing steel bars to obtain impact resistance bond verification information; according to the multi-type strength inspection verification information and the impact-resistant bond-wrapping verification information, intelligently controlling and adjusting the mixing proportion of dry and hard fiber concrete fibers of the airport until the multi-type strength inspection verification information and the impact-resistant bond-wrapping verification information reach the set verification standard, and continuously optimizing and enhancing; the mixing ratio of the dry and hard fiber concrete fiber of the airport can be controlled and adjusted to enable the dry and hard fiber concrete to be more suitable for the airport strength inspection and verification standard and obviously improve the performance.
The invention provides an automatic control method for the fiber mixing amount of airport dry hard fiber concrete, which comprises the following steps:
s100, setting a fiber detection selection performance standard of airport dry and hard fiber concrete, performing performance detection on various fibers, screening out synthetic fibers with fiber detection data meeting the airport performance standard, and obtaining screened synthetic fibers;
s200, setting the filament length of the screened synthetic fiber and carrying out fixed-length segmentation treatment on the screened synthetic fiber according to fiber dispersibility data and airport pavement slab roughening procedure data to obtain segmented fixed-length dry and hard fibers;
s300, preliminarily setting the mixing ratio between the segmented fixed-length dry hard fibers and the cement concrete, detecting the state of the initial mixing mixture, and intelligently controlling the mixing process of the fiber concrete to obtain the initial mixing control fiber concrete mixture;
s400, preparing the initially-designed and controlled fiber concrete mixture into a dry hard fiber concrete mixture test block, performing multi-type strength test and verification, intelligently judging whether the multi-type strength test and verification information meets the strength test and verification standard of the dry hard fiber concrete of the airport, and intelligently controlling and adjusting the mixing ratio of the dry hard fiber concrete fiber of the airport.
The principle and effect of the technical scheme are as follows: the invention provides an automatic control method for the fiber mixing amount of airport dry hard fiber concrete, which comprises the following steps: setting a fiber detection selection performance standard of airport dry fiber concrete, performing performance detection on various fibers, screening out synthetic fibers with fiber detection data meeting the airport performance standard, and obtaining screened synthetic fibers; setting the synthetic fiber filament length after screening according to the fiber dispersibility data and the airport pavement slab roughening procedure data, and carrying out fixed-length and sectional treatment on the synthetic fiber after screening to obtain sectional fixed-length dry and hard fibers; the method comprises the steps of initially setting the mixing proportion between the sectional fixed-length dry hard fiber and the cement concrete, detecting the state of the initial mixing mixture, intelligently controlling the mixing process of the fiber concrete, and obtaining the initial mixing control fiber concrete mixture; preparing a primary setting and control fiber concrete mixture into a dry hard fiber concrete mixture test block, performing multi-type strength test and verification, intelligently judging whether the multi-type strength test and verification information meets the dry hard fiber concrete strength test and verification standard of the airport, and intelligently controlling and adjusting the mixing ratio of dry hard fiber concrete fibers of the airport; the method can be rapidly adapted to the technical development of the aircraft with more frequent updating iteration, and can meet the technical requirements of higher standards of airport engineering construction; the engineering quality of the airport pavement can be improved, and the operation safety of an airport is increased; the dry and hard fiber concrete can reduce the influence of the dry and hard concrete on the cement shrinkage characteristic and the factors such as construction day-night temperature difference, health maintenance, temperature and humidity, wind speed, freezing and thawing and the like, can improve the problems of shrinkage and shrinkage cracks of the pavement slab, reduce the diseases such as cracks and surface falling, crushing, breaking and the like, can prolong the service life of an airport runway, and improve the operation safety of the airport; the pavement slab can bear huge load effect during taking off, landing and sliding of the airplane for a long time and frequently; the fiber type can be detected and screened, the fiber length can be subjected to sectional fixed-length treatment, the fiber concrete mixing process can be controlled more accurately, the control accuracy of the fiber concrete mixing process is greatly improved, the mixing proportion of the dry and hard fiber concrete fibers of an airport can be controlled and adjusted, so that the dry and hard fiber concrete is more suitable for the airport strength inspection and verification standard, and the performance is obviously improved; the early shrinkage crack of the concrete can be reduced, the impact resistance and fatigue resistance of the concrete can be improved, the freeze-thawing resistance of the flexural tensile strength can be improved, and the technical performance of the dry and hard fiber concrete is obviously improved;
And (3) test block manufacturing: after the detection of the Vibrio consistency of the mixture is finished, an early-stage anti-cracking plane sheet test block and an anti-breaking strength test block are manufactured, and when the design has requirements, an anti-freezing and thawing strength test block is manufactured; the early-stage anti-cracking plane sheet test block is manufactured by adopting a concrete knife edge constraint early-stage cracking test mould of 800mm multiplied by 600mm multiplied by 100mm, and is formed by a flat-plate surface vibrator, wherein each group of test pieces is not less than 2.
Early crack resistance test step: the test temperature was controlled to be (20.+ -. 2) DEG C and the relative humidity was controlled to be (60.+ -. 5) DEG C. After the test piece is molded for 30min, the position and the wind speed of the fan are immediately regulated, so that the wind speed at the position 100mm above the center of the surface of the test piece is (5+/-0.5) m/s, and the wind direction is parallel to the surface of the test piece and the crack inducer. The test time is calculated from the time of adding water and mixing the self-hardening (fiber) concrete, and the crack is measured and read within (24+/-0.5) h; the length of the crack is measured by a steel ruler, and the straight line distance between two ends of the crack is taken as the length of the crack. When two cracks are formed on one knife edge, the lengths of the two cracks can be added to be converted into one crack; the width of each crack is measured by a reading microscope with the magnification of at least 40 times, and the maximum width of each crack is measured;
each group should take the arithmetic average value of the average cracking area of 2 or more test pieces as the detection value of the average cracking area of the test pieces; calculating the total area of the test piece cracks:
A cr ＝Σw i,max ·l i
Calculating a crack reduction coefficient eta:
wherein: a is that cr The total area of the crack of the test piece is expressed in mm < 2 >; a is that fcr Represents the total area of cracks of the fiber concrete test piece, A mcr Representing the total area of the cracks of the standard concrete test piece, wherein the unit is mm < 2 >; w (w) i,max Representation ofThe maximum width of the ith crack is in mm; l (L) i The length of the ith slit is expressed in mm.
Evaluating the crack limiting efficiency grade of the fiber according to a table 1 according to the calculation result eta;
table 1 crack limiting rating criteria
Flexural strength test, freeze thawing test: performing nutrition, detection and result statistics according to standard requirements in the flexural strength test and the freezing resistance test;
analysis of test results: firstly, fiber concrete meeting the design strength requirement is screened according to the flexural strength and freeze thawing resistance test results, on the basis, fiber concrete proportion with the first-level crack limiting efficiency grade is selected according to an early crack resistance test, and 1-2 fiber types and doping amounts are determined according to the principle of economy; when the time is shorter, the fiber concrete proportion of which the crack limiting efficiency level reaches the first level is selected to carry out field test section verification only after the early crack resistance test is completed;
impact resistance test, bond strength test of concrete and steel bar verify: and (3) manufacturing test blocks for impact resistance tests and bond strength tests of concrete and steel bars for fiber concrete of selected types and doping amounts, and performing a concrete performance comparison test with reference concrete, wherein when the detection result is equal to the reference mixing ratio, the fiber selection and doping amount of the dry and hard concrete mixing ratio are obtained. According to theoretical analysis and test results, the impact resistance of the fiber concrete is improved to a certain extent compared with that of the standard concrete;
And (3) verifying in a test section: after the fiber types and the doping amounts are determined, performing field test section verification, and mixing the mixture by a mixing station according to the discharging sequence when the mixture doped with the fiber in the third step is mixed; the fiber length is intelligently adjusted by observing the dispersibility of the mixed material fibers, the adhesion condition of the mixed material and a carriage after unloading of a transport vehicle and the texture effect after napping.
In one embodiment, S100 comprises:
s101, setting a fiber detection selection performance standard of airport dry fiber concrete according to technical requirement information of an airport cement concrete surface layer;
s102, selecting performance standards according to fiber detection, performing performance detection on various fibers, and obtaining fiber detection data;
s103, screening out synthetic fibers with fiber detection data meeting airport performance standards according to the fiber detection data, and obtaining screened synthetic fibers;
the fiber detection selection performance criteria include: tensile strength standard, alkali resistance standard, deformability standard, adhesive strength standard, self-dispersibility standard, safety standard and thickness standard; synthetic fibers meeting airport performance criteria include: high-strength modified polyester fiber, polyvinyl alcohol fiber or alkali-resistant glass fiber.
The principle and effect of the technical scheme are as follows: setting a fiber detection selection performance standard of airport dry and hard fiber concrete according to technical requirement information of an airport cement concrete surface layer; selecting performance standards according to fiber detection, and performing performance detection on various fibers to obtain fiber detection data; according to the fiber detection data, screening out synthetic fibers of which the fiber detection data meet airport performance standards, and obtaining screened synthetic fibers; the fiber detection selection performance criteria include: tensile strength standard, alkali resistance standard, deformability standard, adhesive strength standard, self-dispersibility standard, safety standard and thickness standard; synthetic fibers meeting airport performance criteria include: high-strength modified polyester fibers, polyvinyl alcohol fibers or alkali-resistant glass fibers; the type of the screened fiber can be detected; can reduce the influence of the dry shrinkage characteristic of the cement and the factors such as construction day-night temperature difference, health preserving, temperature and humidity, wind speed, freezing and thawing and the like on the dry hard concrete.
In one embodiment, S200 includes:
s201, acquiring fiber dispersibility data through fiber parameter information acquisition; acquiring airport runway panel roughening procedure data through front end procedure data reading;
S202, setting the filament length of the screened synthetic fiber according to fiber dispersibility data and airport pavement slab roughening procedure data;
s203, carrying out fixed-length segmentation treatment on the screened synthetic fibers according to the screened synthetic fiber length to obtain segmented fixed-length dry and hard fibers.
The principle and effect of the technical scheme are as follows: collecting fiber dispersibility data through fiber parameter information collection; acquiring airport runway panel roughening procedure data through front end procedure data reading; setting the synthetic fiber filament length after screening according to the fiber dispersibility data and the airport pavement slab roughening procedure data; performing fixed-length segmentation treatment on the screened synthetic fibers according to the length of the screened synthetic fibers to obtain segmented fixed-length dry and hard fibers; the fiber length can be subjected to sectional fixed-length treatment, and the fiber control precision is obviously improved.
In one embodiment, S300 includes:
s301, preliminarily setting the mixing amount ratio between the segmented fixed-length dry hard fiber and the cement concrete according to airport cement concrete empirical parameters, and obtaining initial setting and mixing amount ratio information;
s302, carrying out initial mixing of the dry hard fibers and the cement concrete according to the initial setting and mixing amount proportioning information to obtain an initial mixing mixture; detecting the state of the initial mixture;
S303, intelligently controlling the mixing process of the fiber concrete according to the state of the initial mixing mixture, and gradually adjusting the mixing blending ratio to obtain the initial mixing control fiber concrete mixture;
the primary setting and mixing amount proportioning information comprises: the mixing amount of the synthetic fiber is 1.0kg/m 3 The mixing amount of the synthetic fiber is 1.2kg/m 3 The mixing amount of the synthetic fiber is 1.4kg/m 3 The mixing amount of the synthetic fiber is 1.6kg/m 3 ；
Detecting the initial mix state includes: detecting the fluidity of the mixture by a wibro consistometer; intelligently judging whether the flowability of the mixture meets the flowability setting standard of the mixture; the mix flowability setting criteria included: the fluidity and slump of the mixture are less than 20mm, and the Vibrio consistency value is more than 15s;
the intelligent control fiber concrete mixing process gradually adjusts mixing blending ratio, and the obtaining of the initially designed and controlled fiber concrete mixture comprises the following steps: detecting the fluidity of the mixture according to a Vibrio consistometer, and when the fluidity slump and the Vibrio consistometer value of the mixture do not meet the fluidity setting standard of the mixture, gradually adjusting the mixing ratio of the sectional fixed-length dry hard fiber and the cement concrete, and performing first-step incremental addition on the sectional fixed-length dry hard fiber according to the set first consistency adjusting addition; in the first step of incremental addition, the segmented fixed-length dry hard fibers are flatly spread into a first addition surface which is the same as the surface of the mixture, and the segmented fixed-length dry hard fibers are covered by a film covering plate to keep a fiber spreading state; slowly adding the segmented fixed-length dry hard fibers in a uniformly-spread state into the mixture from one side of the first adding surface, so that the fibers are uniformly dispersed and added in an incremental manner; if the mixing still does not meet the fluidity setting standard of the mixture after the first step of incremental addition, performing a second step of incremental addition or an N-th step of incremental addition in the same process with the first step of incremental addition; until the mix flow slump and tretinoin values meet the mix flow set criteria.
The principle and effect of the technical scheme are as follows: according to airport cement concrete experience parameters, initially setting the mixing amount ratio between the segmented fixed-length dry hard fiber and the cement concrete to obtain initial setting and mixing amount ratio information; according to the initial setting and mixing amount proportioning information, carrying out initial mixing of the dry hard fibers and the cement concrete to obtain an initial mixing mixture; detecting the state of the initial mixture; according to the state of the initial mixing mixture, intelligently controlling the mixing process of the fiber concrete, gradually adjusting the mixing amount ratio, and obtaining the initial mixing control fiber concrete mixture; the primary setting and mixing amount proportioning information comprises: the mixing amount of the synthetic fiber is 1.0kg/m 3 The mixing amount of the synthetic fiber is 1.2kg/m 3 The mixing amount of the synthetic fiber is 1.4kg/m 3 The mixing amount of the synthetic fiber is 1.6kg/m 3 The method comprises the steps of carrying out a first treatment on the surface of the Detecting the initial mix state includes: detecting the fluidity of the mixture by a wibro consistometer; intelligently judging whether the flowability of the mixture meets the flowability setting standard of the mixture; the mix flowability setting criteria included: the fluidity and slump of the mixture are less than 20mm, and the Vibrio consistency value is more than 15s;
the intelligent control fiber concrete mixing process gradually adjusts mixing blending ratio, and the obtaining of the initially designed and controlled fiber concrete mixture comprises the following steps: detecting the fluidity of the mixture according to a Vibrio consistometer, and when the fluidity slump and the Vibrio consistometer value of the mixture do not meet the fluidity setting standard of the mixture, gradually adjusting the mixing ratio of the sectional fixed-length dry hard fiber and the cement concrete, and performing first-step incremental addition on the sectional fixed-length dry hard fiber according to the set first consistency adjusting addition; in the first step of incremental addition, the segmented fixed-length dry hard fibers are flatly spread into a first addition surface which is the same as the surface of the mixture, and the segmented fixed-length dry hard fibers are covered by a film covering plate to keep a fiber spreading state; slowly adding the segmented fixed-length dry hard fibers in a uniformly-spread state into the mixture from one side of the first adding surface, so that the fibers are uniformly dispersed and added in an incremental manner; if the mixing still does not meet the fluidity setting standard of the mixture after the first step of incremental addition, performing a second step of incremental addition or an N-th step of incremental addition in the same process with the first step of incremental addition; until the fluidity slump and the Vib consistency value of the mixture meet the fluidity setting standard of the mixture; the fiber concrete mixing process can be controlled more accurately, and the control accuracy of the fiber concrete mixing process is greatly improved.
In one embodiment, S400 includes:
s401, preparing a dry hard fiber concrete mixture test block from the initially-arranged and controlled fiber concrete mixture;
s402, performing multi-type strength test verification on the dry and hard fiber concrete mixture test block to obtain multi-type strength test verification information; intelligently judging whether the multi-type strength test verification information accords with the strength test verification standard of the airport dry hard fiber concrete, and acquiring a multi-type strength test verification judgment result;
s403, intelligently controlling and adjusting the mixing ratio of the dry and hard fiber concrete fibers of the airport according to the multi-type strength test verification judgment result;
the dry and hard fiber concrete mixture test block comprises: early stage anti-cracking plane thin plate test block, anti-breaking strength test block and freeze-thawing resistance test block;
performing multi-type strength test verification on the dry and hard fiber concrete mixture test block to obtain multi-type strength test verification information; the intelligent judgment of whether the multi-type strength test verification information accords with the strength test verification standard of the airport dry hard fiber concrete comprises the following steps: performing multi-type strength test verification on the dry and hard fiber concrete mixture test block; the multi-type intensity verification includes: performing multi-type strength test on the dry and hard fiber concrete mixture test block, obtaining multi-type strength test information and obtaining a crack limiting efficiency grade; the multiple classes of intensity tests include: checking the cracking strength, the breaking strength and the freeze-thawing resistance, and obtaining the cracking limiting efficiency grade; intelligently judging whether the multi-type strength test meets the airport concrete strength test standard and the airport crack limiting efficacy grade standard; the airport crack limiting efficiency grade standard is a first-level crack limiting efficiency grade; screening out dry and hard fiber concrete mixture test blocks meeting airport concrete strength test standards and airport crack limiting efficacy grade standards, respectively performing impact resistance verification, and performing bond strength verification on concrete and reinforcing steel bars to obtain impact resistance bond verification information; and according to the multi-type strength inspection verification information and the impact-resistant bond-wrapping verification information, intelligently controlling and adjusting the mixing proportion of dry and hard fiber concrete fibers of the airport until the multi-type strength inspection verification information and the impact-resistant bond-wrapping verification information reach the set verification standard, and continuously optimizing and enhancing.
The principle and effect of the technical scheme are as follows: preparing a dry hard fiber concrete mixture test block from the initially-arranged and controlled fiber concrete mixture; performing multi-type strength test verification on the dry and hard fiber concrete mixture test block to obtain multi-type strength test verification information; intelligently judging whether the multi-type strength test verification information accords with the strength test verification standard of the airport dry hard fiber concrete, and acquiring a multi-type strength test verification judgment result; according to the multi-type strength test, verification and judgment results, intelligently controlling and adjusting the mixing ratio of dry and hard fiber concrete fibers of the airport; the dry and hard fiber concrete mixture test block comprises: early stage anti-cracking plane thin plate test block, anti-breaking strength test block and freeze-thawing resistance test block; performing multi-type strength test verification on the dry and hard fiber concrete mixture test block to obtain multi-type strength test verification information; the intelligent judgment of whether the multi-type strength test verification information accords with the strength test verification standard of the airport dry hard fiber concrete comprises the following steps: performing multi-type strength test verification on the dry and hard fiber concrete mixture test block; the multi-type intensity verification includes: performing multi-type strength test on the dry and hard fiber concrete mixture test block, obtaining multi-type strength test information and obtaining a crack limiting efficiency grade; the multiple classes of intensity tests include: checking the cracking strength, the breaking strength and the freeze-thawing resistance, and obtaining the cracking limiting efficiency grade; intelligently judging whether the multi-type strength test meets the airport concrete strength test standard and the airport crack limiting efficacy grade standard; the airport crack limiting efficiency grade standard is a first-level crack limiting efficiency grade; screening out dry and hard fiber concrete mixture test blocks meeting airport concrete strength test standards and airport crack limiting efficacy grade standards, respectively performing impact resistance verification, and performing bond strength verification on concrete and reinforcing steel bars to obtain impact resistance bond verification information; according to the multi-type strength inspection verification information and the impact-resistant bond-wrapping verification information, intelligently controlling and adjusting the mixing proportion of dry and hard fiber concrete fibers of the airport until the multi-type strength inspection verification information and the impact-resistant bond-wrapping verification information reach the set verification standard, and continuously optimizing and enhancing; the mixing ratio of the dry and hard fiber concrete fiber of the airport can be controlled and adjusted to enable the dry and hard fiber concrete to be more suitable for the airport strength inspection and verification standard and obviously improve the performance.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

Claims (10)

1. An automatic control system for the fiber mixing amount of dry and hard fiber concrete in an airport is characterized by comprising:
the fiber detection screening subsystem is used for setting fiber detection selection performance standards of airport dry and hard fiber concrete, performing performance detection on various fibers, screening out synthetic fibers with fiber detection data meeting the airport performance standards, and obtaining screened synthetic fibers;
the fiber filament length segmentation and length fixing subsystem is used for setting the screened synthetic fiber filaments according to fiber dispersibility data and airport pavement slab napping process data and carrying out the fixed-length segmentation treatment on the screened synthetic fibers to obtain segmented fixed-length dry and hard fibers;
the primary setting mixing intelligent mixing subsystem is used for carrying out primary setting on the mixing amount ratio between the segmented fixed-length dry hard fibers and the cement concrete, detecting the state of the primary mixing mixture, and intelligently controlling the mixing process of the fiber concrete to obtain a primary setting mixing control fiber concrete mixture;
And the fiber mixing amount automatic control subsystem prepares the initially designed and controlled fiber concrete mixture into a dry hard fiber concrete mixture test block and performs multi-type strength test verification, intelligently judges whether the multi-type strength test verification information accords with the dry hard fiber concrete strength test verification standard of the airport, and intelligently controls and adjusts the mixing amount ratio of the dry hard fiber concrete fibers of the airport.
2. The automatic control system for the fiber mixing amount of the dry and hard fiber concrete of an airport according to claim 1, wherein the fiber detection and screening subsystem comprises:
the fiber detection selection standard subsystem is used for setting fiber detection selection performance standards of the airport dry and hard fiber concrete according to the technical requirement information of the airport cement concrete surface layer;
the fiber performance detection subsystem is used for selecting performance standards according to fiber detection, performing performance detection on the multiple fibers and acquiring fiber detection data;
the high-strength fiber screening subsystem screens out synthetic fibers with fiber detection data meeting airport performance standards according to the fiber detection data, and acquires the screened synthetic fibers;
the fiber detection selection performance criteria include: tensile strength standard, alkali resistance standard, deformability standard, adhesive strength standard, self-dispersibility standard, safety standard and thickness standard; synthetic fibers meeting airport performance criteria include: high-strength modified polyester fiber, polyvinyl alcohol fiber or alkali-resistant glass fiber.
3. The automatic control system for the fiber mixing amount of the dry and hard fiber concrete of an airport according to claim 1, wherein the fiber filament length segmentation and length fixing subsystem comprises:
the information acquisition data reading subsystem acquires fiber dispersion data through fiber parameter information acquisition; acquiring airport runway panel roughening procedure data through front end procedure data reading;
the fiber filament length setting subsystem is used for setting the screened synthetic fiber filament length according to the fiber dispersibility data and the airport runway panel napping process data;
and the fiber fixed-length segmentation processing subsystem is used for carrying out fixed-length segmentation processing on the screened synthetic fiber according to the screened synthetic fiber length to obtain segmented fixed-length dry and hard fibers.
4. An automated airport dry fiber concrete fiber blend control system of claim 1, wherein the pre-set and intelligent blend subsystem comprises:
the primary setting and mixing amount proportioning subsystem is used for carrying out primary setting on the mixing amount proportioning between the segmented fixed-length dry hard fiber and the cement concrete according to the airport cement concrete experience parameters, so as to obtain primary setting and mixing amount proportioning information;
the initial mixing state detection subsystem is used for carrying out initial mixing of the dry hard fibers and the cement concrete according to the initial setting and mixing amount proportioning information to obtain an initial mixing mixture; detecting the state of the initial mixture;
The mixing and blending quantity initial control subsystem is used for intelligently controlling the mixing process of the fiber concrete according to the state of the initial mixing and blending material, gradually adjusting the mixing and blending quantity ratio and obtaining the initially designed mixing and controlling fiber concrete mixture;
the primary setting and mixing amount proportioning information comprises: the mixing amount of the synthetic fiber is 1.0kg/m 3 The mixing amount of the synthetic fiber is 1.2kg/m 3 The mixing amount of the synthetic fiber is 1.4kg/m 3 The mixing amount of the synthetic fiber is 1.6kg/m 3 ；
Detecting the initial mix state includes: detecting the fluidity of the mixture by a wibro consistometer; intelligently judging whether the flowability of the mixture meets the flowability setting standard of the mixture; the mix flowability setting criteria included: the fluidity and slump of the mixture are less than 20mm, and the Vibrio consistency value is more than 15s.
5. An automatic control system for fiber doping amount of airport dry fiber concrete according to claim 1, wherein the automatic control subsystem for fiber doping amount comprises:
the mixture test block subsystem is used for preparing a dry hard fiber concrete mixture test block from the initially designed and controlled fiber concrete mixture;
the intelligent judging subsystem for checking and verifying performs multi-type strength checking and verifying on the dry and hard fiber concrete mixture test block to obtain multi-type strength checking and verifying information; intelligently judging whether the multi-type strength test verification information accords with the strength test verification standard of the airport dry hard fiber concrete, and acquiring a multi-type strength test verification judgment result;
The fiber proportion automatic control subsystem intelligently controls and adjusts the mixing proportion of dry and hard fiber concrete fibers of the airport according to the multi-type strength inspection verification judging result;
the dry and hard fiber concrete mixture test block comprises: early stage anti-cracking plane sheet test block, flexural strength test block and freeze thawing resistance test block.
6. An automatic control method for the fiber mixing amount of airport dry hard fiber concrete is characterized by comprising the following steps:
s100, setting a fiber detection selection performance standard of airport dry and hard fiber concrete, performing performance detection on various fibers, screening out synthetic fibers with fiber detection data meeting the airport performance standard, and obtaining screened synthetic fibers;
s200, setting the filament length of the screened synthetic fiber and carrying out fixed-length segmentation treatment on the screened synthetic fiber according to fiber dispersibility data and airport pavement slab roughening procedure data to obtain segmented fixed-length dry and hard fibers;
s300, preliminarily setting the mixing ratio between the segmented fixed-length dry hard fibers and the cement concrete, detecting the state of the initial mixing mixture, and intelligently controlling the mixing process of the fiber concrete to obtain the initial mixing control fiber concrete mixture;
s400, preparing the initially-designed and controlled fiber concrete mixture into a dry hard fiber concrete mixture test block, performing multi-type strength test and verification, intelligently judging whether the multi-type strength test and verification information meets the strength test and verification standard of the dry hard fiber concrete of the airport, and intelligently controlling and adjusting the mixing ratio of the dry hard fiber concrete fiber of the airport.
7. The automatic control method for the fiber mixing amount of the dry hard fiber concrete for the airport according to claim 6, wherein the step S100 comprises the following steps:
s101, setting a fiber detection selection performance standard of airport dry fiber concrete according to technical requirement information of an airport cement concrete surface layer;
s102, selecting performance standards according to fiber detection, performing performance detection on various fibers, and obtaining fiber detection data;
s103, screening out synthetic fibers with fiber detection data meeting airport performance standards according to the fiber detection data, and obtaining screened synthetic fibers;
the fiber detection selection performance criteria include: tensile strength standard, alkali resistance standard, deformability standard, adhesive strength standard, self-dispersibility standard, safety standard and thickness standard; synthetic fibers meeting airport performance criteria include: high-strength modified polyester fiber, polyvinyl alcohol fiber or alkali-resistant glass fiber.
8. The automatic control method for the fiber mixing amount of the dry hard fiber concrete for the airport according to claim 6, wherein the step S200 comprises the steps of:
s201, acquiring fiber dispersibility data through fiber parameter information acquisition; acquiring airport runway panel roughening procedure data through front end procedure data reading;
S202, setting the filament length of the screened synthetic fiber according to fiber dispersibility data and airport pavement slab roughening procedure data;
s203, carrying out fixed-length segmentation treatment on the screened synthetic fibers according to the screened synthetic fiber length to obtain segmented fixed-length dry and hard fibers.
9. The automatic control method for the fiber mixing amount of the dry hard fiber concrete for the airport according to claim 6, wherein the step S300 comprises the following steps:
s301, preliminarily setting the mixing amount ratio between the segmented fixed-length dry hard fiber and the cement concrete according to airport cement concrete empirical parameters, and obtaining initial setting and mixing amount ratio information;
s302, carrying out initial mixing of the dry hard fibers and the cement concrete according to the initial setting and mixing amount proportioning information to obtain an initial mixing mixture; detecting the state of the initial mixture;
s303, intelligently controlling the mixing process of the fiber concrete according to the state of the initial mixing mixture, and gradually adjusting the mixing blending ratio to obtain the initial mixing control fiber concrete mixture;
the primary setting and mixing amount proportioning information comprises: the mixing amount of the synthetic fiber is 1.0kg/m 3 The mixing amount of the synthetic fiber is 1.2kg/m 3 The mixing amount of the synthetic fiber is 1.4kg/m 3 The mixing amount of the synthetic fiber is 1.6kg/m 3 ；
Detecting the initial mix state includes: detecting the fluidity of the mixture by a wibro consistometer; intelligently judging whether the flowability of the mixture meets the flowability setting standard of the mixture; the mix flowability setting criteria included: the fluidity and slump of the mixture are less than 20mm, and the Vibrio consistency value is more than 15s.
10. The automatic control method for the fiber mixing amount of the dry hard fiber concrete for the airport according to claim 6, wherein the step S400 comprises the following steps:
s401, preparing a dry hard fiber concrete mixture test block from the initially-arranged and controlled fiber concrete mixture;
s402, performing multi-type strength test verification on the dry and hard fiber concrete mixture test block to obtain multi-type strength test verification information; intelligently judging whether the multi-type strength test verification information accords with the strength test verification standard of the airport dry hard fiber concrete, and acquiring a multi-type strength test verification judgment result;
s403, intelligently controlling and adjusting the mixing ratio of the dry and hard fiber concrete fibers of the airport according to the multi-type strength test verification judgment result;
the dry and hard fiber concrete mixture test block comprises: early stage anti-cracking plane sheet test block, flexural strength test block and freeze thawing resistance test block.
CN202311801409.9A 2023-12-26 2023-12-26 Airport dry hard fiber concrete fiber blending amount automatic control system and method Active CN117532741B (en)

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