CN117074164A - Dry-hard concrete detection method and system for water conservancy construction site - Google Patents
Dry-hard concrete detection method and system for water conservancy construction site Download PDFInfo
- Publication number
- CN117074164A CN117074164A CN202310679497.3A CN202310679497A CN117074164A CN 117074164 A CN117074164 A CN 117074164A CN 202310679497 A CN202310679497 A CN 202310679497A CN 117074164 A CN117074164 A CN 117074164A
- Authority
- CN
- China
- Prior art keywords
- test piece
- concrete test
- concrete
- diameter
- testing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004567 concrete Substances 0.000 title claims abstract description 234
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 238000001514 detection method Methods 0.000 title claims abstract description 16
- 238000012360 testing method Methods 0.000 claims abstract description 294
- 238000000034 method Methods 0.000 claims abstract description 204
- 230000035515 penetration Effects 0.000 claims abstract description 34
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004891 communication Methods 0.000 description 8
- 238000002474 experimental method Methods 0.000 description 8
- 230000006870 function Effects 0.000 description 8
- 239000000463 material Substances 0.000 description 7
- 238000012545 processing Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000010998 test method Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000005553 drilling Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- 239000004568 cement Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 241000607598 Vibrio Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 239000004566 building material Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000012669 compression test Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000007585 pull-off test Methods 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0016—Tensile or compressive
- G01N2203/0019—Compressive
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The application discloses a method and a system for detecting dry and hard concrete of a water conservancy construction site, wherein the method comprises the following steps: acquiring relevant parameter information of a concrete test piece, wherein the relevant parameter information comprises the strength grade and the measuring point diameter of the concrete test piece; according to the strength grade of the concrete test piece, if the strength grade is not greater than a preset first strength grade threshold value, selecting a first method for testing the compressive strength of the concrete test piece, wherein the first method comprises at least one of a needle penetration method and a pull-out method; and according to the diameter of the measuring point of the concrete test piece, if the diameter of the measuring point is not larger than a preset diameter threshold, selecting a second method for testing the compressive strength of the concrete test piece, wherein the second method is at least one of the first methods for removing the pull-out method. Through the technical scheme provided by the application, the method has the effect of conveniently selecting a proper detection method to improve the accuracy of detecting the compressive capacity of the dry and hard concrete.
Description
Technical Field
The application relates to the technical field of concrete detection, in particular to a method and a system for detecting dry and hard concrete in a water conservancy construction site.
Background
The dry and hard concrete is concrete with less cement or mortar content, more coarse aggregate, lower water cement and 20-11 s of Vibrio consistency. When in construction, strong vibration is needed to be compact, otherwise, more pores are easy to generate to influence the quality of concrete. The dry and hard concrete is an important building material in hydraulic engineering, however, the detection process of the material is not perfect because the material has short appearance time.
According to the research on dry and hard concrete at home and abroad, most of the current research is focused on the preparation and improvement modes of the material, and less is focused on the detection and quality experiments. In addition, hydraulic engineering is one of the important application fields of dry-hard concrete, but the dry-hard concrete detection technology in the field still has a large blank at present. The method for detecting the dry-hard concrete on the water conservancy construction site is various, but the method for detecting the compressive resistance of the dry-hard concrete is specifically adopted for the dry-hard concrete with different strength grades so as to improve the detection accuracy, and further measurement is needed.
Therefore, there is a need for a method and system for testing dry and hard concrete in a water conservancy construction site to facilitate the selection of an appropriate testing method to improve the accuracy of testing the compressive capacity of dry and hard concrete.
Disclosure of Invention
The application provides a method and a system for detecting dry and hard concrete on a water conservancy construction site, which have the effect of conveniently selecting a proper detection method to improve the accuracy of detecting the compression resistance of the dry and hard concrete.
In a first aspect, the application provides a method for detecting dry and hard concrete on a water conservancy construction site, comprising the following steps:
acquiring relevant parameter information of a concrete test piece, wherein the relevant parameter information comprises the strength grade and the measuring point diameter of the concrete test piece;
according to the strength grade of the concrete test piece, if the strength grade is not greater than a preset first strength grade threshold value, selecting a first method for testing the compressive strength of the concrete test piece, wherein the first method comprises at least one of a needle penetration method and a pull-out method;
and according to the diameter of the measuring point of the concrete test piece, if the diameter of the measuring point is not larger than a preset diameter threshold, selecting a second method for testing the compressive strength of the concrete test piece, wherein the second method is at least one of the first methods for removing the pull-out method.
By adopting the technical scheme, the method for automatically selecting the proper testing method to test the compressive strength of the concrete test piece according to the strength grade and the diameter of the measuring point of the concrete test piece is provided. And whether the intensity level and the diameter of the measuring point are suitable for different testing methods is judged through a preset threshold value, so that the accuracy and the reliability of the test are effectively improved. Meanwhile, the operation difficulty of the testers is reduced, and the testing efficiency is improved. Therefore, there is an effect that it is convenient to select an appropriate detection method to improve accuracy in detecting the compressive capacity of dry hard concrete.
Optionally, the selecting the first method for testing the compressive strength of the concrete test piece includes:
obtaining the cross-sectional area of the concrete test piece according to the diameter of the measuring point of the concrete test piece;
obtaining information of maximum bearing pressure of a concrete test piece tested by a first method;
and testing and obtaining the maximum bearing pressure information of the concrete test piece and the cross-sectional area of the concrete test piece based on the first method, and obtaining the compressive strength of the concrete test piece.
By adopting the technical scheme, the cross-sectional area of the concrete test piece is obtained according to the diameter of the measuring point of the concrete test piece, the maximum bearing pressure information of the concrete test piece tested by the first method is obtained, the maximum bearing pressure information of the concrete test piece and the cross-sectional area of the concrete test piece are obtained based on the first method, and the compressive strength of the concrete test piece is obtained. The method is simple and feasible, can rapidly measure the compressive strength of the concrete test piece, and improves the testing efficiency and accuracy.
Optionally, the diameter of the measuring point of the concrete test piece is obtained according to the following first formula:
1.D i =(D 1 +D 2 )/2；
2. wherein D is i Mean average diameter of the ith specimen; d (D) 1 And D 2 The concrete test pieces are respectively arranged at two partsDiameters in mutually perpendicular directions;
3. and obtaining the cross-sectional area of the concrete test piece according to the diameter of the measuring point of the concrete test piece, and according to the following second formula:
4.A=πD i* D i /4；
5. wherein A refers to the cross-sectional area of the concrete test piece;
6. the maximum bearing pressure information of the concrete test piece and the cross-sectional area of the concrete test piece are obtained based on the first method, and the method is according to the following third formula: f=f/a;
7. wherein F is the maximum bearing pressure, and F is the compressive strength of the concrete test piece.
By adopting the technical scheme, the method for obtaining the maximum bearing pressure information of the concrete test piece and the cross-sectional area of the concrete test piece based on the first method test and then calculating the compressive strength of the concrete test piece according to the formula. The method can accurately calculate the compressive strength of the concrete test piece, and improves the reliability of the test result. Meanwhile, the formula calculation method is simple and easy to operate, and the test efficiency can be effectively improved.
Optionally, the related parameter information further comprises an expected value of invalid test times of the concrete test piece;
according to the expected value of the invalid test times of the concrete test piece;
if the expected value of the invalid test times is not greater than the preset time threshold, selecting a first method to test the compressive strength of the concrete test piece;
and if the expected value of the invalid test times is larger than the preset time threshold, selecting a third method for testing the compressive strength of the concrete test piece, wherein the third method is at least one of the first methods for removing the needle penetration method.
By adopting the technical scheme, whether the expected value of the invalid test times is larger than the threshold value is judged through the preset times threshold value, so that the compressive strength of the concrete test piece is tested by selecting the first method or the third method. The method can effectively reduce the ineffective times of the concrete test piece test and improve the test efficiency and accuracy. Meanwhile, the testing method can be flexibly selected according to actual conditions, and the testing reliability is improved.
Optionally, the selecting the first/second method for testing the compressive strength of the concrete test piece includes:
if the strength grade is greater than a preset second strength grade threshold value, selecting a pressurizing speed with the loading speed of 0.5-0.7 MPa/s to test the compressive strength of the concrete test piece, wherein the second strength grade threshold value is smaller than the first strength grade threshold value;
and if the strength grade is not greater than a preset second strength grade threshold, selecting a pressurizing speed with the loading speed of 0.3-0.5 MPa/s to test the compressive strength of the concrete test piece.
By adopting the technical scheme, the strength grade of the concrete test piece is judged through the preset first strength grade threshold value and the preset second strength grade threshold value, so that a proper test method and loading speed are selected. The method can flexibly select the test method and the loading speed according to different strength grades of the concrete test piece, and improves the accuracy and the reliability of the test result. Meanwhile, the method can also follow related standards and specifications, and ensure the validity and comparability of the test result.
Optionally, the selecting the third method for testing the compressive strength of the concrete test piece includes:
after the fixing of the concrete test piece is completed, the concrete test piece is uniformly loaded at a speed of 135 to 255N/s.
Through adopting above-mentioned technical scheme, when selecting the compressive strength of third method test concrete sample, through the fixed mode that accomplishes the back to the concrete sample, evenly add the load to the concrete sample with certain speed and test. The method can accurately measure the compressive strength of the concrete test piece, can avoid some defects and limitations in the needle penetration method, and improves the reliability and accuracy of the test result.
Optionally, selecting the first method to test the compressive strength of the concrete test piece further comprises:
the pull-out method and the needle penetration method are used for staggering the same number of measuring points on the concrete test piece.
By adopting the technical scheme, more measuring points can be arranged on the concrete test piece by the method, and the accuracy and the reliability of the test are improved. Meanwhile, the staggered use of the pull-out method and the needle penetration method can avoid the limitation and the defect of a single test method and improve the reliability and the accuracy of the test result. Therefore, the method can effectively improve the test quality and the test efficiency of the concrete test piece.
In a second aspect of the application there is provided a dry hard concrete inspection system for a water conservancy construction site, the system comprising:
the acquisition module is used for acquiring the related parameter information of the concrete test piece, wherein the related parameter information comprises the strength grade and the measuring point diameter of the concrete test piece;
the method configuration module is used for selecting a first method to test the compressive strength of the concrete test piece according to the strength grade of the concrete test piece, and if the strength grade is not greater than a preset first strength grade threshold value, wherein the first method comprises at least one of a needle penetration method and a pull-out method;
the method configuration module is further used for selecting a second method to test the compressive strength of the concrete test piece according to the diameter of the measuring point of the concrete test piece, if the diameter of the measuring point is not larger than a preset diameter threshold value, wherein the second method is at least one of the first method of removing the pull-out method.
By adopting the technical scheme, the method for automatically selecting the proper testing method to test the compressive strength of the concrete test piece according to the strength grade and the diameter of the measuring point of the concrete test piece is provided. And whether the intensity level and the diameter of the measuring point are suitable for different testing methods is judged through a preset threshold value, so that the accuracy and the reliability of the test are effectively improved. Meanwhile, the operation difficulty of the testers is reduced, and the testing efficiency is improved. Therefore, there is an effect that it is convenient to select an appropriate detection method to improve accuracy in detecting the compressive capacity of dry hard concrete.
In a third aspect of the application there is provided an electronic device comprising a processor, a memory for storing instructions, a user interface and a network interface for communicating to other devices, the processor being arranged to execute the instructions stored in the memory to cause the electronic device to perform the method of any of the first aspects above.
In a fourth aspect of the application there is provided a computer readable storage medium storing instructions which, when executed, perform the method steps of any of the first aspects above.
In summary, one or more technical solutions provided in the embodiments of the present application at least have the following technical effects or advantages:
1. the technical scheme provides a method for automatically selecting a proper testing method to test the compressive strength of a concrete test piece according to the strength grade and the diameter of a measuring point of the concrete test piece. And whether the intensity level and the diameter of the measuring point are suitable for different testing methods is judged through a preset threshold value, so that the accuracy and the reliability of the test are effectively improved. Meanwhile, the operation difficulty of the testers is reduced, and the testing efficiency is improved. Therefore, there is an effect that it is convenient to select an appropriate detection method to improve accuracy in detecting the compressive capacity of dry hard concrete.
2. Obtaining the cross-sectional area of the concrete test piece according to the diameter of the measuring point of the concrete test piece, obtaining the maximum bearing pressure information of the concrete test piece tested by the first method, obtaining the maximum bearing pressure information of the concrete test piece and the cross-sectional area of the concrete test piece based on the first method, and obtaining the compressive strength of the concrete test piece. The method is simple and feasible, can rapidly measure the compressive strength of the concrete test piece, and improves the testing efficiency and accuracy.
Drawings
Fig. 1 is a schematic flow chart of a method for detecting dry and hard concrete in a water conservancy construction site according to an embodiment of the application.
Fig. 2 is a schematic diagram of the placement positions of the measuring points of the dry and hard concrete test piece according to the embodiment of the application.
Fig. 3 is a schematic structural diagram of a dry hard concrete detection system for a water conservancy construction site according to an embodiment of the present application.
Fig. 4 is a schematic structural diagram of an electronic device according to the disclosure.
Reference numerals illustrate: 1. an acquisition module; 2. a method configuration module; 600. an electronic device; 601. a processor; 602. a communication bus; 603. a user interface; 604. a network interface; 605. a memory.
Detailed Description
In order that those skilled in the art will better understand the technical solutions in the present specification, the technical solutions in the embodiments of the present specification will be clearly and completely described below with reference to the drawings in the embodiments of the present specification, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments.
In describing embodiments of the present application, words such as "for example" or "for example" are used to mean serving as examples, illustrations, or descriptions. Any embodiment or design described herein as "such as" or "for example" in embodiments of the application should not be construed as preferred or advantageous over other embodiments or designs. Rather, the use of words such as "or" for example "is intended to present related concepts in a concrete fashion.
In the description of embodiments of the application, the term "plurality" means two or more. For example, a plurality of systems means two or more systems, and a plurality of screen terminals means two or more screen terminals. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating an indicated technical feature. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless expressly specified otherwise.
Before describing embodiments of the present application, some terms involved in the embodiments of the present application will be first defined and described.
Dry hard concrete: the concrete has low water content, small slump and rough surface. After concrete placement, the surface of the concrete forms a crust due to the low water content, which makes it difficult to leave a fingerprint or other imprint on the surface. Meanwhile, due to small slump, the fluidity and plasticity of the concrete are poor, and the compactness and strength of the concrete are ensured by measures such as vibration and compaction. Dry hard concrete is often used in projects requiring higher strength and durability, such as bridges, high-rise buildings, and the like.
Needle penetration method: the needle penetration method of concrete is a common method for testing the compressive strength of concrete. The method comprises the steps of puncturing the surface of a concrete sample by using a needle with a specified diameter, and calculating the compressive strength of the concrete according to parameters such as the puncturing depth, the shape and the size of the needle and the like. The needle penetration method is a simple, quick and economical test method, and is suitable for on-site quick test and mass test.
Pulling-off method: the pull-off method of concrete is a common method for testing the tensile strength of concrete. The method comprises the steps of drilling holes on the surface of a concrete test piece, applying tension by installing a tension meter in the holes, and finally calculating the tensile strength of the concrete test piece.
The application provides a method and a system for detecting dry and hard concrete of a water conservancy construction site, and referring to fig. 1, fig. 1 is a first flow schematic diagram of the method for detecting dry and hard concrete of the water conservancy construction site according to an embodiment of the application. The method for detecting the dry-hard concrete of the water conservancy construction site is applied to a server and comprises the following steps of S100 to S500:
step S100: and acquiring relevant parameter information of the concrete test piece, wherein the relevant parameter information comprises the strength grade and the measuring point diameter of the concrete test piece.
Step S200: and judging whether the strength grade of the concrete test piece is not more than a preset first strength grade threshold value.
Step S300: if yes, selecting a first method to test the compressive strength of the concrete test piece, wherein the first method comprises at least one of a needle penetration method and a pull-out method; if not, selecting other methods besides the first method to test the compressive strength of the concrete test piece.
Step S400: judging whether the diameter of the measuring point of the concrete test piece is not larger than a preset diameter threshold value.
Step S500: if so, selecting a second method for testing the compressive strength of the concrete test piece, wherein the second method is at least one of the first methods for removing the pull-off method; if not, the first method is still selected to test the compressive strength of the concrete test piece.
Specifically, the strength grade of the concrete test piece may be C15, C20, C25, C30, C35, and C40. The age of the concrete test pieces may be 7 days, 14 days, 28 days, 60 days, and 180 days inclusive. The diameter of the measuring point can be 40mm, 42mm, 44mm, 46mm and the like. According to step S200, the preset first strength threshold may be C30, and it is known through the study of the prior art that the concrete test piece with compressive strength of C30 or below may be tested by a first method, which includes a needle penetration method, a pull-off method, and the like, and the concrete test piece with compressive strength of C30 or above may be tested by a method other than the needle penetration method and the pull-off method, because the error of the compressive strength test of the concrete test piece with compressive strength of C30 or above applied by the needle penetration method and the pull-off method is larger. In the scheme, the experiment is carried out only by adopting a needle penetration method and a pull-out method. As shown by the research of the prior experimental technology, the average error of the needle penetration method is 10.3 percent, and the average error of the pull-off method is 13.5 percent. The results indicate that in practical detection, the fitting accuracy of the needle penetration method is better than that of the pull-out method. The experiment shows that the result is that the diameter of the measuring point of the pull-out method is 44mm and is higher than that of the needle penetration method, so that the test result is easy to have errors when being influenced by the external environment. In contrast, the needle penetration method has higher test speed and less damage to the test piece, so that the test result is more accurate. Thus, in this scenario, the preset diameter threshold may be 44mm.
In other embodiments, selecting the first method to test the compressive strength of the concrete test piece comprises:
obtaining the cross-sectional area of the concrete test piece according to the diameter of the measuring point of the concrete test piece;
obtaining information of maximum bearing pressure of a concrete test piece tested by a first method;
and testing and obtaining the maximum bearing pressure information of the concrete test piece and the cross-sectional area of the concrete test piece based on the first method, and obtaining the compressive strength of the concrete test piece.
Specifically, the diameter of a measuring point of a concrete test piece is obtained according to the following first formula:
D i =(D 1 +D 2 )/2
wherein D is i Mean diameter of the ith specimen, the data is accurate to 0.1mm; d (D) 1 And D 2 The diameters of the concrete test pieces in two mutually perpendicular directions are respectively;
and obtaining the cross-sectional area of the concrete test piece according to the diameter of the measuring point of the concrete test piece, and according to the following second formula:
8.A=πD i* D i /4；
wherein A is the cross-sectional area of the concrete specimen, and the data is accurate to 0.1mm 2 ；
And testing and obtaining the maximum bearing pressure information of the concrete test piece and the cross-sectional area of the concrete test piece based on the first method, and according to the following third formula:
f=F/A；
wherein F is the maximum bearing pressure, and F is the compressive strength of the concrete test piece.
For example, D 1 And D 2 The values of F are respectively 40mm and 42mm, and the value of F is 1000N; then get D according to the first formula i The value of (2) is 41mm; according to the second formula, the value of A is 1320mm 2 The method comprises the steps of carrying out a first treatment on the surface of the According to the third formula, f is 0.758N/mm 2 。
In other embodiments, the related parameter information further includes an expected value of an invalid test number of the concrete test piece;
according to the expected value of the invalid test times of the concrete test piece;
if the expected value of the invalid test times is not greater than the preset time threshold, selecting a first method to test the compressive strength of the concrete test piece;
and if the expected value of the invalid test times is larger than the preset time threshold, selecting a third method for testing the compressive strength of the concrete test piece, wherein the third method is at least one of the first methods for removing the needle penetration method.
In particular, it is known from the studies of the prior art that the inefficiency of material data of different intensities is different. A total of 432 data were collected for the pull-off test, 408 of which were valid, with an approximately 95% data efficiency. The invalid data of each group of concrete test pieces in the experiment are distributed uniformly, and no obvious change trend is shown. The number of invalid data in each group is 2 to 5, and no obvious correlation exists between the number of invalid measuring points and the material strength of the dry and hard concrete. Unlike pull-off experiments, the invalid data of needle penetration shows a clear trend, and the amount of invalid data increases with increasing material strength. The number of invalid measuring points reaches 20, and the number of the invalid measuring points accounts for 4.6% of the total experimental data. The preset frequency threshold may be 15 times, and when the number of invalid experiments is required to be not more than 15 times, the pull-off method is selected to be more suitable, and the obtained number of invalid experiments is less.
In other embodiments, selecting the first/second method to test the compressive strength of the concrete test piece comprises:
if the strength grade is greater than a preset second strength grade threshold, selecting a pressurizing speed with the loading speed of 0.5-0.7 MPa/s to test the compressive strength of the concrete test piece, wherein the second strength grade threshold is smaller than the first strength grade threshold;
and if the strength grade is not greater than a preset second strength grade threshold, selecting a pressurizing speed with the loading speed of 0.3-0.5 MPa/s to test the compressive strength of the concrete test piece.
In other embodiments, selecting the third method to test the compressive strength of the concrete test piece comprises:
after the fixing of the concrete test piece is completed, the concrete test piece is uniformly loaded at a speed of 135 to 255N/s.
In other embodiments, selecting the first method to test the compressive strength of the concrete test piece further comprises:
the pull-out method and the needle penetration method are used for staggering the same number of measuring points on the concrete test piece.
In practical application, the compressive capacity of a dry and hard concrete test piece is tested first. The dry and hard concrete precast block is placed in a standard curing environment with the temperature of 18 to 22 ℃ and the relative humidity of more than 90 percent, and then the concrete test piece is taken out before the compression test is performed for 48 hours. And drilling the precast block by using an engineering driller, and grinding the core sample taken out by drilling by using a rock core sample cutting machine and a rock double-end-face grinding machine. The surface of the ground test piece should not be cracked, and no holes and faults are needed. In addition, the perpendicularity deviation of the core sample end face and the axial center line cannot be larger than 1, and the core sample height-diameter ratio should be 0.98 to 1.02. The prepared core sample test piece is soaked in clear water at 15-25 ℃ for 48 hours, and the test operation is carried out immediately after the core sample test piece is taken out. For test pieces having a compressive strength grade of C25 or less, the loading speed is 0.3 to 0.5MPa/s, and for test pieces having a compressive strength grade of C25 or more, the loading speed is 0.5 to 0.7MPa/s. After the test piece is pressurized until it is broken, the breaking limit load data of the test piece is used to evaluate the compressive capacity of the dry hard concrete test piece. The compressive capacity of a concrete test piece is the ratio of the maximum pressure that the core sample test piece can withstand in a compressive test to the compressive cross-sectional area, and this ratio is referred to as the concrete compressive strength value.
And the next step is to test a dry and hard concrete test piece by adopting a needle penetration method. The prefabricated blocks of different ages are taken out 48 hours in advance first, and soaked in clear water at 15-25 ℃ for 48 hours. Different ages should include 3 days, 7 days, 14 days, 28 days, 60 days, 90 days, 180 days and 360 days. In order to prevent the material from being wasted due to the displacement of the test piece in the penetration process, the test piece is fixed on the experimental platform by fastening. The stations are then placed on the prefabricated blocks in the manner shown in fig. 2. The number of the measuring points is 6, 3 of the measuring points are used for needle penetration experiments, and the other measuring points are used for pull-off method tests of the next step. After the setting is completed, the fact that the surface of the dry and hard concrete in the test range cannot have obvious non-compact areas needs to be further confirmed, and the detection surface needs to be as flat as possible. After the preparation, the needle penetration type concrete strength is detected according to a fixed procedure. The penetrating detector is used for inserting the measuring nail into the penetrating rod base, so that the nail tip is outwards ensured. Then installing a force applying lever and a hook, and penetrating the measuring nail into the concrete at the selected position of the test piece. After the completion of the penetration, the measuring nail was pulled out, and the dust in the penetration hole was cleaned with a blower. Finally, the penetration depth of each measurement hole was measured in turn and recorded with an accuracy of 0.01 mm.
Referring to fig. 3, the present application also provides a system for detecting dry and hard concrete in a water conservancy construction site, comprising: the acquisition module 1 is used for acquiring relevant parameter information of the concrete test piece, wherein the relevant parameter information comprises the strength grade and the measuring point diameter of the concrete test piece;
the method configuration module 2 is used for selecting a first method to test the compressive strength of the concrete test piece according to the strength grade of the concrete test piece, and the first method comprises at least one of a needle penetration method and a pull-out method if the strength grade is not greater than a preset first strength grade threshold value;
the method configuration module 2 is further configured to select a second method to test the compressive strength of the concrete test piece according to the diameter of the measuring point of the concrete test piece, if the diameter of the measuring point is not greater than a preset diameter threshold, wherein the second method is at least one of the first methods of removing the pull-out method.
It should be noted that: in the device provided in the above embodiment, when implementing the functions thereof, only the division of the above functional modules is used as an example, in practical application, the above functional allocation may be implemented by different functional modules according to needs, that is, the internal structure of the device is divided into different functional modules, so as to implement all or part of the functions described above. In addition, the embodiments of the apparatus and the method provided in the foregoing embodiments belong to the same concept, and specific implementation processes of the embodiments of the method are detailed in the method embodiments, which are not repeated herein.
The application also discloses electronic equipment. Referring to fig. 4, fig. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present disclosure. The electronic device 600 may include: at least one processor 601, at least one network interface 604, a user interface 603, a memory 605, at least one communication bus 602.
Wherein the communication bus 602 is used to enable connected communications between these components.
The user interface 603 may include a Display screen (Display), a Camera (Camera), and the optional user interface 603 may further include a standard wired interface, a wireless interface.
The network interface 604 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), among others.
Wherein the processor 601 may include one or more processing cores. The processor 601 connects various portions of the overall server using various interfaces and lines, performs various functions of the server and processes data by executing or executing instructions, programs, code sets, or instruction sets stored in the memory 605, and invoking data stored in the memory 605. Alternatively, the processor 601 may be implemented in hardware in at least one of digital signal processing (Digital Signal Processing, DSP), field programmable gate array (Field-Programmable Gate Array, FPGA), programmable logic array (Programmable Logic Array, PLA). The processor 601 may integrate one or a combination of several of a central processing unit (Central Processing Unit, CPU), an image processor (Graphics Processing Unit, GPU), and a modem, etc. The CPU mainly processes an operating system, a user interface, an application program and the like; the GPU is used for rendering and drawing the content required to be displayed by the display screen; the modem is used to handle wireless communications. It will be appreciated that the modem may not be integrated into the processor 601 and may be implemented by a single chip.
The Memory 605 may include a random access Memory (Random Access Memory, RAM) or a Read-Only Memory (Read-Only Memory). Optionally, the memory 605 includes a non-transitory computer readable medium (non-transitory computer-readable storage medium). Memory 605 may be used to store instructions, programs, code, sets of codes, or sets of instructions. The memory 605 may include a stored program area and a stored data area, wherein the stored program area may store instructions for implementing an operating system, instructions for at least one function (such as a touch function, a sound playing function, an image playing function, etc.), instructions for implementing the various method embodiments described above, etc.; the storage data area may store data or the like involved in the above respective method embodiments. The memory 605 may also optionally be at least one storage device located remotely from the processor 601. Referring to fig. 4, an operating system, a network communication module, a user interface module, and an application program of a dry hard concrete inspection method of a hydraulic construction site may be included in a memory 605 as a computer storage medium.
In the electronic device 600 shown in fig. 4, the user interface 603 is mainly used for providing an input interface for a user, and acquiring data input by the user; and processor 601 may be used to invoke an application program in memory 605 that stores a method for dry hard concrete testing of a water conservancy construction site, which when executed by one or more processors 601, causes electronic device 600 to perform the method as described in one or more of the embodiments above. It should be noted that, for simplicity of description, the foregoing method embodiments are all described as a series of acts, but it should be understood by those skilled in the art that the present application is not limited by the order of acts described, as some steps may be performed in other orders or concurrently in accordance with the present application. Further, those skilled in the art will also appreciate that the embodiments described in the specification are all of the preferred embodiments, and that the acts and modules referred to are not necessarily required for the present application.
In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.
In the several embodiments provided by the present application, it should be understood that the disclosed apparatus may be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative, such as a division of units, merely a division of logic functions, and there may be additional divisions in actual implementation, such as multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some service interface, device or unit indirect coupling or communication connection, electrical or otherwise.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable memory. Based on this understanding, the technical solution of the present application may be embodied essentially or in a part contributing to the prior art or in whole or in part in the form of a software product stored in a memory, comprising several instructions for causing a computer device (which may be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method of the various embodiments of the present application. And the aforementioned memory includes: various media capable of storing program codes, such as a U disk, a mobile hard disk, a magnetic disk or an optical disk.
The foregoing is merely exemplary embodiments of the present disclosure and is not intended to limit the scope of the present disclosure. That is, equivalent changes and modifications are contemplated by the teachings of this disclosure, which fall within the scope of the present disclosure. Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure.
This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a scope and spirit of the disclosure being indicated by the claims.
Claims (10)
1. A method for detecting dry and hard concrete of a water conservancy construction site is characterized by comprising the following steps:
acquiring relevant parameter information of a concrete test piece, wherein the relevant parameter information comprises the strength grade and the measuring point diameter of the concrete test piece;
according to the strength grade of the concrete test piece, if the strength grade is not greater than a preset first strength grade threshold value, selecting a first method for testing the compressive strength of the concrete test piece, wherein the first method comprises at least one of a needle penetration method and a pull-out method;
and according to the diameter of the measuring point of the concrete test piece, if the diameter of the measuring point is not larger than a preset diameter threshold, selecting a second method for testing the compressive strength of the concrete test piece, wherein the second method is at least one of the first methods for removing the pull-out method.
2. The method for testing dry hard concrete at a water conservancy construction site according to claim 1, wherein the selecting the first method for testing the compressive strength of the concrete test piece comprises:
obtaining the cross-sectional area of the concrete test piece according to the diameter of the measuring point of the concrete test piece;
obtaining information of maximum bearing pressure of a concrete test piece tested by a first method;
and testing and obtaining the maximum bearing pressure information of the concrete test piece and the cross-sectional area of the concrete test piece based on the first method, and obtaining the compressive strength of the concrete test piece.
3. The method for testing dry and hard concrete at a water conservancy construction site according to claim 2, wherein the diameter of the measuring point of the concrete test piece is obtained according to the following first formula:
D i =(D 1 +D 2 )/2；
wherein D is i Refers to the ith specimenAverage diameter; d (D) 1 And D 2 The diameters of the concrete test pieces in two mutually perpendicular directions are respectively;
and obtaining the cross-sectional area of the concrete test piece according to the diameter of the measuring point of the concrete test piece, and according to the following second formula:
A=πD i* D i /4；
wherein A refers to the cross-sectional area of the concrete test piece;
the maximum bearing pressure information of the concrete test piece and the cross-sectional area of the concrete test piece are obtained based on the first method, and the method is according to the following third formula: f=f/a;
wherein F is the maximum bearing pressure, and F is the compressive strength of the concrete test piece.
4. The method for testing dry and hard concrete at a water conservancy construction site according to claim 1, wherein the related parameter information further comprises an expected value of invalid test times of the concrete test piece;
according to the expected value of the invalid test times of the concrete test piece;
if the expected value of the invalid test times is not greater than the preset time threshold, selecting a first method to test the compressive strength of the concrete test piece;
and if the expected value of the invalid test times is larger than the preset time threshold, selecting a third method for testing the compressive strength of the concrete test piece, wherein the third method is at least one of the first methods for removing the needle penetration method.
5. The method for testing dry hard concrete at a water conservancy construction site according to claim 1, wherein the selecting the first/second method for testing the compressive strength of the concrete test piece comprises:
if the strength grade is greater than a preset second strength grade threshold value, selecting a pressurizing speed with the loading speed of 0.5-0.7 MPa/s to test the compressive strength of the concrete test piece, wherein the second strength grade threshold value is smaller than the first strength grade threshold value;
and if the strength grade is not greater than a preset second strength grade threshold, selecting a pressurizing speed with the loading speed of 0.3-0.5 MPa/s to test the compressive strength of the concrete test piece.
6. The method for testing dry hard concrete at a water conservancy construction site according to claim 4, wherein the selecting a third method for testing the compressive strength of the concrete test piece comprises:
after the fixing of the concrete test piece is completed, the concrete test piece is uniformly loaded at a speed of 135 to 255N/s.
7. The method for testing dry hard concrete at a water conservancy construction site according to claim 1, wherein selecting the first method for testing the compressive strength of the concrete test piece further comprises:
the pull-out method and the needle penetration method are used for staggering the same number of measuring points on the concrete test piece.
8. A dry hard concrete detection system for a water conservancy construction site, the system comprising:
the acquisition module (1) is used for acquiring related parameter information of the concrete test piece, wherein the related parameter information comprises the strength grade and the measuring point diameter of the concrete test piece;
the method configuration module (2) is used for selecting a first method to test the compressive strength of the concrete test piece according to the strength grade of the concrete test piece, and if the strength grade is not greater than a preset first strength grade threshold value, wherein the first method comprises at least one of a needle penetration method and a pull-out method;
the method configuration module (2) is further used for selecting a second method to test the compressive strength of the concrete test piece according to the diameter of the measuring point of the concrete test piece, if the diameter of the measuring point is not larger than a preset diameter threshold value, wherein the second method is at least one of the first methods for removing the pull-out method.
9. An electronic device comprising a processor (601), a memory (605), a user interface (603) and a network interface (604), the memory (605) being configured to store instructions, the user interface (603) and the network interface (604) being configured to communicate to other devices, the processor (601) being configured to execute the instructions stored in the memory (605) to cause the electronic device (600) to perform the method according to any of claims 1-7.
10. A computer readable storage medium storing instructions which, when executed, perform the method steps of any of claims 1-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310679497.3A CN117074164A (en) | 2023-06-08 | 2023-06-08 | Dry-hard concrete detection method and system for water conservancy construction site |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310679497.3A CN117074164A (en) | 2023-06-08 | 2023-06-08 | Dry-hard concrete detection method and system for water conservancy construction site |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117074164A true CN117074164A (en) | 2023-11-17 |
Family
ID=88715924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310679497.3A Pending CN117074164A (en) | 2023-06-08 | 2023-06-08 | Dry-hard concrete detection method and system for water conservancy construction site |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117074164A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1090150A (en) * | 1996-09-13 | 1998-04-10 | Takashi Miura | Method and device for testing concrete by inserting needle into concrete |
| CN112748017A (en) * | 2020-12-28 | 2021-05-04 | 招商局重庆交通科研设计院有限公司 | Method for testing compressive strength of composite structure concrete interface |
| CN114242182A (en) * | 2021-11-10 | 2022-03-25 | 中铁二十局集团有限公司 | Desert sand concrete strength prediction method, device, equipment and storage medium |
| AU2021104161A4 (en) * | 2021-07-15 | 2022-04-28 | Addepalli Mallinadh Kashyap | A method and system for studying the behavior and strength of geopolymer concrete |
| CN114739809A (en) * | 2022-05-17 | 2022-07-12 | 建研院检测中心有限公司 | Method for detecting concrete compressive strength of thin-wall prefabricated part |
| CN114881180A (en) * | 2022-07-11 | 2022-08-09 | 浙江瑞邦科特检测有限公司 | Concrete compressive strength data management method, device, equipment and storage medium |
| CN115144571A (en) * | 2022-04-01 | 2022-10-04 | 中国建材检验认证集团北京天誉有限公司 | Construction site concrete strength detection model establishing method, device, equipment and medium |
| CN115165554A (en) * | 2022-06-13 | 2022-10-11 | 上海建工集团股份有限公司 | Method for rapidly measuring early strength of concrete with different grades |
| CN115389341A (en) * | 2022-08-20 | 2022-11-25 | 北京市建设工程质量第一检测所有限责任公司 | Method for detecting flexural strength of cement concrete pavement |
| US20230160855A1 (en) * | 2021-11-19 | 2023-05-25 | Fdh Infrastructure Services, Llc | Systems and Methods For Estimating Concrete Strength Using Surface Wave Speed |
-
2023
- 2023-06-08 CN CN202310679497.3A patent/CN117074164A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1090150A (en) * | 1996-09-13 | 1998-04-10 | Takashi Miura | Method and device for testing concrete by inserting needle into concrete |
| CN112748017A (en) * | 2020-12-28 | 2021-05-04 | 招商局重庆交通科研设计院有限公司 | Method for testing compressive strength of composite structure concrete interface |
| AU2021104161A4 (en) * | 2021-07-15 | 2022-04-28 | Addepalli Mallinadh Kashyap | A method and system for studying the behavior and strength of geopolymer concrete |
| CN114242182A (en) * | 2021-11-10 | 2022-03-25 | 中铁二十局集团有限公司 | Desert sand concrete strength prediction method, device, equipment and storage medium |
| US20230160855A1 (en) * | 2021-11-19 | 2023-05-25 | Fdh Infrastructure Services, Llc | Systems and Methods For Estimating Concrete Strength Using Surface Wave Speed |
| CN115144571A (en) * | 2022-04-01 | 2022-10-04 | 中国建材检验认证集团北京天誉有限公司 | Construction site concrete strength detection model establishing method, device, equipment and medium |
| CN114739809A (en) * | 2022-05-17 | 2022-07-12 | 建研院检测中心有限公司 | Method for detecting concrete compressive strength of thin-wall prefabricated part |
| CN115165554A (en) * | 2022-06-13 | 2022-10-11 | 上海建工集团股份有限公司 | Method for rapidly measuring early strength of concrete with different grades |
| CN114881180A (en) * | 2022-07-11 | 2022-08-09 | 浙江瑞邦科特检测有限公司 | Concrete compressive strength data management method, device, equipment and storage medium |
| CN115389341A (en) * | 2022-08-20 | 2022-11-25 | 北京市建设工程质量第一检测所有限责任公司 | Method for detecting flexural strength of cement concrete pavement |
Non-Patent Citations (2)
| Title |
|---|
| 王小勇: "干硬性混凝土预制块在水利工程中的现场检测和应用研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》, no. 8, pages 21 - 41 * |
| 盛德民: "干硬性混凝土在河道整治工程中的应用研究", 《水利技术监督》, no. 10, pages 242 - 245 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Yang et al. | Development of a new in situ test method to measure the air permeability of high performance concretes | |
| CN106769441B (en) | Method for detecting solid strength and construction quality of grouting material for grouting connection of steel bar sleeve | |
| Hobbs et al. | Non-destructive testing techniques for the forensic engineering investigation of reinforced concrete buildings | |
| Rivard et al. | Assessing alkali-silica reaction damage to concrete with non-destructive methods: From the lab to the field | |
| US11346817B2 (en) | Apparatus and method for evaluating properties of temporary plugging agent based on acoustic emission | |
| CN103196794A (en) | Automatic testing system used for testing fresh mixing performance of concrete | |
| CN108489808A (en) | A kind of method of acoustic emission test concrete in uniaxial tension stress strain stress relation | |
| US11630097B2 (en) | Quantitative evaluation method for workability of concrete based on bottom resistance analysis | |
| Pereira et al. | Pull Off test to evaluate the compressive strength of concrete: an alternative to Brazilian standard techniques | |
| Xie et al. | A new method to determine the crack closure stress based on stress difference | |
| JP2009001981A (en) | Soil quality inspection method | |
| US8610444B2 (en) | Method and system for analyzing a chemically-active material | |
| Gooch et al. | Statistical assessment of tensile and shear properties of unreinforced clay brick masonry | |
| CN117074164A (en) | Dry-hard concrete detection method and system for water conservancy construction site | |
| JP2016217740A (en) | Method for determining workability of concrete | |
| JP3606086B2 (en) | Strength estimation method for structural concrete | |
| CN115130179B (en) | Method for determining safety of concrete structure containing steel slag aggregate | |
| CN110763583A (en) | Concrete strength detection method | |
| CN207366350U (en) | A kind of detection test specimen of Creep of Concrete-filled Steel Tube | |
| JP7257797B2 (en) | Concrete setting time determination device, determination method and concrete construction method | |
| Gambilongo et al. | Evaluation of non-destructive techniques for mechanical characterisation of earth-based mortars in masonry joints | |
| Wang et al. | Assessment of determination methods for time-zero of autogenous shrinkage in cement mortars | |
| CN116067840A (en) | Characterization method, device, equipment and storage medium for slurry fluidity | |
| Moczko et al. | In-situ examination of the concrete quality European standard approach | |
| KR102424927B1 (en) | Measuring apparatus for height of specimen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |