CN110631904B - Water stability testing method for building waste mixture with stable inorganic binder - Google Patents
Water stability testing method for building waste mixture with stable inorganic binder Download PDFInfo
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- CN110631904B CN110631904B CN201910723230.3A CN201910723230A CN110631904B CN 110631904 B CN110631904 B CN 110631904B CN 201910723230 A CN201910723230 A CN 201910723230A CN 110631904 B CN110631904 B CN 110631904B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000000203 mixture Substances 0.000 title claims abstract description 42
- 239000002699 waste material Substances 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 30
- 239000011230 binding agent Substances 0.000 title claims description 25
- 238000012430 stability testing Methods 0.000 title description 4
- 238000012360 testing method Methods 0.000 claims abstract description 166
- 230000006835 compression Effects 0.000 claims abstract description 119
- 238000007906 compression Methods 0.000 claims abstract description 119
- 238000010276 construction Methods 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000002791 soaking Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 10
- 229920001971 elastomer Polymers 0.000 claims description 4
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 3
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 3
- 239000010881 fly ash Substances 0.000 claims description 3
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 3
- 239000004571 lime Substances 0.000 claims description 3
- 239000011707 mineral Substances 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000012669 compression test Methods 0.000 description 16
- 239000000463 material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000003673 groundwater Substances 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 238000013112 stability test Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 239000011384 asphalt concrete Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/28—Preparing specimens for investigation including physical details of (bio-)chemical methods covered elsewhere, e.g. G01N33/50, C12Q
- G01N1/30—Staining; Impregnating ; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis
-
- 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
-
- 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
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/025—Geometry of the test
- G01N2203/0252—Monoaxial, i.e. the forces being applied along a single axis of the specimen
-
- 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
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/91—Use of waste materials as fillers for mortars or concrete
Abstract
The invention relates to the technical field of construction waste, and discloses a method for testing building waste, which comprises the following testing steps: 1) preparing a first compression-resistant test piece and a second compression-resistant test piece by using the mixture; 2) placing the first compression-resistant test piece in a constant-temperature and constant-humidity curing room for curing for not less than 7 days, and placing the compression-resistant test piece in the curing room in water for soaking for not less than 24 hours in the first 1 day when the curing age is reached; placing the second pressure resistant test piece in a constant-temperature constant-humidity curing room for curing for not less than 2 days, and placing the second pressure resistant test piece in water for curing after the curing age is reached, wherein the curing age is not less than 7 days; 3) obtaining the compressive strength of the first compressive test piece as P1Obtaining the compressive strength P of the second compressive test piece2(ii) a Using water stability factor A = P1/P2Reflecting the water stability of the mixture; the first compression-resistant test piece and the second compression-resistant test piece are maintained differently, the water stability coefficient obtained by comparing the compression strengths is used for reflecting the water stability of the mixture, the test process is simple, and the operation is convenient.
Description
Technical Field
The invention relates to the technical field of construction waste, in particular to a method for testing the water stability of a construction waste mixture with stable inorganic binder.
Background
The roadbed must be able to bear the self weight of roadbed material and the gravity of the pavement structure on the upper part of the roadbed, and at the same time, must bear the vehicle running load transferred from the pavement structure, so that the roadbed is an important bearing part of the road, and the roadbed must have sufficient strength, rigidity and stability as the bearing foundation of the upper pavement structure.
The rainwater is more in south, especially summer, and the rainwater can permeate to the road bed through road structure layer, also can permeate to the road bed from the boundary of curb and road surface. In road construction, in order to prevent the pavement material from being damaged due to expansion caused by heat and contraction caused by cold, expansion joints are usually reserved on the pavement, and the expansion joints directly serve as passages for rainwater to enter the roadbed. Further, the road is cracked due to shrinkage of the material, the running of the vehicle causes damage to the road surface, and rainwater may enter the roadbed along the crack or the damaged portion of the road surface. In areas where the groundwater level is high, groundwater may enter the subgrade by capillary action. The various factors mentioned above may cause the moisture content of the roadbed to increase, and the road surface may hinder the evaporation of moisture from the roadbed, especially asphalt concrete roads, and promote the roadbed to be in a wet state for a long time. The increase of the water content in the roadbed can cause the change of the roadbed strength and influence the service performance of the road.
In the prior art, in order to study the strength change condition of the material of the roadbed under the condition of increasing the water content, namely the water stability of the construction waste mixture with stable inorganic binder needs to be analyzed, so that the water stability of the roadbed formed by the mixture is studied, and the quality of the roadbed formed by subsequent construction is ensured. However, when the water stability of the mixture is tested in a laboratory, the problems of complicated testing process and troublesome testing exist.
Disclosure of Invention
The invention aims to provide a method for testing the water stability of a building waste mixture with stable inorganic binder, and aims to solve the problems of complex test and troublesome operation in the water stability test of the mixture in the prior art.
The invention relates to a method for testing the water stability of a building waste mixture with stable inorganic binder, which is used for testing the water stability of the building waste mixture with stable inorganic binder and comprises the following testing steps:
1) uniformly mixing the building wastes stabilized by the inorganic binder to form a mixture, and preparing a plurality of compression-resistant test pieces by using the mixture, wherein the plurality of compression-resistant test pieces comprise a first compression-resistant test piece and a second compression-resistant test piece;
2) placing the first pressure-resistant test piece in a constant-temperature and constant-humidity curing chamber for curing, wherein the curing age is not less than 7 days, and placing the pressure-resistant test piece in the curing chamber in water for soaking for not less than 24 hours in the first 1 day of the curing age; placing the second pressure resistant test piece in a constant-temperature and constant-humidity curing room for curing, wherein the curing age is not less than 2 days, and after the curing age is reached, placing the second pressure resistant test piece in water for curing, wherein the curing age is not less than 7 days;
3) respectively placing the first compression-resistant test piece and the second compression-resistant test piece in a press machine for compression strength test, and obtaining the compression strength P of the first compression-resistant test piece1Obtaining the compressive strength P of the second compressive test piece2(ii) a Using water stability factor A = P1/ P2Reflecting the water stability of the mix.
Further, the temperature range in the curing chamber is 18-22 ℃; and the relative humidity in the curing chamber is not lower than 90%.
Further, in the testing step 1), construction waste is used as a sample, the inorganic binder is lime or fly ash or mineral powder, and the construction waste and the inorganic binder are mixed with water uniformly to form the mixture.
Furthermore, the press machine comprises a compression table, two vertically arranged track beams and a mobile station, wherein the two track beams are respectively arranged on two sides of the compression table, two sides of the mobile station are respectively and correspondingly movably connected to the two track beams, and the mobile station moves up and down along the track beams; the pressure-resistant table is provided with a placing end face which is arranged upwards, the placing end face is arranged horizontally, the movable table is provided with a pressure head, the pressure head is arranged downwards and is provided with a pressure end face which is positioned above the placing end face, and the pressure end face is arranged horizontally and is aligned with the placing end face up and down; placing the compression-resistant test piece on the placing end face in a vertical shape, wherein the pressure head is positioned above the compression-resistant test piece; in the step 3), the press machine is started, the movable platform drives the pressure head to move downwards, the pressure end face is pressed on the compression-resistant test piece in a supporting mode, the movable platform continuously moves downwards, the pressure head continuously applies pressure to the compression-resistant test piece in a supporting mode, deformation of the compression-resistant test piece keeps the increase of the same speed, the maximum pressure of the compression-resistant test piece during compression damage is recorded, the sectional area of the compression-resistant test piece is combined, and the compression strength of the compression-resistant test piece is obtained.
Further, a motor is arranged on the mobile station, the motor is connected with impact rods which are arranged downwards and driven by the motor to move up and down, and the impact rods are arranged vertically; a through hole is vertically arranged in the middle shaft position of the pressure head, and the impact rod penetrates through the through hole; in the testing step 3), when the pressure head continuously applies pressure to the compression-resistant test piece, the motor drives the impact rod to move up and down, so that the impact rod intermittently impacts the compression-resistant test piece.
Further, the diameter of the impact rod is smaller than that of the through hole, and a gap is formed between the periphery of the impact rod and the inner side wall of the through hole; the periphery of the impact rod is provided with two guide rail strips which are symmetrically arranged, the guide rail strips extend along the axial direction of the impact rod, the inner side wall of the through hole is provided with two guide rail grooves which are symmetrically arranged, the guide rail grooves extend along the axial direction of the through hole, and the guide rail strips are movably arranged in the guide rail grooves; in the testing step 3), when the impact rod moves up and down in the through hole, the guide rail strip moves up and down along the guide rail groove.
Further, an enclosing ring is arranged on the pressure-resistant table and is vertically arranged, and the periphery of the enclosing ring is arranged on the periphery of the placing end face; in the testing step 3), after the compression-resistant test piece is placed on the placing end face, the surrounding ring surrounds and abuts against the periphery of the compression-resistant test piece; along the vertical direction, the top of the surrounding ring undulates in a wave-like manner.
Furthermore, a plurality of concave ring grooves are formed in the concave part of the placing end face, the concave ring grooves are arranged around the center of the placing end face, the concave ring grooves are nested with one another, elastic strips are filled in the concave ring grooves, and the elastic strips are arranged in parallel with the placing end face; in the testing step 3), after the compression-resistant test piece is placed on the placing end face, the elastic strip abuts against the compression-resistant test piece.
Further, a detection head for detecting the moving direction of the mobile station is arranged at the top of the track beam, and the detection head is arranged downwards; in the step 3), in the process that the pressure head continuously presses the compression-resistant test piece to damage the compression-resistant test piece, when the detection head detects that the mobile platform moves upwards, the press machine is stopped.
Furthermore, a rubber ring is fixedly connected above the mobile station, surrounds the periphery of the track beam and is abutted against the track beam.
Compared with the prior art, the method for testing the water stability of the building waste mixture with stable inorganic binder provided by the invention has the advantages that the first compression-resistant test piece and the second compression-resistant test piece are respectively prepared from the mixture, different curing treatments are carried out on the first compression-resistant test piece and the second compression-resistant test piece, the compression strength of the first compression-resistant test piece and the compression strength of the second compression-resistant test piece are tested by using a press, the water stability coefficient of the mixture is obtained by comparing the compression strengths of the first compression-resistant test piece and the second compression-resistant test piece, the water stability of the mixture is reflected, the whole testing process is simple, and the operation is also convenient.
Drawings
FIG. 1 is a schematic flow diagram of a method for testing inorganic binder stabilized construction waste compounds provided by the present invention;
FIG. 2 is a schematic front view of a press provided by the present invention;
fig. 3 is a schematic top view of the placement end surface of the compression-resistant table provided by the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The following describes the implementation of the present invention in detail with reference to specific embodiments.
The same or similar reference numerals in the drawings of the present embodiment correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Referring to fig. 1-3, preferred embodiments of the present invention are shown.
The water stability testing method provided by the embodiment is used for researching the water stability of the mixture formed by the construction waste with stable inorganic binder, and the water stability of the mixture is reflected by adopting the water stability coefficient.
The water stability testing method of the building waste mixture with stable inorganic binder is used for testing the water stability of the building waste mixture with stable inorganic binder, and comprises the following testing steps:
1) uniformly mixing the building wastes stabilized by the inorganic binder to form a mixture, and preparing a plurality of compression-resistant test pieces 600 by using the mixture, wherein the plurality of compression-resistant test pieces 600 comprise a first compression-resistant test piece and a second compression-resistant test piece;
2) placing the first compression-resistant test piece in a constant-temperature and constant-humidity curing chamber for curing, wherein the curing age is not less than 7 days, and in the first 1 day of the curing age, placing the compression-resistant test piece in the curing chamber in water for soaking for not less than 24 hours, so that the conventional curing of the first compression-resistant test piece is achieved; placing the second pressure resistant test piece in a constant-temperature and constant-humidity curing room for curing, wherein the curing age is not less than 2 days, placing the second pressure resistant test piece in water for curing after the curing age is reached, and the curing age is not less than 7 days, so that the water curing of the second pressure resistant test piece is reached, and the water content of the second pressure resistant test piece can be gradually increased until the second pressure resistant test piece is saturated;
3) respectively placing the first compression-resistant test piece and the second compression-resistant test piece in a press machine for carrying out compression strength test, wherein the obtained compression strength of the first compression-resistant test piece is P1Obtaining the compressive strength P of the second compressive test piece2(ii) a Using water stability factor A = P1/ P2Reflecting the water stability of the mix.
The above-mentioned stable building waste mixture's of inorganic binder water stability test method that provides adopts the mixture to prepare first resistance to compression test piece and second resistance to compression test piece respectively, carries out different maintenance to first resistance to compression test piece and second resistance to compression test piece and handles, utilizes the compressive strength of first resistance to compression test piece of press test and second resistance to compression test piece, utilizes the compressive strength contrast of first resistance to compression test piece and second resistance to compression test piece to obtain the water stability that water stability coefficient reflects the mixture, whole test procedure is simple, and the operation is also convenient.
In this embodiment, the temperature range in the curing chamber is 18 ℃ to 22 ℃; and the relative humidity in the curing chamber is not lower than 90%.
In the testing step 1), the construction waste is used as a sample, the inorganic binder is lime or fly ash or mineral powder, and the construction waste and the inorganic binder are mixed with water uniformly to form a mixture.
In this embodiment, the press machine includes a compression-resistant platform 700, two vertically arranged track beams 100 and a mobile station 200, wherein the two track beams 100 are respectively arranged at two sides of the compression-resistant platform 700, two sides of the mobile station 200 are respectively and correspondingly movably connected to the two track beams 100, and the mobile station 200 moves up and down along the track beams 100; the pressure resisting platform 700 is provided with a placing end surface 702 which is arranged upwards, the placing end surface 702 is horizontally arranged, the moving platform 200 is provided with a pressure head 400, the pressure head 400 is arranged downwards and is provided with a pressure end surface which is positioned above the placing end surface 702, and the pressure end surface is horizontally arranged and is vertically aligned with the placing end surface 702; the compression-resistant test piece 600 is vertically placed on the placing end surface 702, and the pressure head 400 is located above the compression-resistant test piece 600.
In the testing step 3), the press machine is started, the moving platform 200 drives the pressure head 400 to move downwards, the pressure end face is pressed on the compression-resistant test piece 600 in a supported mode, the moving platform 200 continuously moves downwards, the pressure head 400 continuously applies pressure to the compression-resistant test piece 600, deformation of the compression-resistant test piece 600 keeps increasing at the same speed, the maximum pressure when the compression-resistant test piece 600 is damaged under pressure is recorded, the cross-sectional area of the compression-resistant test piece 600 is combined, the compression strength of the compression-resistant test piece 600 is obtained, the testing process is simple, and the operation is simple.
The moving speed of the pressure head 400 which downwards presses the compression-resistant test piece 600 is not higher than 1mm/min, so that excessive impact is avoided.
The moving platform 200 is provided with a motor, the motor is connected with an impact rod 500 which is arranged downwards and driven by the motor to move up and down, and the impact rod 500 is arranged vertically; a through hole is vertically arranged at the middle shaft position of the pressure head 400, and the impact rod 500 is arranged in the through hole in a penetrating way; in the testing step 3), when the indenter 400 continuously applies pressure to the anti-pressure test piece 600, the motor drives the impact rod 500 to move up and down, so that the impact rod 500 intermittently impacts the anti-pressure test piece 600.
Through setting up impact bar 500 intermittent impact resistance to compression test piece 600, can simulate in actual road bed environment, the impact to road bed such as driving on the road bed to make the test process preferred get reduction actual use, and, this impact plate strikes resistance to compression test piece 600's central point puts, avoids causing the damage to resistance to compression test piece 600's edge.
In the testing step 3), after the pressure head 400 is pressed against the compression-resistant test piece 600, the center line of the through hole of the pressure head 400 coincides with the central axis of the compression-resistant test piece 600, so that the impact rod 500 can impact the central axis of the compression-resistant test piece 600.
The diameter of the impact rod 500 is smaller than that of the through hole, and a gap is formed between the periphery of the impact rod 500 and the inner side wall of the through hole, so that the impact rod 500 moves up and down in the through hole; the periphery of impact rod 500 is provided with two guide rail strips of symmetrical arrangement, and the guide rail strip extends along impact rod 500's axial, is provided with two guide rail grooves of symmetrical arrangement on the inside wall of through-hole, and the guide rail groove is arranged along the axial extension of through-hole, and the guide rail strip activity is arranged in the guide rail groove.
In the test step 3), when the impact bar 500 moves up and down in the through hole, the rail bar moves up and down along the rail groove. Thus, the guide rail bar is matched with the guide rail groove, so that the effects of guiding and positioning the movement of the impact bar 500 can be achieved, and the phenomena of deflection and the like of the impact bar 500 in the impact process can be avoided.
The pressure-resistant platform 700 is provided with a surrounding ring 701, the surrounding ring 701 is vertically arranged, and the periphery of the surrounding ring 701 is arranged on the periphery of the placing end surface 702; in the test step 3), after the compression resistant test piece 600 is placed on the placement end surface 702, the surrounding ring 701 surrounds and abuts against the outer periphery of the compression resistant test piece 600. Like this, can be with better fixing of resistance to compression test piece 600 place the terminal surface 702 on, and support the in-process of pressing resistance to compression test piece 600, under the restriction of surrounding ring 701, can avoid the bottom of resistance to compression test piece 600 skew of skidding, guarantee the normal clear of whole experiment, and improve the precision of experimental result.
The top of the surrounding ring 701 undulates in the vertical direction, so that the surrounding height of the surrounding ring 701 with respect to the outer periphery of the compression resistance test piece 600 is different. In actual environment, the contact of the lateral wall of road bed and outside also has the height difference, consequently, surrounds ring 701's setting, can reduce the resistance to compression experiment of resistance to compression test piece 600 to the in-service use, improves the precision of experimental result greatly.
The placing end face 702 is concavely provided with a plurality of sunken ring grooves, the sunken ring grooves are arranged around the center of the placing end face 702 and are mutually nested, the sunken ring grooves are filled with elastic strips 703, and the elastic strips 703 are arranged in parallel with the placing end face 702; in the testing step 3), after the compression-resistant test piece 600 is placed on the placing end surface 702, the elastic strip 703 abuts against the compression-resistant test piece 600, so that after the bottom of the whole compression-resistant test piece 600 abuts against the compression-resistant table 700, the bottom of the whole compression-resistant test piece is not completely in rigid abutment, and part of the whole compression-resistant test piece is in flexible abutment, so that the actual environment of the bottom of the road subgrade can be simulated.
The top of the track beam 100 is provided with a detection head for detecting the moving direction of the mobile station 200, and the detection head is arranged downwards; in step 3), during the process that the indenter 400 continues to press down the compression-resistant test piece 600 until the compression-resistant test piece 600 is damaged, when the detection head detects that the moving platform 200 moves upwards, the press machine is stopped.
In the process that the pressure head 400 abuts against the compression-resistant test piece 600, the restoring force generated when the compression-resistant test piece 600 deforms may cause the moving platform 200 to move reversely, and thus the test result may be affected, so that the detection head is arranged, and in the process that the pressure head 400 abuts against the compression, if the moving platform 200 moves reversely, the test is considered to fail, and the test is conducted again.
The upper part of the mobile station 200 is fixedly connected with a rubber ring which surrounds the periphery of the track beam and is abutted against the track beam. Under the butt effect of rubber ring and track roof beam, form the frictional force restriction to the removal of mobile station 200, like this, in certain extent, when the indenter 400 is in the in-process of propping against resistance to compression test piece 600, restriction mobile station 200's reverse movement.
The above description is intended to be illustrative of the preferred embodiment of the present invention and should not be taken as limiting the invention, but rather, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.
Claims (6)
1. The method for testing the water stability of the building waste mixture with stable inorganic binder is characterized by comprising the following testing steps of:
1) uniformly mixing the building wastes stabilized by the inorganic binder to form a mixture, and preparing a plurality of compression-resistant test pieces by using the mixture, wherein the plurality of compression-resistant test pieces comprise a first compression-resistant test piece and a second compression-resistant test piece;
2) placing the first pressure-resistant test piece in a constant-temperature and constant-humidity curing chamber for curing, wherein the curing age is not less than 7 days, and placing the pressure-resistant test piece in the curing chamber in water for soaking for not less than 24 hours in the first 1 day of the curing age; placing the second pressure resistant test piece in a constant-temperature constant-humidity curing room for curing, wherein the curing age is not less than 2 days, and after the curing age is reached, placing the second pressure resistant test piece in water for curing, wherein the curing age is not less than 7 days;
3) respectively placing the first compression-resistant test piece and the second compression-resistant test piece in a press machine for compression strength test, and obtaining the compression strength P of the first compression-resistant test piece1Obtaining the compressive strength P of the second compressive test piece2(ii) a Using water stability factor A = P1/ P2Reflecting the water stability of the mixture;
the press machine comprises a compression table, two vertically arranged track beams and a moving table, wherein the two track beams are respectively arranged on two sides of the compression table, two sides of the moving table are respectively and correspondingly movably connected to the two track beams, and the moving table moves up and down along the track beams; the pressure-resistant table is provided with a placing end face which is arranged upwards, the placing end face is arranged horizontally, the movable table is provided with a pressure head, the pressure head is arranged downwards and is provided with a pressure end face which is positioned above the placing end face, and the pressure end face is arranged horizontally and is aligned with the placing end face up and down; placing the compression-resistant test piece on the placing end face in a vertical shape, wherein the pressure head is positioned above the compression-resistant test piece; in the testing step 3), the press machine is started, the movable platform drives the pressure head to move downwards, the pressure end face is pressed against the compression-resistant test piece, the movable platform continuously moves downwards, the pressure head continuously applies pressure to the compression-resistant test piece, deformation of the compression-resistant test piece is kept at the same speed, the maximum pressure of the compression-resistant test piece during compression damage is recorded, and the compression strength of the compression-resistant test piece is obtained by combining the sectional area of the compression-resistant test piece;
the moving platform is provided with a motor, the motor is connected with impact rods which are arranged downwards and driven by the motor to move up and down, and the impact rods are arranged vertically; a through hole is vertically arranged in the middle shaft position of the pressure head, and the impact rod penetrates through the through hole; in the testing step 3), when the pressure head continuously applies pressure to the compression-resistant test piece, the motor drives the impact rod to move up and down, so that the impact rod intermittently impacts the compression-resistant test piece;
the diameter of the impact rod is smaller than that of the through hole, and a gap is formed between the periphery of the impact rod and the inner side wall of the through hole; the periphery of the impact rod is provided with two guide rail strips which are symmetrically arranged, the guide rail strips extend along the axial direction of the impact rod, the inner side wall of the through hole is provided with two guide rail grooves which are symmetrically arranged, the guide rail grooves extend along the axial direction of the through hole, and the guide rail strips are movably arranged in the guide rail grooves; in the testing step 3), when the impact rod moves up and down in the through hole, the guide rail strip moves up and down along the guide rail groove;
the placing end face is sunken to form a plurality of sunken ring grooves, the sunken ring grooves are arranged around the center of the placing end face, the sunken ring grooves are mutually nested, elastic strips are filled in the sunken ring grooves, and the elastic strips are arranged in parallel with the placing end face; in the testing step 3), after the compression-resistant test piece is placed on the placing end face, the elastic strip abuts against the compression-resistant test piece.
2. The method for testing the water stability of an inorganic binder stabilized construction waste mixture according to claim 1, wherein the temperature in the curing chamber is in the range of 18 ℃ to 22 ℃; and the relative humidity in the curing chamber is not lower than 90%.
3. The method for testing the water stability of the construction waste mixture stabilized by the inorganic binder according to claim 1, wherein in the testing step 1), the construction waste is used as a sample, the inorganic binder is lime or fly ash or mineral powder, and the construction waste and the inorganic binder mixed water are uniformly mixed to form the mixture.
4. The method for testing the water stability of an inorganic binder-stabilized construction waste mixture according to any one of claims 1 to 3, wherein an enclosing ring is provided on the pressure-resistant table, the enclosing ring being arranged vertically, and the outer periphery of the enclosing ring being at the outer periphery of the placement end face; in the testing step 3), after the compression-resistant test piece is placed on the placing end face, the surrounding ring surrounds and abuts against the periphery of the compression-resistant test piece; along the vertical direction, the top of the surrounding ring undulates in a wave-like manner.
5. The method for testing the water stability of an inorganic binder-stabilized construction waste mixture according to any one of claims 1 to 3, wherein a detection head for detecting the moving direction of the moving table is provided on the top of the track beam, and the detection head is arranged downward; in the step 3), in the process that the pressure head continuously presses the compression-resistant test piece to damage the compression-resistant test piece, when the detection head detects that the mobile platform moves upwards, the press machine is stopped.
6. The method for testing the water stability of the inorganic binder-stabilized construction waste mixture according to any one of claims 1 to 3, wherein a rubber ring is fixedly connected to the upper part of the moving table, surrounds the outer periphery of the track beam and abuts against the track beam.
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