CN115468876B - Fluidity testing device and method for pervious concrete - Google Patents
Fluidity testing device and method for pervious concrete Download PDFInfo
- Publication number
- CN115468876B CN115468876B CN202211168389.1A CN202211168389A CN115468876B CN 115468876 B CN115468876 B CN 115468876B CN 202211168389 A CN202211168389 A CN 202211168389A CN 115468876 B CN115468876 B CN 115468876B
- Authority
- CN
- China
- Prior art keywords
- pervious concrete
- layer cylinder
- side plate
- cylinder member
- groove
- 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.)
- Active
Links
- 239000011380 pervious concrete Substances 0.000 title claims abstract description 103
- 238000012360 testing method Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims description 20
- 238000005303 weighing Methods 0.000 claims abstract description 38
- 239000004567 concrete Substances 0.000 claims description 26
- 238000010998 test method Methods 0.000 claims description 19
- 238000011049 filling Methods 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 14
- 239000011248 coating agent Substances 0.000 claims description 5
- 238000000576 coating method Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 238000000926 separation method Methods 0.000 claims description 4
- 238000011068 loading method Methods 0.000 claims description 3
- 239000012466 permeate Substances 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 8
- 238000002156 mixing Methods 0.000 abstract description 4
- 239000012615 aggregate Substances 0.000 description 42
- 239000002893 slag Substances 0.000 description 30
- 229910000831 Steel Inorganic materials 0.000 description 15
- 239000010959 steel Substances 0.000 description 15
- 239000010438 granite Substances 0.000 description 9
- 239000002994 raw material Substances 0.000 description 9
- 229920006395 saturated elastomer Polymers 0.000 description 8
- PMZURENOXWZQFD-UHFFFAOYSA-L Sodium Sulfate Chemical compound [Na+].[Na+].[O-]S([O-])(=O)=O PMZURENOXWZQFD-UHFFFAOYSA-L 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 229910052938 sodium sulfate Inorganic materials 0.000 description 5
- 235000011152 sodium sulphate Nutrition 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 230000035699 permeability Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 239000002639 bone cement Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- KEAYESYHFKHZAL-OUBTZVSYSA-N sodium-24 Chemical group [24Na] KEAYESYHFKHZAL-OUBTZVSYSA-N 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N11/00—Investigating flow properties of materials, e.g. viscosity, plasticity; Analysing materials by determining flow properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
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)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention relates to a fluidity testing device of pervious concrete, which comprises a sleeve, an upper layer cylinder member, a middle layer cylinder member, a lower layer groove member and a weighing container; grooves for vertically inserting a front panel are formed in the front sides of the inner walls of the left side plate and the right side plate; the front panel realizes vertical sliding disassembly and assembly through the groove; at least three convex fixing belts extending forwards and backwards are vertically distributed on the inner walls of the left side plate and the right side plate; fixing grooves which are used for correspondingly inserting the fixing belts back and forth are formed in the left side and the right side of the upper layer cylinder member, the middle layer cylinder member and the lower layer groove member; the height of the weighing container is the same as that of the lower groove-shaped component. According to the invention, the fluidity of the pervious concrete is represented according to the distribution difference of the cementing materials of the pervious concrete, the actual fluidity of the pervious concrete can be accurately represented by the test result, the mixing ratio of the pervious concrete can be optimized, and the problem that the existing slump meter is not suitable for detecting the fluidity of the pervious concrete is solved.
Description
Technical Field
The invention relates to a fluidity testing device and a fluidity testing method for pervious concrete, and belongs to the technical field of performance detection of pervious concrete.
Background
The permeable concrete is a porous concrete which is prepared by taking cementing materials, aggregate and water as main raw materials and through the processes of mixing, forming, curing and the like. The porosity, mechanical property, permeability and other properties of the pervious concrete are greatly influenced by the flowability of the mixture. When the fluidity is too high, the slurry is easy to deposit at the bottom of the pervious concrete to cause pore blocking, which is unfavorable for the permeability of the pervious concrete. When the fluidity is too low, the slurry is piled in the communicated pores of the pervious concrete and cannot be uniformly wrapped around the aggregate, so that the pervious concrete has poor mechanical property, permeability and effective porosity. Moreover, too low fluidity is detrimental to uniform stirring of the mix. Therefore, it is necessary to test the fluidity of the pervious concrete.
At present, ordinary concrete adopts a slump meter to test fluidity, and pervious concrete is different from ordinary concrete. Therefore, there are a number of problems with measuring the fluidity of pervious concrete by slump flow:
1. compared with common concrete, the bone cement of the pervious concrete is higher. Therefore, the cohesion and plasticity of the pervious concrete mixture are poor. When the flowing property of the pervious concrete is poor, the cohesive action of the cementing material is obviously reduced, the pervious concrete is in a dispersed and stacked state, and if the flowing property of the pervious concrete is detected by adopting a slump meter, the testing result is generally larger and is inconsistent with the actual fluidity. Therefore, the slump meter is adopted to test the fluidity of the pervious concrete, and the fluidity of the pervious concrete is difficult to accurately characterize.
2. For the pervious concrete with larger fluidity, when the test result of the slump meter reaches 220mm, if the fluidity of the pervious concrete is continuously improved, the test result of the slump meter is basically unchanged, so that the measured value and the actual flowing property have larger difference. Therefore, when the fluidity of the pervious concrete is high, the slump meter is not suitable for testing the fluidity of the pervious concrete.
3. When the slump meter is used for testing the fluidity of the pervious concrete, certain manual tamping needs to be carried out on the mixture, and for the porous pervious concrete, part of cementing materials are easy to sink to the bottom due to vibration generated in the manual tamping process, so that the cohesiveness of the mixture at the upper part is reduced. However, the slump meter test result does not consider the influence of the change of the distribution condition of the cementing material on the fluidity of the pervious concrete, and finally the fluidity test result is larger.
Therefore, in order to improve the accuracy of measuring the flow property of the pervious concrete, the invention provides the flow property testing device and the flow property testing method of the pervious concrete, which have important significance for effectively detecting the flow property of the pervious concrete.
Disclosure of Invention
In view of the defects of the prior art, the technical problem to be solved by the invention is to provide a fluidity testing device and a testing method of pervious concrete.
In order to solve the technical problems, the technical scheme of the invention is as follows: the fluidity testing device of the pervious concrete comprises a sleeve, an upper layer cylinder member, a middle layer cylinder member, a lower layer groove member, a weighing container and an auxiliary drag hook; the sleeve comprises a bottom plate, a left side plate, a right side plate, a front panel and a rear panel; grooves for vertically inserting a front panel are formed in the front sides of the inner walls of the left side plate and the right side plate; the front panel realizes vertical sliding disassembly and assembly through the groove; at least three convex fixing belts extending forwards and backwards are vertically distributed on the inner walls of the left side plate and the right side plate; fixing grooves which are used for correspondingly inserting the fixing belts back and forth are formed in the left side and the right side of the upper layer cylinder member, the middle layer cylinder member and the lower layer groove member; auxiliary holes are formed in the front sides of the upper layer cylinder member, the middle layer cylinder member and the lower layer groove member; the weighing container is of a box body structure with an unsealed top, and an inclined side panel which is inclined by 45 degrees from bottom to top to back is arranged at the rear side of the weighing container; the height of the weighing container is the same as that of the lower groove-shaped component.
Preferably, the upper layer cylinder member and the middle layer cylinder member are both in cylinder structures with upper and lower openings.
Preferably, the wall thicknesses of the cylinder walls of the upper layer cylinder member, the middle layer cylinder member and the lower layer groove-shaped member are the same.
Preferably, the height of the upper layer cylinder member is 1/3-1/2 of the height of the middle layer cylinder member; the height of the middle layer cylinder component is the same as that of the lower layer groove component.
Preferably, the lower groove-shaped member is a box structure with an unsealed top.
Preferably, the shape of auxiliary drag hook is T shape, two tractive separation blades have all been set firmly to the hole reason of auxiliary hole in the diametric symmetry, and the clearance between two tractive separation blades is used for assisting the short rod of pulling of drag hook to insert, and the short rod of pulling is fixed in auxiliary drag hook's straight-bar one end, and the other end of straight-bar is fixed and is pulled the extension pole for holding.
Preferably, the left side plate, the right side plate and the rear panel are fixedly connected with the bottom plate.
Preferably, a boosting handle is arranged on the outer side of the front panel, and the front panel can be disassembled and assembled through the boosting handle.
Preferably, the outer side walls of the left side plate and the right side plate are provided with handles.
The method for testing the fluidity testing device of the pervious concrete comprises the following steps:
step one: the mass of the lower layer trough-shaped component and the weighing container are respectively marked as m 1 And m 2 The method comprises the steps of carrying out a first treatment on the surface of the Coating a release agent on the fixing belt and the fixing groove, sequentially placing a lower layer groove type component, a middle layer cylinder component and an upper layer cylinder component into the sleeve, and sealing the front panel;
step two: filling pervious concrete into the lower groove-shaped component, the middle cylinder-shaped component and the upper cylinder-shaped component respectively, and after each filling, using a tamping rod to interpolate and stamp more downwards from outside to inside clockwise; after filling, redundant pervious concrete on the upper surface of the upper layer cylinder member is scraped off, so that the filling height of the pervious concrete and the upper edge of the upper layer cylinder member are kept at the same horizontal plane;
step three: placing the testing device filled with the permeable concrete on a vibrating table, and vibrating for a few seconds by adopting vibration; after the vibration is finished, the upper layer cylinder member is pulled out through the auxiliary drag hook connection auxiliary hole;
step four: clamping the upper edge of the rear side of the weighing container between the left side plate and the right side plate, and enabling the upper edge of the rear side of the inclined side plate to be tightly attached to the lower groove-shaped member; pulling out the middle layer cylinder component, filling the pervious concrete in the middle layer cylinder component into a weighing container, and weighing the pervious concrete and the weighing container, wherein the total mass of the pervious concrete and the weighing container is recorded as m 3 The method comprises the steps of carrying out a first treatment on the surface of the Then the lower layer trough-shaped component is pulled out, and the total mass of the lower layer trough-shaped component and the pervious concrete is weighedDenoted as m 4 ；
Step five: the flow coefficient γ is calculated using the following:
the test mode is adopted to perform three tests to obtain gamma 1 、γ 2 、γ 3 Average outThe method is used for judging the flow property of the pervious concrete; the water permeable concrete flow performance judgment standard is as follows:
when gamma is less than 0.90, the flow property is too high;
when gamma is more than or equal to 0.90 and less than 1.0, the flow property is good;
when γ=1.0, the flow properties are too low;
when gamma is more than 1.0, the test result is invalid, and the test is repeated until gamma is less than or equal to 1.0.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the characteristics of porous and high bone cement ratio of the pervious concrete, the flow coefficient of the pervious concrete is represented by adopting the mass ratio of the pervious concrete between different layers, the test result is consistent with the actual flow performance, the actual flow performance of the pervious concrete can be accurately represented, and the optimization of the mixing ratio of the pervious concrete is facilitated.
2. According to the testing method, the flowing performance of the pervious concrete is reflected through the distribution difference of the cementing materials of the pervious concrete, and compared with a slump meter testing method, the problem that the flowing performance is reduced due to uneven distribution of the cementing materials caused by disturbance, so that the testing result is inaccurate is avoided.
3. The test method considers the influence of vibration on the flow property of the pervious concrete, and can accurately represent the flow property of the pervious concrete after being influenced by the vibration.
4. The flow coefficient of the invention characterizes the flow property of the pervious concrete, and the test method is still suitable for detecting the flow property of the pervious concrete with higher or lower flow property.
The invention will be described in further detail with reference to the drawings and the detailed description.
Drawings
FIG. 1 is a schematic diagram of the main structure of the present invention;
FIG. 2 is a schematic view of the upper barrel component structure of the present invention;
FIG. 3 is a schematic view of a middle layer barrel component of the present invention;
FIG. 4 is a schematic view of the structure of the lower trough member of the present invention;
FIG. 5 is a schematic view of the internal structure of the sleeve according to the present invention;
FIG. 6 is a schematic view of the internal structure of the main body of the present invention;
FIG. 7 is a schematic view of the weighing container of the present invention;
FIG. 8 is a schematic view of the weighing receptacle of the present invention;
FIG. 9 is a front view of the present invention;
FIG. 10 is a schematic view of an auxiliary retractor of the present invention.
In the figure: 1-sleeve, 2-upper layer barrel component, 3-middle layer barrel component, 4-lower layer groove type component, 5-weighing container, 6-auxiliary drag hook, 7-bottom plate, 8-left side plate, 9-right side plate, 10-front panel, 11-back panel, 12-groove, 13-handle, 14-fixed belt, 15-fixed groove, 16-auxiliary hole, 17-boosting handle, 18-inclined side panel, 1601-pulling baffle, 601-pulling short rod and 602-pulling long rod.
Detailed Description
The invention will be further described with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1 to 10, the present embodiment provides a fluidity testing device for pervious concrete, comprising a sleeve 1, an upper layer cylinder member 2, a middle layer cylinder member 3, a lower layer groove member 4, a weighing container 5 and an auxiliary drag hook 6; the sleeve 1 comprises a bottom plate 7, a left side plate 8, a right side plate 9, a front panel 10 and a rear panel 11; grooves 12 for vertically inserting a front panel 10 are formed in the front sides of the inner walls of the left side plate 8 and the right side plate 9; the front panel 10 realizes vertical sliding disassembly and assembly through the groove 12; at least three convex fixing belts 14 extending forwards and backwards are vertically distributed on the inner walls of the left side plate 8 and the right side plate 9; fixing grooves 15 which are used for correspondingly inserting the fixing belts 14 back and forth are formed in the left side and the right side of the upper layer barrel member 2, the middle layer barrel member 3 and the lower layer groove member 4; auxiliary holes 16 are formed in the front sides of the upper layer barrel member 2, the middle layer barrel member 3 and the lower layer groove-shaped member 4; the weighing container 5 is of a box structure with an unsealed top, and an inclined side panel 18 which is inclined by 45 degrees from bottom to top and backwards is arranged at the rear side of the weighing container 5; the height of the weighing container 5 is the same as the height of the lower trough member 4.
In the embodiment of the invention, the upper layer cylinder member 2 and the middle layer cylinder member 3 are both in cylinder structures with upper and lower openings.
In the embodiment of the invention, the wall thicknesses of the cylinder walls of the upper layer cylinder member 2, the middle layer cylinder member 3 and the lower layer groove member 4 are the same.
In the embodiment of the invention, the height of the upper layer barrel component 2 is 1/3-1/2 of the height of the middle layer barrel component 3; the height of the middle layer cylinder member 3 is the same as that of the lower layer groove member 4.
In the embodiment of the present invention, the lower groove-shaped member 4 is a box structure with an unsealed top.
In the embodiment of the present invention, the auxiliary hook 6 is T-shaped, two pulling baffle plates 1601 are symmetrically and fixedly arranged on the inner hole edge of the auxiliary hole 16 in the diameter direction, a gap between the two pulling baffle plates 1601 is used for assisting the insertion of a pulling short rod 601 of the hook 6, the pulling short rod 601 is fixed at one end of a straight rod of the auxiliary hook 6, and the other end of the straight rod is fixed with a pulling long rod 602 for holding. In use, the pulling short rod 601 is inserted into the gap between the two pulling baffle plates 1601 and then rotated, so that the pulling short rod 601 is clamped at the rear sides of the two pulling baffle plates 1601, thereby facilitating the forward pulling out of the component.
In the embodiment of the present invention, the left side plate 8, the right side plate 9 and the rear panel 11 are all fixedly connected with the bottom plate 7.
In the embodiment of the invention, the boosting handle 17 is arranged on the outer side of the front panel 10, and the front panel 10 can be disassembled by the boosting handle 17.
In the embodiment of the invention, the outer side walls of the left side plate 8 and the right side plate 9 are provided with handles 13.
The method for testing the fluidity testing device of the pervious concrete comprises the following steps:
step one: the mass of the lower tank member 4 and the weighing container 5 are respectively denoted by m 1 And m 2 The method comprises the steps of carrying out a first treatment on the surface of the Coating a release agent on the fixing belt 14 and the fixing groove 15, sequentially placing the lower layer groove-shaped component 4, the middle layer barrel component 3 and the upper layer barrel component 2 into the sleeve 1, and sealing the front panel 10;
step two: respectively filling pervious concrete into the lower groove-shaped component 4, the middle cylinder-shaped component 3 and the upper cylinder-shaped component 2, and tamping the pervious concrete from outside to inside by a tamping rod clockwise after each filling; after filling, redundant pervious concrete on the upper surface of the upper layer cylinder member 2 is scraped off, so that the filling height of the pervious concrete and the upper edge of the upper layer cylinder member 2 are kept at the same horizontal plane;
step three: placing the testing device filled with the permeable concrete on a vibrating table, and vibrating for 5s by adopting a vibrating frequency of 20 kHz; after the vibration is finished, the upper layer cylinder member 2 is pulled out through the auxiliary drag hook 6 and the auxiliary hole 16;
step four: the rear upper edge of the weighing container 5 is clamped into the left side plate 8 and the right side plateBetween the plates 9 and with the upper edge of the rear side of the inclined side panel 18 in close abutment with the lower channel member 4; pulling out the middle layer cylinder member 3, loading the pervious concrete in the middle layer cylinder member 3 into the weighing container 5, and weighing the pervious concrete and the total mass of the weighing container 5, and recording as m 3 The method comprises the steps of carrying out a first treatment on the surface of the Then the lower trough member 4 was pulled out, and the total mass of the lower trough member 4 and the pervious concrete was weighed and recorded as m 4 ；
Step five: the flow coefficient γ is calculated using the following:
the test mode is adopted to perform three tests to obtain gamma 1 、γ 2 、γ 3 Average outThe method is used for judging the flow property of the pervious concrete; the water permeable concrete flow performance judgment standard is as follows:
when gamma is less than 0.90, the flow property is too high;
when gamma is more than or equal to 0.90 and less than 1.0, the flow property is good;
when γ=1.0, the flow properties are too low;
when gamma is more than 1.0, the test result is invalid, and the test is repeated until gamma is less than or equal to 1.0.
The specific implementation process comprises the following steps:
example 1
In the embodiment, the pervious concrete comprises the following raw materials in parts by weight: 30 parts of steel slag, 70 parts of slag, 400 parts of steel slag aggregate, 4.5 parts of sodium sulfate and 20 parts of water; the coarse aggregate is converter steel slag coarse aggregate. The granularity interval of the converter slag coarse aggregate is (4.75, 9.50 mm), and the converter slag coarse aggregate is soaked for more than 12 hours before being used, and then taken out and air-dried to a saturated surface dry state.
The flow coefficient in this example was tested as follows:
step one: the mass of the lower trough-shaped component (4) and the weighing container (5) are respectively marked as m 1 And m 2 The method comprises the steps of carrying out a first treatment on the surface of the Coating a release agent on the fixing belt (14) and the fixing groove (15), sequentially placing the lower layer groove type component (4), the middle layer cylinder component (3) and the upper layer cylinder component (2) into the sleeve (1), and sealing the front panel (10);
step two: respectively filling pervious concrete into the lower layer groove-shaped component (4), the middle layer cylinder-shaped component (3) and the upper layer cylinder-shaped component (2), and tamping the pervious concrete from outside to inside by a tamping rod clockwise after each filling; after filling, redundant pervious concrete on the upper surface of the upper layer cylinder member (2) is scraped off, so that the filling height of the pervious concrete and the upper edge of the upper layer cylinder member (2) are kept at the same horizontal plane;
step three: placing the testing device filled with the permeable concrete on a vibrating table, and vibrating for 5s by adopting a vibrating frequency of 20 kHz; after the vibration is finished, the upper layer cylinder member (2) is pulled out through the auxiliary drag hook (6) and the auxiliary hole (16);
step four: the weighing container (5) is clamped between the front side plate (8) and the rear side plate (9), and the inclined side plate (18) is tightly attached to the lower groove-shaped component (4); pulling out the middle layer cylinder component (3), loading the permeable concrete in the middle layer cylinder component (3) into a weighing container (5), and weighing the permeable concrete and the total mass of the weighing container (5) to be m 3 The method comprises the steps of carrying out a first treatment on the surface of the Then the lower layer trough-shaped component (4) is pulled out, and the total mass of the lower layer trough-shaped component (4) and the permeable concrete is recorded as m 4 ；
Step five: the flow coefficient γ is calculated using the following:
the test mode is adopted to perform three tests to obtain gamma 1 、γ 2 、γ 3 Average outAnd the method is used for judging the flow property of the pervious concrete.
The slump test method in this example is according to GB 50164-2001 (concrete quality control Standard), and is specifically as follows:
in the slump meter with the upper opening of 100mm, the lower opening of 200mm and the height of 300mm, the concrete is tamped after being filled with the pervious concrete for three times, and the concrete is uniformly knocked 25 from outside to inside along the barrel wall by a tamping hammer after each filling, and then is screeded after tamping. Then the barrel is pulled up, the concrete generates slump phenomenon due to the dead weight, and the height of the highest point of the concrete after slump is subtracted by the height of the barrel (300 mm), namely the slump.
Example 2
In the embodiment, the pervious concrete comprises the following raw materials in parts by weight: 30 parts of steel slag, 70 parts of slag, 400 parts of steel slag aggregate, 4.5 parts of sodium sulfate and 24 parts of water; the coarse aggregate is converter steel slag coarse aggregate.
The granularity interval of the converter slag coarse aggregate is (4.75, 9.50 mm), and the converter slag coarse aggregate is soaked for more than 12 hours before being used, and then taken out and air-dried to a saturated surface dry state.
The flow coefficient test method in this embodiment is the same as that of example 1.
The slump test method in this example is the same as that of example 1.
Example 3
In the embodiment, the pervious concrete comprises the following raw materials in parts by weight: 30 parts of steel slag, 70 parts of slag, 400 parts of steel slag aggregate, 4.5 parts of sodium sulfate and 28 parts of water; the coarse aggregate is converter steel slag coarse aggregate.
The granularity interval of the converter slag coarse aggregate is (4.75, 9.50 mm), and the converter slag coarse aggregate is soaked for more than 12 hours before being used, and then taken out and air-dried to a saturated surface dry state.
The flow coefficient test method in this embodiment is the same as that of example 1.
The slump test method in this example is the same as that of example 1.
Example 4
In the embodiment, the pervious concrete comprises the following raw materials in parts by weight: 30 parts of steel slag, 70 parts of slag, 400 parts of steel slag aggregate, 4.5 parts of sodium sulfate and 36 parts of water; the coarse aggregate is converter steel slag coarse aggregate.
The granularity interval of the converter slag coarse aggregate is (4.75, 9.50 mm), and the converter slag coarse aggregate is soaked for more than 12 hours before being used, and then taken out and air-dried to a saturated surface dry state.
The flow coefficient test method in this embodiment is the same as that of example 1.
The slump test method in this example is the same as that of example 1.
Example 5
In the embodiment, the pervious concrete comprises the following raw materials in parts by weight: 30 parts of steel slag, 70 parts of slag, 400 parts of steel slag aggregate, 4.5 parts of sodium sulfate and 40 parts of water; the coarse aggregate is converter steel slag coarse aggregate.
The granularity interval of the converter slag coarse aggregate is (4.75, 9.50 mm), and the converter slag coarse aggregate is soaked for more than 12 hours before being used, and then taken out and air-dried to a saturated surface dry state.
The flow coefficient test method in this embodiment is the same as that of example 1.
The slump test method in this example is the same as that of example 1.
Example 6
In the embodiment, the pervious concrete comprises the following raw materials in parts by weight: 100 parts of cement, 400 parts of coarse aggregate and 36 parts of water; the coarse aggregate is granite aggregate.
The granularity interval of the granite aggregate is (4.75, 9.50 mm), and the granite aggregate is soaked for more than 12 hours before being used, and then is taken out and air-dried to a saturated surface dry state.
The flow coefficient test method in this embodiment is the same as that of example 1.
The slump test method in this example is the same as that of example 1.
Example 7
In the embodiment, the pervious concrete comprises the following raw materials in parts by weight: 100 parts of cement, 400 parts of coarse aggregate and 40 parts of water; the coarse aggregate is granite aggregate.
The granularity interval of the granite aggregate is (4.75, 9.50 mm), and the granite aggregate is soaked for more than 12 hours before being used, and then is taken out and air-dried to a saturated surface dry state.
The flow coefficient test method in this embodiment is the same as that of example 1.
The slump test method in this example is the same as that of example 1.
Example 8
In the embodiment, the pervious concrete comprises the following raw materials in parts by weight: 100 parts of cement, 400 parts of coarse aggregate and 44 parts of water; the coarse aggregate is granite aggregate. The granularity interval of the granite aggregate is (4.75, 9.50 mm), and the granite aggregate is soaked for more than 12 hours before being used, and then is taken out and air-dried to a saturated surface dry state.
The flow coefficient test method in this embodiment is the same as that of example 1.
The slump test method in this example is the same as that of example 1.
According to the requirements of the Chinese national standard GB/T50081-2016 "ordinary concrete mechanical property test method Standard", a cube sample with the dimensions of 100mm multiplied by 100mm is selected to test the 28d compressive strength of the pervious concrete. Penetration performance test was carried out by a constant head method with reference to annex A of CJJ/T135-2009 technical Specification for Water permeable Cement concrete pavement. The test piece is a cylinder with the diameter of 100mm and the height of 200 mm. The results of the tests for flow coefficient, slump, compressive strength and permeability coefficient are shown in Table 1.
TABLE 1
According to the invention, the fluidity of the pervious concrete is represented according to the distribution difference of the cementing materials of the pervious concrete, the actual fluidity of the pervious concrete can be accurately represented by the test result, the mixing ratio of the pervious concrete can be optimized, and the problem that the existing slump meter is not suitable for detecting the fluidity of the pervious concrete is solved. The fluidity testing efficiency and accuracy of the pervious concrete are remarkably improved, and the engineering quality effect of the pervious concrete is improved.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the invention in any way, and any person skilled in the art may make modifications or alterations to the disclosed technical content to the equivalent embodiments. However, any simple modification, equivalent variation and variation of the above embodiments according to the technical substance of the present invention still fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. The utility model provides a fluidity testing arrangement of concrete permeates water which characterized in that: comprises a sleeve (1), an upper layer cylinder component (2), a middle layer cylinder component (3), a lower layer groove component (4), a weighing container (5) and an auxiliary drag hook (6); the sleeve (1) comprises a bottom plate (7), a left side plate (8), a right side plate (9), a front panel (10) and a rear panel (11); grooves (12) for vertically inserting a front panel (10) are formed in the front sides of the inner walls of the left side plate (8) and the right side plate (9); the front panel (10) realizes vertical sliding disassembly and assembly through the groove (12); at least three convex fixing belts (14) extending forwards and backwards are vertically distributed on the inner walls of the left side plate (8) and the right side plate (9); fixing grooves (15) which are used for correspondingly inserting the fixing belts (14) back and forth are formed in the left side and the right side of the upper layer cylinder member (2), the middle layer cylinder member (3) and the lower layer groove member (4); auxiliary holes (16) are formed in the front sides of the upper layer cylinder member (2), the middle layer cylinder member (3) and the lower layer groove member (4); the weighing container (5) is of a box body structure with an unsealed top, and an inclined side panel (18) which is inclined by 45 degrees from bottom to top to back is arranged at the rear side of the weighing container (5); the height of the weighing container (5) is the same as the height of the lower groove-shaped component (4).
2. The fluidity testing device for pervious concrete according to claim 1, wherein: the upper layer cylinder member (2) and the middle layer cylinder member (3) are both in cylinder structures with upper and lower openings.
3. The fluidity testing device for pervious concrete according to claim 1, wherein: the wall thicknesses of the cylinder walls of the upper layer cylinder member (2), the middle layer cylinder member (3) and the lower layer groove member (4) are the same.
4. The fluidity testing device for pervious concrete according to claim 1, wherein: the height of the upper layer cylinder member (2) is 1/3-1/2 of the height of the middle layer cylinder member (3); the height of the middle layer cylinder component (3) is the same as that of the lower layer groove component (4).
5. The fluidity testing device for pervious concrete according to claim 1, wherein: the lower groove-shaped component (4) is of a box body structure with the top not closed.
6. The fluidity testing device for pervious concrete according to claim 1, wherein: the shape of auxiliary drag hook (6) is T shape, two tractive separation blades (1601) have all been set firmly to the hole reason of auxiliary hole (16) on the diametric symmetry, and the clearance between two tractive separation blades (1601) is used for auxiliary drag hook (6) tractive quarter butt (601) to insert, and tractive quarter butt (601) are fixed in auxiliary drag hook (6) straight-bar one end, and the fixed tractive extension rod (602) of the other end of straight-bar is used for holding.
7. The fluidity testing device for pervious concrete according to claim 1, wherein: the left side plate (8), the right side plate (9) and the rear panel (11) are fixedly connected with the bottom plate (7).
8. The fluidity testing device for pervious concrete according to claim 1, wherein: the outside of the front panel (10) is provided with a boosting handle (17), and the front panel (10) can be disassembled and assembled through the boosting handle (17).
9. The fluidity testing device for pervious concrete according to claim 1, wherein: the outer side walls of the left side plate (8) and the right side plate (9) are respectively provided with a handle (13).
10. A method of testing a device for testing the flowability of a pervious concrete according to any one of claims 1 to 9, comprising the steps of:
step one: the mass of the lower trough-shaped component (4) and the weighing container (5) are respectively marked as m 1 And m 2 The method comprises the steps of carrying out a first treatment on the surface of the Coating release agent on the fixing belt (14) and the fixing groove (15), and then coating the lower layer groove type component (4) and the middle layer cylinder component(3) The upper layer cylinder member (2) is sequentially put into the sleeve (1) and is sealed with the front panel (10);
step two: filling pervious concrete into the lower layer groove-shaped component (4), the middle layer cylinder-shaped component (3) and the upper layer cylinder-shaped component (2) respectively, and tamping the pervious concrete from outside to inside by a tamping rod clockwise after each filling; after filling, redundant pervious concrete on the upper surface of the upper layer cylinder member (2) is scraped off, so that the filling height of the pervious concrete and the upper edge of the upper layer cylinder member (2) are kept at the same horizontal plane;
step three: placing the testing device filled with the permeable concrete on a vibrating table, and vibrating for a few seconds by adopting vibration; after the vibration is finished, the upper layer cylinder member (2) is pulled out through the auxiliary drag hook (6) and the auxiliary hole (16);
step four: clamping the upper edge of the rear side of the weighing container (5) between the left side plate (8) and the right side plate (9), and enabling the upper edge of the rear side of the inclined side plate (18) to be tightly attached to the lower groove-shaped member (4); pulling out the middle layer cylinder component (3), loading the permeable concrete in the middle layer cylinder component (3) into a weighing container (5), and weighing the permeable concrete and the total mass of the weighing container (5) to be m 3 The method comprises the steps of carrying out a first treatment on the surface of the Then the lower layer trough-shaped component (4) is pulled out, and the total mass of the lower layer trough-shaped component (4) and the permeable concrete is recorded as m 4 ；
Step five: the flow coefficient γ is calculated using the following:
the test mode is adopted to perform three tests to obtain gamma 1 、γ 2 、γ 3 Average outThe method is used for judging the flow property of the pervious concrete; the water permeable concrete flow performance judgment standard is as follows:
when gamma is less than 0.90, the flow property is too high;
when gamma is more than or equal to 0.90 and less than 1.0, the flow property is good;
when γ=1.0, the flow properties are too low;
when gamma is more than 1.0, the test result is invalid, and the test is repeated until gamma is less than or equal to 1.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211168389.1A CN115468876B (en) | 2022-09-24 | 2022-09-24 | Fluidity testing device and method for pervious concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211168389.1A CN115468876B (en) | 2022-09-24 | 2022-09-24 | Fluidity testing device and method for pervious concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115468876A CN115468876A (en) | 2022-12-13 |
| CN115468876B true CN115468876B (en) | 2023-12-29 |
Family
ID=84335084
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211168389.1A Active CN115468876B (en) | 2022-09-24 | 2022-09-24 | Fluidity testing device and method for pervious concrete |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115468876B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008197013A (en) * | 2007-02-14 | 2008-08-28 | Ube Ind Ltd | Flowability evaluation test method for concrete, and device therefor |
| JP2009281798A (en) * | 2008-05-21 | 2009-12-03 | Ube Ind Ltd | Method and apparatus for evaluating and testing flowability of concrete |
| WO2015030051A1 (en) * | 2013-09-02 | 2015-03-05 | NAKAGOMI Hideki | Porous concrete having fluidity |
| KR101614804B1 (en) * | 2014-10-14 | 2016-04-22 | 한국건설기술연구원 | Permeability Test Method and Apparatus for Self Healing Concrete |
| CN106706497A (en) * | 2017-01-11 | 2017-05-24 | 东南大学 | Device and method for evaluating working performance of freshly-mixed pervious concrete |
| CN107576781A (en) * | 2017-09-15 | 2018-01-12 | 中国葛洲坝集团勘测设计有限公司 | A kind of device and method for determining pervious concrete service behaviour |
| CN210665392U (en) * | 2019-07-09 | 2020-06-02 | 福建泉州市宝质混凝土有限公司 | Concrete fluidity testing device |
| CN111474330A (en) * | 2020-04-23 | 2020-07-31 | 中铁隧道局集团有限公司 | Performance determination method for high-fluidity concrete in tunnel lining |
| CN217059815U (en) * | 2021-08-23 | 2022-07-26 | 莱芜鲁碧商品混凝土有限公司 | Be used for concrete product mobility performance detection device |
-
2022
- 2022-09-24 CN CN202211168389.1A patent/CN115468876B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008197013A (en) * | 2007-02-14 | 2008-08-28 | Ube Ind Ltd | Flowability evaluation test method for concrete, and device therefor |
| JP2009281798A (en) * | 2008-05-21 | 2009-12-03 | Ube Ind Ltd | Method and apparatus for evaluating and testing flowability of concrete |
| WO2015030051A1 (en) * | 2013-09-02 | 2015-03-05 | NAKAGOMI Hideki | Porous concrete having fluidity |
| KR101614804B1 (en) * | 2014-10-14 | 2016-04-22 | 한국건설기술연구원 | Permeability Test Method and Apparatus for Self Healing Concrete |
| CN106706497A (en) * | 2017-01-11 | 2017-05-24 | 东南大学 | Device and method for evaluating working performance of freshly-mixed pervious concrete |
| CN107576781A (en) * | 2017-09-15 | 2018-01-12 | 中国葛洲坝集团勘测设计有限公司 | A kind of device and method for determining pervious concrete service behaviour |
| CN210665392U (en) * | 2019-07-09 | 2020-06-02 | 福建泉州市宝质混凝土有限公司 | Concrete fluidity testing device |
| CN111474330A (en) * | 2020-04-23 | 2020-07-31 | 中铁隧道局集团有限公司 | Performance determination method for high-fluidity concrete in tunnel lining |
| CN217059815U (en) * | 2021-08-23 | 2022-07-26 | 莱芜鲁碧商品混凝土有限公司 | Be used for concrete product mobility performance detection device |
Non-Patent Citations (2)
| Title |
|---|
| 新拌高性能混凝土流动性测试方法探讨;苏志学;胡小芳;;广东建材(第02期);全文 * |
| 高流动性混凝土工作性能试验方法研究;赵卓;唐伟东;张鹏;;建筑科学(第05期);全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115468876A (en) | 2022-12-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Muller et al. | A reassessment of mercury intrusion porosimetry by comparison with 1H NMR relaxometry | |
| Akkaya et al. | Investigation of the density, porosity, and permeability properties of pervious concrete with different methods | |
| Lura et al. | Measurement of water transport from saturated pumice aggregates to hardening cement paste | |
| CN205049440U (en) | Vibration frequency and vigorous consistometer of ballast quality adjustable dimension | |
| JP2008197013A (en) | Flowability evaluation test method for concrete, and device therefor | |
| CN115468876B (en) | Fluidity testing device and method for pervious concrete | |
| CN108169463B (en) | Method for detecting working performance of pervious concrete based on slurry rheology | |
| Zhao et al. | Models for strength prediction of high-porosity cast-in-situ foamed concrete | |
| Cebeci | Pore structure of air-entrained hardened cement paste | |
| Spence | Predicting the performance of soil-cement as a building material in tropical countries | |
| CN218470456U (en) | Fluidity testing device for pervious concrete | |
| CN211426501U (en) | Concrete workability testing arrangement permeates water | |
| Fernández-Fanjul et al. | A new methodology for determining water absorption of lightweight, normal-weight and heavyweight aggregates in a viscous medium | |
| Kwan et al. | Effects of CSF content on rheology and cohesiveness of mortar | |
| JP5248195B2 (en) | Concrete fluidity evaluation test method and apparatus | |
| CN108051355A (en) | One kind newly mixes cement-based material testing permeability device | |
| CN107144467A (en) | A kind of preparation method of rectangular steel pipe broken brick aggregate regeneration concrete test specimen | |
| CN113063929A (en) | Method for testing uniformity of steel fibers in ultrahigh-performance concrete | |
| CN110879190A (en) | Portable working degree tester and testing method for working degree of cemented sand gravel | |
| De Brabandere et al. | Influencing factors to the capillary water uptake of (un) cracked cementitious materials | |
| Derogar | Effect of zeolite on dewatering, mechanical properties and durability of cement mortar | |
| CN217688428U (en) | Concrete slump tester | |
| Kubissa et al. | Air permeability and sorptivity of concrete modified with viscosity modifying agents | |
| CN217931245U (en) | Testing device for semi-flexible composite concrete pouring rate | |
| CN113433032B (en) | Cement concrete mixture pressure expansion degree variation test and evaluation method |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |