CN107796744A - It is a kind of to be used to test the new device and method for mixing pervious concrete workability - Google Patents
It is a kind of to be used to test the new device and method for mixing pervious concrete workability Download PDFInfo
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- CN107796744A CN107796744A CN201710965302.6A CN201710965302A CN107796744A CN 107796744 A CN107796744 A CN 107796744A CN 201710965302 A CN201710965302 A CN 201710965302A CN 107796744 A CN107796744 A CN 107796744A
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- pervious concrete
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- workability
- concrete
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- 239000011380 pervious concrete Substances 0.000 title claims abstract description 64
- 238000012360 testing method Methods 0.000 title claims abstract description 29
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000002156 mixing Methods 0.000 title claims abstract description 11
- 239000004567 concrete Substances 0.000 claims abstract description 16
- 238000013461 design Methods 0.000 claims abstract description 7
- 238000010998 test method Methods 0.000 claims abstract description 6
- 238000007667 floating Methods 0.000 claims abstract description 5
- 238000010191 image analysis Methods 0.000 claims abstract description 5
- 238000003384 imaging method Methods 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 229920005479 Lucite® Polymers 0.000 claims description 2
- 238000009434 installation Methods 0.000 claims description 2
- 239000004926 polymethyl methacrylate Substances 0.000 claims description 2
- 238000002834 transmittance Methods 0.000 claims description 2
- 238000011156 evaluation Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000012113 quantitative test Methods 0.000 abstract 1
- 238000011160 research Methods 0.000 abstract 1
- 239000002002 slurry Substances 0.000 description 21
- 239000010410 layer Substances 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 239000002689 soil Substances 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 238000005204 segregation Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000002562 thickening agent Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000013441 quality evaluation Methods 0.000 description 1
- 238000011002 quantification Methods 0.000 description 1
- 238000011158 quantitative evaluation Methods 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 239000011800 void material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/088—Investigating volume, surface area, size or distribution of pores; Porosimetry
-
- 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
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- Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Dispersion Chemistry (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
It is used to test the new device and method for mixing pervious concrete workability the present invention relates to a kind of.The device is made up of two independent parts --- sample container, imaging and image analysis apparatus.During test, two layers of loading sample container of pervious concrete point is mixed by new, control pervious concrete test block unit weight consistent with design unit weight after plugging and pounding twice, its surface is floating, close the cover after vibration, focus on the picture of concrete plane and definition not less than 720P from sample container top and bottom shooting respectively and count its porosity respectively as pervious concrete Evaluation on Workability index by the use of software.The method of the present invention for being used to testing pervious concrete workability can with quantitative test pervious concrete after vibration layer porosity difference up and down, reflect the workability of pervious concrete.The present invention provides a science simplicity, accurately and effectively method of testing for the academic research of pervious concrete and quality of production control.
Description
Technical field
The invention belongs to pervious concrete technical field of performance test, is surveyed more particularly to a kind of pervious concrete workability
Method for testing.
Background technology
Pervious concrete is as a kind of environmental permeable pavement material, since the last century, just by prosperities such as American-European Japan
Countries use is in the problem of groundwater for solving rainwater covering exhaustive exploitation.
As China promotes sponge urban construction, pervious concrete also will increasingly turn into a study hotspot.Permeable coagulation
Soil is because having the characteristics that the slump is small, paste content is few and internal void is more, and causing concrete, slurry loses easily caused by dehydration
Remove gelling, the engineering time is shorter；Such as produced using premixing mode, loading and unloading and the pouring construction of concrete, which are required to it, to be had
Certain fluidity, and inevitably jolting, vibrate in transportation etc. influences, and is easily caused slurry sinking, aggregate segregation etc.
Phenomenon, concrete strength or water penetration is caused to meet design objective.As can be seen here, the working condition of pervious concrete will very
Influence its production and construction and hardening military service performance to big degree.Therefore, the workability of accurate evaluation pervious concrete is association
Adjust the important prerequisite of its mechanics and water permeability.
At present both at home and abroad to newly mixing the evaluation of pervious concrete working condition, mainly adopt and be held by hand pockets of method and judge,
This method lacks quantizating index, is influenceed by the subjective factor of operator.There are domestic scholars Japanese cement association and day
The denseness evaluation method of this road community, the change ascending according to the ratio of mud, is divided into the state for newly mixing pervious concrete
Evaluation index of five grades as service behaviour, but it is only applicable to the pervious concrete without using additive and without standard measure table
Sign；Foreign scholar when making clear of water coagulation soil workability, it was also found that suitable for characterize normal concrete yield stress and modeling
Property viscosity can not measure in pervious concrete.Foundation newly mixes pervious concrete workability quantitative evaluation method, both contributes to
Quality control prepared by the autochthonal production of water coagulation, while also method foundation will be provided for pervious concrete workability accuracy controlling, it is right
It is most important in the exploitation and application of pervious concrete technology.
201610156319.2 disclosing a kind of pervious concrete workability measure device and method of testing, it invents main
It is to have used for reference the vigorous denseness method of dimension in normal concrete consistency testing method, original vibrating bottom is adjusted to top vibration.
This method is only applicable to slurry, aggregate and the equally distributed pervious concrete of hole, is homogeneous with normal concrete interior visible
Difference, premixing pervious concrete are likely to occur slurry and aggregate separated, then because it has larger mobility in vibration processes
Its concrete height change is no longer only influenceed by denseness, and loose slide of aggregate for lacking slurry parcel also results in pervious concrete
Survey the change of " denseness " index.
201611231212.6 a kind of experimental rig and method for evaluating pervious concrete service behaviour is disclosed, by shaking
Through its service behaviour of the slurry quality evaluation of pervious concrete bottom after dynamic.Certain limitation be present in this method：For slurry
Body has certain trend to flow downward, however not yet the grid of permeability test bottom of device when, pass through this covering device and side
Method simultaneously can not evaluate its workability size.
The content of the invention
To solve the problems, such as detecting instrument that existing pervious concrete service behaviour characterizes without quantification, the present invention provides one
The experimental rig and method of kind evaluation pervious concrete service behaviour.
Pervious concrete belongs to dry concrete, and its internal aggregate is close to closest packing state, it is difficult to possess mobility,
So the new of pervious concrete mixes state size and is mainly reflected in its slurry rheology characteristic.Usually, with slurry fluidity
Increase, slurry, which easily flows downward, causes the porosity of pervious concrete up-down structure difference occur (upper layer porosity becomes big, lower floor
Porosity diminishes)；However, when slurry is provided simultaneously with large fluidity and high cohesion (after using thickener), even if it flows
Dynamic degree is larger, and slurry also tightly package aggregate can be not susceptible to flow downward, and cause the hole of pervious concrete up-down structure
Rate is without significant difference.Therefore, by directly testing the new difference for mixing interlayer porosity above and below pervious concrete, can intuitively reflect
The size of pervious concrete service behaviour.
The device of the present invention that pervious concrete workability is newly mixed for testing, including independent two parts, one
It is sample container, two is imaging and image analysis apparatus.
Described sample container is interior length of side 150mm open cube and square lid more than length of side 150mm；Institute
The open cubical bottom stated, and square lid are that lucite of the light transmittance more than 95% is made；
Described imaging and image analysis apparatus include can image-capturing resolution be not less than the camera installations of 720P pictures, and
Computer that can be connected.
It is described to be used to test the new test method for mixing pervious concrete workability, comprise the following steps：To newly it mix permeable mixed
Solidifying two layers of loading sample container of soil point, every layer installs and is plugged and pounded 25 times with tamper ecto-entad respectively, is controlled after plugging and pounding twice permeable
Concrete test block unit weight is consistent with design unit weight, and its surface is floating；Sample container is placed in and meets what GB/T 25650 was required
On shake table, time of vibration t (10s-300s)；Sample container lid is closed, under conditions of bright and clear, is held respectively from sample
Device top and bottom shooting focus on concrete plane and definition is not less than 720P picture；
Using software picture is optimized and binary conversion treatment after, statistics obtain pervious concrete top layerAnd bottom
Porosity
The software includes Adobe Photoshop and Image Pro Plus.
Beneficial effect：Contrasted with existing test device and method, experimental rig of the present invention and method are new except that can evaluate
Mix beyond pervious concrete workability size, can also be judged by porosity test result permeable after pervious concrete hardening
Performance and mechanical property scope.
Embodiment
First, the pervious concrete match ratio of foundation design is prepared, and new will be mixed two layers of loading sample of pervious concrete point and be held
Device, every layer is installed and is plugged and pounded 25 times with tamper ecto-entad respectively, and pervious concrete test block unit weight and design are controlled after plugging and pounding twice
Unit weight is consistent, and its surface is floating；Sample container is placed in and meets time of vibration t on shake table that GB/T 25650 is required
(10s-300s)；Sample container lid is closed, it is poly- from sample container top and bottom shooting respectively under conditions of bright and clear
Jiao is not less than 720P picture in concrete plane and definition；It is soft using Adobe Photoshop and Image Pro Plus
Part picture is optimized and binary conversion treatment after, statistics obtain pervious concrete top layerWith bottom porosityIn addition,
While porosity is tested, separately take new pervious concrete of mixing to cross 4.75mm sieves, take out wherein slurry and according to GB/T2419-
2005 test its fluidity, and using the rheological property of soft solid rheometer test slurry.
Embodiment：
1st, pervious concrete match ratio
Pervious concrete match ratio (the kg/m of table 13)
2nd, test method
Pervious concrete is prepared according to match ratio in table 1, new will mix two layers of loading sample container of pervious concrete point, every layer
Install and plugged and pounded 25 times with tamper ecto-entad respectively, pervious concrete test block unit weight and design unit weight one are controlled after plugging and pounding twice
Cause, its surface is floating；Sample container is placed in and meets time of vibration 120s on shake table that GB/T 25650 is required；Close examination
Sample container lid, under conditions of bright and clear, respectively from sample container top and bottom shooting focus on concrete plane and
Definition is 720P picture；Picture is optimized using Adobe Photoshop and Image Pro Plus softwares and two
After value processing, statistics obtains pervious concrete top layerWith bottom porosityIn addition, while porosity is tested,
It is another to take new pervious concrete of mixing to cross 4.75mm sieves, take out wherein slurry and its fluidity is tested according to GB/T2419-2005, and adopt
With the rheological property of soft solid rheometer test slurry.
3rd, test result
The pervious concrete workability test result of table 2
* note：Test result is to sift out slurry to account in sample container the percentage for loading pervious concrete quality.
Table 2 is pervious concrete workability test result, and wherein 1# is traditionally method --- hand, which is grabbed, agglomerating judges it
Workability understands that a small amount of slurry only occur flows downward in zone of reasonableness, according to top layer and bottom porosity test result, permeable
Hole distribution of results is uniform up and down for concrete；2# is that water reducer dosage is further improved on the basis of 1#, and increase is newly mixed permeable mixed
Native workability is coagulated, can be found that serious slurry sinks to the bottom and only had with aggregate segregation state, concrete base by porosity result
A small amount of hole；3# was then suitably to increase thickener on the basis of 2#, improves the cohesiveness of pervious concrete, through vibration 2 minutes
Slurry almost no longer flows downward in pervious concrete afterwards；4# is to continue to improve water reducer volume on the basis of 3#, is made permeable mixed
There is the obvious trend that flows downward in slurry in solidifying soil, however use test method test result in 201611231212.6 still for
0%.
Claims (3)
1. a kind of be used to test the new device for mixing pervious concrete workability, it is characterised in that including two independent parts, one
It is sample container, two is imaging and image analysis apparatus.
Described sample container is interior length of side 150mm open cube and square lid more than length of side 150mm；Described
Open cubical bottom, and square lid are that lucite of the light transmittance more than 95% is made；
Described imaging and image analysis apparatus include can image-capturing resolution be not less than the camera installations of 720P pictures, and can be with
The computer being connected.
2. it is used for the test method for testing the new device for mixing pervious concrete workability described in claim 1, it is characterised in that bag
Include following steps：
It new will mix two layers of loading sample container of pervious concrete point, every layer installs and plugs and pounds 25 times with tamper ecto-entad respectively, and two
It is secondary plug and pound after control pervious concrete test block unit weight with design unit weight it is consistent, its surface is floating；
Sample container is placed in and met on shake table that GB/T 25650 is required, vibrates 10s-300s；Sample container lid is closed,
Under conditions of bright and clear, concrete plane is focused on and definition is not less than from sample container top and bottom shooting respectively
720P picture；
Using software picture is optimized and binary conversion treatment after, statistics obtain pervious concrete top layerWith bottom hole
Rate
3. according to the method for claim 2, it is characterised in that the software includes Adobe Photoshop and Image
Pro Plus。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710965302.6A CN107796744A (en) | 2017-10-17 | 2017-10-17 | It is a kind of to be used to test the new device and method for mixing pervious concrete workability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710965302.6A CN107796744A (en) | 2017-10-17 | 2017-10-17 | It is a kind of to be used to test the new device and method for mixing pervious concrete workability |
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| Publication Number | Publication Date |
|---|---|
| CN107796744A true CN107796744A (en) | 2018-03-13 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710965302.6A Pending CN107796744A (en) | 2017-10-17 | 2017-10-17 | It is a kind of to be used to test the new device and method for mixing pervious concrete workability |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111751181A (en) * | 2020-06-28 | 2020-10-09 | 广西交科集团有限公司 | Pervious concrete slurry uniformity evaluation model and evaluation method |
| CN113125338A (en) * | 2019-12-31 | 2021-07-16 | 悉地（苏州）勘察设计顾问有限公司 | Quantitative testing device and method for cohesive force between pervious concrete aggregate and slurry |
| CN113804864A (en) * | 2021-10-13 | 2021-12-17 | 江苏奥莱特新材料股份有限公司 | Method for testing air entraining performance of air entraining agent for concrete |
| CN113933202A (en) * | 2021-10-12 | 2022-01-14 | 福州大学 | Pervious concrete work performance testing device and method based on mixture cohesiveness |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596911A (en) * | 2015-02-05 | 2015-05-06 | 山东大学 | Method for detecting character of pores of pervious concrete by processing images |
-
2017
- 2017-10-17 CN CN201710965302.6A patent/CN107796744A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104596911A (en) * | 2015-02-05 | 2015-05-06 | 山东大学 | Method for detecting character of pores of pervious concrete by processing images |
Non-Patent Citations (3)
| Title |
|---|
| 姜骞等: ""浆体新拌性能与透水混凝土硬化性能的相关性"", 《道客巴巴》 * |
| 姜骞等: ""预拌透水混凝土在某停车场工程中的应用"", 《江苏建筑》 * |
| 建筑设计标准: ""DB11T775-2010透水混凝土路面技术规程"", 《豆丁建筑》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125338A (en) * | 2019-12-31 | 2021-07-16 | 悉地（苏州）勘察设计顾问有限公司 | Quantitative testing device and method for cohesive force between pervious concrete aggregate and slurry |
| CN113125338B (en) * | 2019-12-31 | 2023-03-24 | 悉地（苏州）勘察设计顾问有限公司 | Quantitative testing device and method for cohesive force between pervious concrete aggregate and slurry |
| CN111751181A (en) * | 2020-06-28 | 2020-10-09 | 广西交科集团有限公司 | Pervious concrete slurry uniformity evaluation model and evaluation method |
| CN113933202A (en) * | 2021-10-12 | 2022-01-14 | 福州大学 | Pervious concrete work performance testing device and method based on mixture cohesiveness |
| CN113804864A (en) * | 2021-10-13 | 2021-12-17 | 江苏奥莱特新材料股份有限公司 | Method for testing air entraining performance of air entraining agent for concrete |
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Application publication date: 20180313 |
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