CN203350158U - Permeability coefficient testing device of pervious cement concrete - Google Patents
Permeability coefficient testing device of pervious cement concrete Download PDFInfo
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- CN203350158U CN203350158U CN 201320323653 CN201320323653U CN203350158U CN 203350158 U CN203350158 U CN 203350158U CN 201320323653 CN201320323653 CN 201320323653 CN 201320323653 U CN201320323653 U CN 201320323653U CN 203350158 U CN203350158 U CN 203350158U
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Abstract
The utility model relates to the technical field of civil engineering material testing, in particular to a permeability coefficient testing device of pervious cement concrete. The permeability coefficient testing device comprises a cylinder, a three-petal mold tightly and fixedly connected with the lower end of the cylinder, and an overflow water tank, wherein the thicknesses of an upper wall and a lower wall of the cylinder are the same; the inner diameter of the three-petal mold is the same as that of the cylinder; the three-petal mold is formed by splicing three cylindrical mold petals; the three mold petals are sleeved with a hoop; an annular platform is arranged in the middle of an inner ring of the three-petal mold; circular holes at the same height are uniformly formed at the lower part of the three-petal mold; an overflow water tank overflow port is formed at the upper part of the overflow water tank; and a cylinder overflow port is formed at the upper part of the cylinder and connected with the outside of the overflow water tank by a pipeline. The testing device has the benefits that the testing device can be used for testing a permeation coefficient of the pervious concrete, a rubber washer between the cylinder and the three-petal mold ensures sealability of the side face, the measurement accuracy of the permeation coefficient is improved, and the testing device is convenient and quick to mount and dismount.
Description
Technical field
The utility model relates to the engineering materials technical field of measurement and test, relates in particular to a kind of water-permeable cement concrete device for testing permeability coefficient.
Background technology
Development along with urban construction, the modern city road surface is covered by water tight concrete gradually, when means of transportation bring convenience to people easily, because waterproof pavement lacks water-permeable and air permeable, brought certain negative effect as " thermal conductance effect ", the rainwater underground land subsidence that causes that can not reflux in time, surface gathered water reduces security and the comfortableness of traffic when raining heavyly.
Pervious concrete claims again cellular concrete, permeable terrace, it is a kind of porous light concrete formed by aggregate, cement and water mixing, it is not containing fine aggregate, coating the skim grout by the coarse aggregate surface mutually bonds and forms the equally distributed cellular structure in hole, therefore there are ventilative, permeable and lightweight characteristics, also can claim non-fine concrete.It is the defect for the road surface of former urban road by American-European, Japan and other countries, and application a kind of can allow under the rainwater inflow place, effective recharge of groundwater, some Urban Environmental Problems that the underground water table of alleviating city sharply descends etc.And can effectively eliminate the harm of the environmental pollutions such as ground oils compound; Simultaneously, be the good pavement material of protection underground water, maintaining ecological balance, energy alleviating urban heat island effect; It is conducive to, in the benign development and the work such as urban rainwater management and water prevention and cure of pollution of environment for human survival, to have special significance.
Pervious concrete, as a kind of concrete of ecological, environmental protective, can meet the requirement on light-duty road surface.Water-permeable cement concrete is required to meet the requirement of resistance to compression, anti-folding and water permeability.Water permeability is the important indicator of pervious concrete.
Soil cement device for determining permeation coefficient and assay method that publication number is 101738363A, this determinator is mainly measured the less sample of coefficient of permeability value of soil cement etc., for this type coefficient of permeability of water-permeable cement concrete than the test of the large several order of magnitude samples of soil cement, be not suitable for using this device to test, this device relates to confined pressure control system, back-pressure control system, pore water pressure Force control system simultaneously, system pipeline is many, the equipment complexity.
A kind of water permeability permeation coefficient of permeable concrete analyzer and method of testing that publication number is CN102183445A, this determinator is after finishing experiment, and dismounting is inconvenient, and the sealing consumable material is many and sealing is not good, easily infiltration from the side.
The utility model content
The technical problems to be solved in the utility model is: for understanding in prior art complex structure and the not good technical matters of sealing of the coefficient of permeability proving installation of determining, the utility model provides a kind of water-permeable cement concrete device for testing permeability coefficient.
The utility model solves the technical scheme that its technical matters adopts: a kind of water-permeable cement concrete device for testing permeability coefficient, for measuring columniform water-permeable cement concrete sample, this sample outer ring is enclosed with rubber diaphragm, device comprises the transparent cylinder that lower wall thickness is consistent, be sealedly and fixedly connected at three lobe moulds and the overflow tank consistent with internal diameter cylinder the cylinder lower end, described cylinder and three lobe moulds all are arranged in the overflow tank, described three lobe moulds are cylindric and consist of the amalgamation of three mould lobes, three mould lobes are set with hoop outward, three lobe mould inner ring middle parts also are provided with the annulus platform, be laid with circular hole on the sustained height of described three lobe mould bottoms, described overflow tank top offers overflow tank overflow vent, the top of described cylinder offers the cylinder overflow vent, the cylinder overflow vent is connected to outside the overflow tank by pipeline, the height of described overflow tank overflow vent is higher than the height of three lobe moulds, the height of cylinder overflow vent is higher than the height of overflow tank overflow vent.The technical program is used for testing the coefficient of permeability of pervious concrete, proving installation top is a cylinder, the cylinder lower end is sample, sample is by the rubber pattern environmental sealing, and then with three lobe moulds and hoop, sample holder is held, the three lobe moulds by bottom support the weight of top water and the weight of sample, and the rubber washer between cylinder and three lobe moulds has guaranteed the sealing of side, improve the precision that coefficient of permeability is measured, and easy installation and removal, quick.
In order to guarantee that cylinder is good with the sealing that three lobe moulds are connected, the external diameter of described three lobe moulds all is greater than the external diameter of cylinder, outer ring, described cylinder lower end upwards is provided with the fastening wing plate of symmetrical cylinder in same footpath, described three lobe mould upper surfaces are greater than on the part of cylinder outer ring, integrative-structure is provided with the fastening wing plate of three lobe moulds, the fastening wing plate of described three lobe mould matches with the fastening wing plate of cylinder, form step between the fastening wing plate of described three lobe mould and three lobe mould upper surfaces, the upper surface of described three lobe moulds also is equipped with rubber washer, rubber washer is positioned at the fastening wing plate of three lobe moulds inboard.
In order to guarantee to be connected up and down closely, the length L of described step is consistent with the wall thickness of cylinder.
In order to guarantee that three lobe moulds have constant weight play the effect of supporting top and avoid getting rusty, described three lobe moulds adopt stainless steel or brass.
For the ease of clamping hoop, the middle part, outer ring of described three lobe moulds has for placing the platform of hoop.
Unimpeded for the ease of current, as preferably, on described each mould lobe, be provided with 3 circular holes.
The using method of use for laboratory water-permeable cement concrete device for testing permeability coefficient of the present utility model, comprise the steps:
A, to get sectional area be A, is highly the water-permeable cement concrete sample of L, by becoming the mould cylinder, Rubber membrane cover is contained on sample;
B, again by the amalgamation of three mould lobes in the sample outside, hoop on suit, make three mould lobes be close to and clamp sample, forms three lobe moulds, hoop is connected on the hoop platform at outer ring middle part of three lobe moulds, the annulus platform at three lobe mould inwalls middle parts is held the sample bottom;
C, on three lobe mould upper surfaces, put into rubber washer, rubber washer can be entrapped on the step of the fastening wing plate of three lobe moulds inboard, again the cylinder lower end is placed on rubber washer, screw through the fastening wing plate of three lobe moulds and the fastening wing plate of cylinder, is made between cylinder and three lobe moulds and closely is connected;
D, the three lobe moulds that will be connected with cylinder are placed in the overflow tank, open the feed water valve valve, and current are entered in cylinder, and infiltrate in the overflow tank by this sample, when overflow tank overflow vent there are flowing out, adjust inflow, make the water level in cylinder be no more than the cylinder overflow vent;
E, when the output of t overflow tank overflow vent discharge and feed water valve in second equates, the consumption socket joint is got the streamflow (Q) of overflow tank overflow vent t in second, and the difference H of the water level in the measurement cylinder and the water level in the overflow tank, H is accurate to 1mm, by the temperature T of water in thermometer measure overflow tank, T is accurate to 0.5 ℃;
F, repeat step e 3 times, get the mean value of Q, H, T,
Coefficient of permeability calculates as follows:
In formula
K
t---the infiltration coefficient of sample during water temperature T ℃, mm/s;
K
15---infiltration coefficient during 15 ℃ of standard temperatures, mm/s;
Q---the amount of seepage of time t in second, mm
3;
The thickness of L---sample, mm;
H---mean water is poor, mm;
T---the time, s.
η
t/ η
15---water temperature is respectively the coefficient of dynamic viscosity ratio of T ℃ of water during with 15 ℃;
After e, mensuration have finished, unclamp the connection trip bolt, cylinder and three lobe moulds are separated, hoop is taken off, take out sample, leave with after instrument is wiped clean.
In order to reduce error, improve the accuracy of experiment, the current that in described steps d, feed water valve provides adopt air free water.
The distance of setting annulus platform to three lobe mould upper surface is L, and the internal diameter of three lobe moulds is D, in described step a, specimen finish is that D thickness is L, at first by rubber sleeve on the suction hole that becomes the mould cylinder, then by Rubber membrane cover on film forming cylinder inwall, the two ends rubber diaphragm turns up, air-breathing by suction hole with rubber pipette bulb, make rubber diaphragm be close to into mould cylinder inwall, then from sample top suit film forming cylinder, make Rubber membrane cover on sample, then unclamp rubber pipette bulb, rubber diaphragm is adsorbed on sample, takes off into the mould cylinder.
The beneficial effects of the utility model are, water-permeable cement concrete device for testing permeability coefficient of the present utility model, can be used for testing the coefficient of permeability of pervious concrete, proving installation top is a cylinder, the cylinder lower end is sample, sample is by the rubber pattern environmental sealing, and then with three lobe moulds and hoop, sample holder is held, the three lobe moulds by bottom support the weight of top water and the weight of sample, rubber washer between cylinder and three lobe moulds has guaranteed the sealing of side, improve the precision that coefficient of permeability is measured, and easy installation and removal, quick.
The accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is the structural representation of the utility model water-permeable cement concrete device for testing permeability coefficient.
Fig. 2 is partial enlarged drawing in Fig. 1.
Fig. 3 is the structure vertical view of three lobe moulds in the utility model.
Fig. 4 is the structural representation that the utility model becomes the mould cylinder.
In figure: 1, cylinder, 1-1, cylinder overflow vent, 1-2, the fastening wing plate of cylinder, 2, three lobe moulds, 2-1, circular hole, 2-2, the fastening wing plate of three lobe moulds, 2-3, step, 3, the overflow tank, 3-1, overflow tank overflow vent, 4, annulus platform, 5, hoop, 6, rubber washer, 7, platform, 8, the feed water valve valve, 9, become the mould cylinder, 9-1, suction hole, 10, rubber diaphragm.
Embodiment
By reference to the accompanying drawings the utility model is described in further detail now.These accompanying drawings are the schematic diagram of simplification, basic structure of the present utility model only is described in a schematic way, so it only show the formation relevant with the utility model.
As Figure 1-4, embodiment of the present utility model, the water-permeable cement concrete device for testing permeability coefficient comprises the consistent cylinder of lower wall thickness 1, consistent three lobe moulds 2 and the overflow tank 3 at the internal diameter with cylinder 1 of cylinder 1 lower end is sealedly and fixedly connected, described cylinder 1 and three lobe moulds 2 all are arranged in overflow tank 3, three lobe moulds 2 are cylindric and consist of the amalgamation of three mould lobes, three mould lobes are set with hoop 5 outward, three lobe mould 2 inner ring middle parts also are provided with annulus platform 4, be laid with circular hole 2-1 on the sustained height of three lobe mould 2 bottoms, overflow tank 3 tops offer overflow tank overflow vent 3-1, the top of cylinder 1 offers cylinder overflow vent 1-1, cylinder overflow vent 1-1 is connected to outside overflow tank 3 by pipeline, the height of overflow tank overflow vent 3-1 is higher than the height of three lobe moulds 2, the height of cylinder overflow vent 1-1 is higher than the height of overflow tank overflow vent 3-1.
The external diameter of three lobe moulds 2 all is greater than the external diameter of cylinder 1, cylinder 1 outer ring, lower end upwards is provided with the fastening wing plate 1-2 of symmetrical cylinder in same footpath, three lobe mould 2 upper surfaces are greater than on the part of cylinder 1 outer ring, the fastening wing plate 2-2 of three lobe moulds that integrative-structure is provided with, the fastening wing plate 2-2 of three lobe moulds matches with the fastening wing plate 1-2 of cylinder, form step 2-3 between the fastening wing plate 2-2 of three lobe moulds and three lobe mould 2 upper surfaces, the upper surface of three lobe moulds 2 also is equipped with rubber washer 6, and rubber washer 6 is positioned at the fastening wing plate 2-2 of three lobe moulds inboard.The length h of step 2-3 is consistent with the wall thickness of cylinder 1.The middle part, outer ring of three lobe moulds 2 has the platform 7 for placing hoop 5.The bottom of each mould lobe evenly is provided with 3 circular hole 2-1.
In the present embodiment, cylinder 1 adopts transparent organic glass, the material of three lobe moulds 2 adopts stainless steel or brass, internal diameter is 100mm, read for convenience water level, cylinder 1 inwall is provided with the level scale chi, cylinder overflow vent 1-1 is apart from bottom of cylinder 150mm, be accurate to 1mm, the fastening wing plate 2-2 of three lobe moulds thickness is 8mm, the whole height of three lobe moulds is 70mm, internal diameter is 100mm, the external diameter of upper surface is 116mm, the segment thickness that three lobe mould 2 upper surfaces are greater than cylinder 1 outer ring is 2mm, for the ease of hoop, snap in, the outer ring of three lobe moulds 2 is thin ends and thick middle, its middle part also is provided with the platform 7 for placing hoop 5, overflow tank 3 be of a size of the overflow water flute length and wide be all 30cm, height 115mm, be provided with at tank sidewall middle part the overflow tank overflow vent 3-1 that diameter is 5mm, overflow tank overflow vent 3-1 is apart from sink top 10mm.
A kind of water-permeable cement concrete infiltration coefficient method of testing, adopt above-mentioned water-permeable cement concrete device for testing permeability coefficient, comprises the steps:
A, to get sectional area be A, is highly the water-permeable cement concrete sample of L, by becoming mould cylinder 9, Rubber membrane cover is contained on sample;
B, again by the amalgamation of three mould lobes in the sample outside, on suit, hoop 5, make three mould lobes be close to and clamp sample, form three lobe moulds 2, hoop 5 is connected on the hoop platform 7 at outer ring middle part of three lobe moulds 2, and the annulus platform 4 at three lobe mould 2 inwalls middle parts is held the sample bottom;
C, on three lobe mould 2 upper surfaces, put into rubber washer 6, rubber washer 6 can be entrapped on the step 2-3 of the fastening wing plate 2-2 of three lobe moulds inboard, again cylinder 1 lower end is placed on rubber washer 6, screw through the fastening wing plate 2-2 of three lobe moulds and the fastening wing plate 1-2 of cylinder, is made between cylinder 1 and three lobe moulds 2 and closely is connected;
D, the three lobe moulds 2 that will be connected with cylinder 1 are placed in overflow tank 3, open feed water valve valve 8, current are entered in cylinder 1, and infiltrate in overflow tank 3 by this sample, when overflow tank overflow vent 3-1 there are flowing out, adjust inflow, make the water level in cylinder 1 be no more than cylinder overflow vent 1-1;
E, when the output of t overflow tank overflow vent 3-1 discharge and feed water valve in second equates, the consumption socket joint is got the streamflow Q of overflow tank overflow vent 3-1t in second, and the difference H that measures the interior water level of cylinder 1 and the water level in overflow tank 3, H is accurate to 1mm, by the temperature T ℃ of water in thermometer measure overflow tank 3, T is accurate to 0.5 ℃;
F, repeat step e 3 times, get the mean value of Q, H, T,
Coefficient of permeability calculates as follows:
In formula
K
t---the infiltration coefficient of sample during water temperature T ℃, mm/s;
K
15---infiltration coefficient during 15 ℃ of standard temperatures, mm/s;
Q---the amount of seepage (be the mean value of Q in step f) of time t in second, mm
3;
The thickness of L---sample, mm;
H---mean water is poor, mm;
T---the time, s.
η
t/ η
15---water temperature is respectively the coefficient of dynamic viscosity ratio of T ℃ of water during with 15 ℃;
After e, mensuration have finished, unclamp the connection trip bolt, cylinder 1 and three lobe moulds 2 are separated, hoop 5 is taken off, take out sample, leave with after instrument is wiped clean.
The current that in steps d, feed water valve provides adopt air free water.
The distance of setting annulus platform 4 to three lobe mould 2 upper surfaces is L, the internal diameter of three lobe moulds 2 is D, in described step a, specimen finish is that D thickness is L, at first by rubber sleeve on the suction hole 9-1 that becomes mould cylinder 9, rubber diaphragm 10 is enclosed within on film forming cylinder inwall again, two ends rubber diaphragm 10 turns up, air-breathing by suction hole 9-1 with rubber pipette bulb, make rubber diaphragm 10 be close to into mould cylinder inwall, then from sample top suit film forming cylinder 9, make rubber diaphragm 10 be enclosed within on sample, then unclamp rubber pipette bulb, rubber diaphragm 10 is adsorbed on sample, takes off into mould cylinder 9.In the present embodiment, the diameter D of sample is 100mm, and L is 50mm.The diameter of the one-tenth mould cylinder 9 of cylindrical shape is that 110mm is highly 50mm, and suction hole 9-1 overall diameter is 0.6mm, 1 of the rubber hose that subsidiary 200mm is long, internal diameter is 0.6mm.The rubber diaphragm that thickness is 0.1mm is some, and the rubber diaphragm diameter is 95～100mm, height 70mm.
Encapsulant of the present utility model is rubber diaphragm 10, rubber washer 6, three lobe moulds 2, fixture hoop 5, by becoming mould cylinder 9, rubber diaphragm 10 is enclosed within on sample, then three lobe moulds 2 and hoop 5 is enclosed within on rubber diaphragm 10.Three lobe moulds 2 are placed in overflow tank 3, make top cylinder 1 that supporting member arranged, and the water in sample is communicated with the water of overflow tank 3 by the circular hole 2-1 of three lobe mould 2 bottoms, rubber washer 6 and fastening wing plate, trip bolt make cylinder 1 closely be connected with three lobe mould 2 sealings, avoid side to leak.Convenient experimental operation, measure accurately.Simplicity of design is reasonable, easily promotes.
The fastening wing plate 1-2 of the fastening wing plate 2-2 of three lobe mould of the present utility model and cylinder is convenient closely to be connected, then compresses rubber washer 6 and guarantees contact portion and install side closely water-tight; Three lobe moulds 2 can the firm support sample, the weight of the water yield in cylinder 1 and cylinder, sample is installed convenient, and dismounting is also convenient; Sample first seals by rubber pattern 10, then clamps by three lobe moulds 2, has further improved the sealing of the outer ring of sample, has guaranteed that the sample side is waterproof; Three lobes, the circular hole 2-1 design of 2 bottoms can be so that current flow in overflow tank 3, the discharge of easily and accurately testing overflow tank overflow vent 3-1.
Designed the proving installation of other structure before, but always exist side seal good not, sealing state is difficult for checking, tests and finishes rear dismounting inconvenience, and the weight of sample and top water supports the technical matterss such as stable not.
The above-mentioned foundation desirable embodiment of the present utility model of take is enlightenment, and by above-mentioned description, the relevant staff can, in the scope that does not depart from this utility model technological thought, carry out various change and modification fully.The technical scope of this utility model is not limited to the content on instructions, must determine its technical scope according to the claim scope.
Claims (6)
1. a water-permeable cement concrete device for testing permeability coefficient, it is characterized in that: comprise the consistent transparent cylinder of lower wall thickness (1), consistent three lobe moulds (2) and the overflow tank (3) at the internal diameter with cylinder (1) of cylinder (1) lower end is sealedly and fixedly connected, described cylinder (1) and three lobe moulds (2) all are arranged in overflow tank (3), described three lobe moulds (2) are cylindric and consist of the amalgamation of three mould lobes, three mould lobes are set with hoop (5) outward, three lobe mould (2) inner ring middle parts also are provided with annulus platform (4), be laid with circular hole (2-1) on the sustained height of described three lobe mould (2) bottoms, described overflow tank (3) top offers overflow tank overflow vent (3-1), the top of described cylinder (1) offers cylinder overflow vent (1-1), cylinder overflow vent (1-1) is connected to outside overflow tank (3) by pipeline, the height of described overflow tank overflow vent (3-1) is higher than the height of three lobe moulds (2), the height of cylinder overflow vent (1-1) is higher than the height of overflow tank overflow vent (3-1).
2. water-permeable cement concrete device for testing permeability coefficient as claimed in claim 1, it is characterized in that: the external diameter of described three lobe moulds (2) all is greater than the external diameter of cylinder (1), described cylinder (1) outer ring, lower end upwards is provided with the fastening wing plate of symmetrical cylinder (1-2) in same footpath, described three lobe mould (2) upper surfaces are greater than on the part of cylinder (1) outer ring, integrative-structure is provided with the fastening wing plate of three lobe moulds (2-2), the fastening wing plate 2-2 of described three lobe mould matches with the fastening wing plate of cylinder (1-2), form step (2-3) between the fastening wing plate of described three lobe mould (2-2) and three lobe mould (2) upper surfaces, the upper surface of described three lobe moulds (2) also is equipped with rubber washer (6), rubber washer (6) is positioned at the fastening wing plate of three lobe moulds (2-2) inboard.
3. water-permeable cement concrete device for testing permeability coefficient as claimed in claim 2, it is characterized in that: the length L of described step (2-3) is consistent with the wall thickness of cylinder (1).
4. water-permeable cement concrete device for testing permeability coefficient as claimed in claim 1, is characterized in that: described three lobe moulds (2) employing stainless steel or brass.
5. water-permeable cement concrete device for testing permeability coefficient as claimed in claim 1, is characterized in that: have the platform (7) for placing hoop (5) in the middle part of the outer ring of described three lobe moulds (2).
6. water-permeable cement concrete device for testing permeability coefficient as claimed in claim 1, is characterized in that: on described each mould lobe, be provided with 3 circular holes (2-1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320323653 CN203350158U (en) | 2013-06-04 | 2013-06-04 | Permeability coefficient testing device of pervious cement concrete |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320323653 CN203350158U (en) | 2013-06-04 | 2013-06-04 | Permeability coefficient testing device of pervious cement concrete |
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| CN 201320323653 Expired - Fee Related CN203350158U (en) | 2013-06-04 | 2013-06-04 | Permeability coefficient testing device of pervious cement concrete |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398929A (en) * | 2013-06-04 | 2013-11-20 | 常州大学 | Penetrated cement concrete penetration coefficient testing apparatus and method thereof |
| CN107917864A (en) * | 2016-10-08 | 2018-04-17 | 盐城工学院 | A kind of square pervious concrete test block device for testing permeability coefficient and its measuring method |
| CN108458958A (en) * | 2018-01-18 | 2018-08-28 | 中国建筑材料科学研究总院有限公司 | A kind of porous pavement coefficient of permeability test device and test method |
| CN109612909A (en) * | 2019-02-19 | 2019-04-12 | 山东科技大学 | Grout transformation Rock And Soil permeance property intelligent measure experimental rig and test method |
-
2013
- 2013-06-04 CN CN 201320323653 patent/CN203350158U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103398929A (en) * | 2013-06-04 | 2013-11-20 | 常州大学 | Penetrated cement concrete penetration coefficient testing apparatus and method thereof |
| CN103398929B (en) * | 2013-06-04 | 2015-11-18 | 常州大学 | The method of testing of water-permeable cement concrete infiltration coefficient |
| CN107917864A (en) * | 2016-10-08 | 2018-04-17 | 盐城工学院 | A kind of square pervious concrete test block device for testing permeability coefficient and its measuring method |
| CN108458958A (en) * | 2018-01-18 | 2018-08-28 | 中国建筑材料科学研究总院有限公司 | A kind of porous pavement coefficient of permeability test device and test method |
| CN108458958B (en) * | 2018-01-18 | 2020-12-01 | 中国建筑材料科学研究总院有限公司 | Permeable pavement water permeability coefficient testing device and method |
| CN109612909A (en) * | 2019-02-19 | 2019-04-12 | 山东科技大学 | Grout transformation Rock And Soil permeance property intelligent measure experimental rig and test method |
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Granted publication date: 20131218 Termination date: 20160604 |