CN103398933A - Constant-pressure concrete permeability testing device - Google Patents

Constant-pressure concrete permeability testing device Download PDF

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Publication number
CN103398933A
CN103398933A CN2013103304663A CN201310330466A CN103398933A CN 103398933 A CN103398933 A CN 103398933A CN 2013103304663 A CN2013103304663 A CN 2013103304663A CN 201310330466 A CN201310330466 A CN 201310330466A CN 103398933 A CN103398933 A CN 103398933A
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CN
China
Prior art keywords
test specimen
test
specimen groove
groove
water
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CN2013103304663A
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Chinese (zh)
Inventor
钱吮智
张志刚
马辉
闫天浩
周杰
王慧
王康达
夏品苹
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东南大学
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Priority to CN2013103304663A priority Critical patent/CN103398933A/en
Publication of CN103398933A publication Critical patent/CN103398933A/en

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Abstract

The invention discloses a constant-pressure concrete permeability testing device which comprises a permeameter, wherein the permeameter comprises a pressure water tank and a test-piece groove; the upper end of the pressure water tank is closed and provided with a pressure regulating valve and an air inlet valve; meanwhile, the air inlet valve is used as a water inlet valve; the lower end of the pressure water tank is open and closely connected with an opening in the upper end of the test-piece groove; an inner cavity of the test-piece groove penetrates through in an up-and-down through mode, the inner wall of the test-piece groove is provided with a partition cushion, the circumferential side as well as the edges of the upper and lower end surface of a test-piece to be tested are both attached to the partition cushion, and the test-piece groove can press against the partition cushion and the test-piece to be tested; a water containing container is arranged below the test-piece groove; the water containing container is placed on a balance. According to the device, a previous method for pressurizing through still water is changed, and the pressurizing is implemented by using an air compressor, so that an added pressure is effectively controlled and directly observed, and the test cycle is shortened. Seeped water is received by the water containing container and the electronic balance, the quantity of the seeped water is recorded in real time by using a computer, and a permeability coefficient is calculated in combination with the Darcy law. The device is good in sealing property, simple in operation easy to oeprate and high in testing accuracy.

Description

The constant voltage concrete permeability testing device

Technical field

The present invention relates to a kind of concrete water permeability testing tool equipment, constant voltage concrete permeability testing device specifically, be applicable to measure the water permeability coefficient of cement-base composite material.

Background technology

Cement concrete is as a kind of artificial material, be in the world most widely used civil construction material, in general, in the engineerings such as dam body, riverbank, all use concrete as the protection works material, when considering its intensity and distortion, its perviousness is also to consider.Concrete perviousness and concrete permanance have close contacting, and usually think that perviousness is to estimate the important indicator of concrete durability.

At present, China's anti-penetration grade method that experiment is adopted to the cement-base composite material permeance property, with one group 6 circular test specimen stacks, from 0.1MPa, start to apply hydraulic pressure, every 8 hours hydraulic pressure, increase 0.1MPa, until while in 6 test specimens, 3 test specimens being arranged by penetration by water, stop test, the head height H of record this moment; By impervious hierarchy equation S=10H-1, the head height H in the time of will stopping testing is converted into integer, and this integer is concrete anti-penetration grade.Because cement-base composite material often has anti-permeability performance preferably, so this experimental technique cycle is long, and this test method water pressure temporal evolution, is difficult to by throughput ratio than infiltration coefficient.

Summary of the invention

The technical matters that solves: for the deficiencies in the prior art, constant voltage concrete permeability testing device provided by the invention, solve in prior art utilize cycle anti-penetration grade method test water cement-based composite material permeance property test duration long, can't be by the technical matters of throughput ratio than infiltration coefficient, and sealing is poor, the technical matters of complicated operation.

Technical scheme: for solving the problems of the technologies described above, the present invention by the following technical solutions:

The constant voltage concrete permeability testing device, comprise permeameter, and described permeameter comprises pressure water capacity cylinder and test specimen groove; Described pressure water capacity cylinder upper end closed and be provided with pressure regulator valve and gas admittance valve; Described gas admittance valve is simultaneously as water intaking valve; Described pressure water capacity cylinder lower ending opening and with airtight connection of inner chamber upper end open place of test specimen groove; Described test specimen groove inner chamber up/down perforation, the inwall of described test specimen groove is provided with dottle pin, and test specimen to be measured is arranged in dottle pin, and all fit with dottle pin in all sides of test specimen to be measured and edge, upper and lower end face, and the test specimen groove compresses dottle pin and test specimen to be measured; Described test specimen groove below arranges water container, and water container is placed on balance.

Further, in the present invention, described gas admittance valve is connected to sensator and air compressor in turn by wireway.Open air compressor, regulate pressure regulator valve, pressure is adjusted to suitable size, open gas admittance valve air pressure transmission is handed in plexiglass tent.Changed the method for in the past pressurizeing by hydrostatic, then adopted air compressor to pressurize, to institute's plus-pressure, can more effectively control and directly observation.

Further, in the present invention, on described pressure water capacity cylinder outer peripheral face, be fixed with the stainless steel outrigger, on stainless steel outrigger and test specimen groove, offer some corresponding bolts hole, described stainless steel outrigger closely is connected by bolt column with the test specimen groove.Pressure water capacity cylinder is pressed on the test specimen groove to good leak tightness.

Further, in the present invention, described balance is electronic balance, and is connected to computing machine by the RS232 serial ports.Can be by the quality of the water collected in computing machine real time record balance.

Further, in the present invention, described test specimen groove comprises test specimen groove and lower test specimen groove, up big and down small shoulder hole is set in the middle of upper test specimen groove, be designated as successively from top to bottom a hole and No. two holes, in the middle of lower test specimen groove, up-small and down-big shoulder hole is set, is designated as successively from top to bottom No. three holes and No. four holes, described No. two holes are coaxial and all with test specimen to be measured, mate with No. three holes.Make test specimen to be measured and test specimen groove close contact more, guarantee that current are not along test specimen to be measured edge seepage.

Further, in the present invention, the material of described pressure water capacity cylinder is organic glass.Organic glass is transparent and withstand voltage, can see through the content that it observes the water in pressure water capacity cylinder, during water shortage, can in time add water.

Further, in the present invention, the material of described test specimen groove is stainless steel.Because the test specimen flute length phase contacts with water, therefore select stainless steel material can prevent from getting rusty.

Further, in the present invention, described permeameter is fixed on support by gim peg is unsettled.

Further, in the present invention, on the lower surface of described test specimen groove, be fixed with funnel, described funnel is aimed at No. four holes.By the water that collection funnel oozes out, prevent outer spattering, guarantee the accuracy of test.

Beneficial effect:

Constant voltage concrete permeability testing device of the present invention, inject a certain amount of water by gas admittance valve in pressure water capacity cylinder; Open air compressor and sensator, by pressure regulator valve, be set to the pressure that needs, open gas admittance valve gas is pressed in pressure water capacity cylinder; By water container and electronic balance, accept the water that oozes out, and pass through the quality of computing machine real time record water seepage, and then in conjunction with Darcy's law, calculate the infiltration coefficient of test specimen.

The present invention has changed the method for in the past pressurizeing by hydrostatic, then adopts air compressor to pressurize, and to institute's plus-pressure, can more effectively control and directly observation, has shortened experimental period simultaneously, and test accuracy is high.

Test specimen groove and stainless steel outrigger are bolted, and compaction pressure water capacity cylinder guarantees the leakproofness that is connected between pressure water capacity cylinder and test specimen groove; Simultaneously in the test specimen groove and between test specimen to be measured, dottle pin is set, makes test specimen to be measured contact more closely with the test specimen groove, anti-sealing is from test specimen sidewall seepage.The good seal performance of whole device.

Utilize simultaneously electronic balance with computing machine, to be connected the Real-Time Monitoring mass change, improve conventional efficient.

Whole device is not an integral body, but is combined by a plurality of parts, and each part can be dismantled easily and assemble, and is convenient to like this packing into and taking out of test specimen.

The accompanying drawing explanation

Fig. 1 is the one-piece construction schematic diagram of apparatus of the present invention;

Fig. 2 is the structural representation of pressure water capacity cylinder in the present invention;

Fig. 3 is the structural representation that in the present invention, the test specimen groove coordinates with test specimen.

Embodiment

Below in conjunction with accompanying drawing, the present invention is further described.

The constant voltage concrete permeability testing device, comprise permeameter, and described permeameter is fixed on support 4 by gim peg 10 is unsettled.Described permeameter comprises pressure water capacity cylinder 5 and test specimen groove 8; The material of described pressure water capacity cylinder 5 is organic glass, and this material is transparent and withstand voltage, can see through the content that it observes the water in pressure water capacity cylinder 5, during water shortage, can in time add water.Described pressure water capacity cylinder 5 upper end closeds and be provided with pressure regulator valve 7 and gas admittance valve 6; Described gas admittance valve 6 is connected to sensator 2 and air compressor 1 in turn by wireway 3.Described gas admittance valve 6 is simultaneously as water intaking valve; Described pressure water capacity cylinder 5 lower ending openings and with airtight connection of inner chamber upper end open place of test specimen groove 8; On described pressure water capacity cylinder 5 outer peripheral faces, be fixed with stainless steel outrigger 13, on stainless steel outrigger 13 and test specimen groove 8, offer some corresponding bolts hole, described stainless steel outrigger 13 closely is connected by bolt column with test specimen groove 8, and pressure water capacity cylinder 5 is pressed on test specimen groove 8, guarantees airtight good.The material of described test specimen groove 8 is stainless steel, can prevent from water, contacting and getting rusty for a long time.Described test specimen groove 8 inner chamber up/down perforations, the inwall of described test specimen groove 8 is provided with dottle pin, and test specimen to be measured is arranged in dottle pin, and all fit with dottle pin in all sides of test specimen to be measured and edge, upper and lower end face, and the test specimen groove compresses dottle pin and test specimen to be measured; Concrete, described test specimen groove 8 comprises test specimen groove and lower test specimen groove, up big and down small shoulder hole is set in the middle of upper test specimen groove, be designated as successively from top to bottom a hole and No. two holes, in the middle of lower test specimen groove, up-small and down-big shoulder hole is set, is designated as successively from top to bottom No. three holes and No. four holes, described No. two holes are coaxial and all with test specimen to be measured, mate with No. three holes, a described hole and No. four bore dias are 80mm, and described No. two holes and No. three bore dias are 100mm.On the lower surface of described test specimen groove, be fixed with funnel 9, described funnel 9 is aimed at No. four holes.Described test specimen groove 8 belows arrange water container 12, and water container 12 is placed on balance 11.Described balance 11 is electronic balance, and is connected to computing machine by the RS232 serial ports.By funnel 9, collect the water that oozes out, prevent outer spattering, guarantee the accuracy of test, simultaneously by the quality of the water collected in computing machine real time record balance.

During test, according to following steps, carry out in turn:

Step 1: prefabricated cylindrical test specimen to be measured, diameter is 100mm, thickness is 20mm.

Step 2: open gim peg 10, permeameter is inverted, dismounting funnel 9 and test specimen groove.

Step 3: prefabricated test specimen cylindrical to be measured is put into to the test specimen groove, with parts such as bolt fixed funnels, guarantee to seal water-tight, then permeameter is just put.Then from gas admittance valve 6, import appropriate water to pressure water capacity cylinder 5.

Step 4: will connect with wireway between air compressor 1, sensator 2 and pressure water capacity cylinder 5; Open air compressor 1, regulate pressure regulator valve 7, pressure is adjusted to suitable size, open gas admittance valve 6 air pressure transmission is handed in pressure water capacity cylinder 5.

Step 5: electronic balance 11 and water container 12 are placed on to the water that the following access of funnel 9 is permeated, this electronic balance 11 is connected with the RS232 serial ports with computing machine, by the variation of the quality of water in water container 12 on the software Real Time Monitoring electronic balance on computing machine, finally by the data that gather, carry out the calculating of infiltration coefficient.The computing formula of infiltration coefficient is provided by Darcy's law, and Darcy's law shows, within a certain period of time, the water yield of permeable material time is directly proportional to the basal area of time and head difference (hydraulic pressure), with the thickness of test specimen, is inversely proportional to, that is:

K = Qd Ath

In formula, K---infiltration coefficient (m/s)

The water yield (the m of Q---permeable material test specimen 3)

T---permeability time (s)

A---water permeable area (m 2)

H---hydrostatic force head (m)

D---specimen thickness (m)

Annotate: the hydrostatic force head in formula is calculated and can be obtained by the barometer reading on pressure regulator valve 7.

The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.

Claims (9)

1. constant voltage concrete permeability testing device, it is characterized in that: comprise permeameter, described permeameter comprises pressure water capacity cylinder (5) and test specimen groove (8); Described pressure water capacity cylinder (5) upper end closed and be provided with pressure regulator valve (7) and gas admittance valve (6); Described gas admittance valve (6) is simultaneously as water intaking valve; Described pressure water capacity cylinder (5) lower ending opening and with airtight connection of inner chamber upper end open place of test specimen groove (8); Described test specimen groove (8) inner chamber up/down perforation, the inwall of described test specimen groove (8) is provided with dottle pin, and test specimen to be measured is arranged in dottle pin, and all fit with dottle pin in all sides of test specimen to be measured and edge, upper and lower end face, and the test specimen groove compresses dottle pin and test specimen to be measured; Described test specimen groove (8) below arranges water container (12), and water container (12) is placed on balance (11).
2. constant voltage concrete permeability testing device according to claim 1, it is characterized in that: described gas admittance valve (6) is connected to sensator (2) and air compressor (1) in turn by wireway (3).
3. constant voltage concrete permeability testing device according to claim 1, it is characterized in that: on described pressure water capacity cylinder (5) outer peripheral face, be fixed with stainless steel outrigger (13), on stainless steel outrigger (13) and test specimen groove (8), offer some corresponding bolts hole, described stainless steel outrigger (13) closely is connected by bolt column with test specimen groove (8).
4. constant voltage concrete permeability testing device according to claim 1, it is characterized in that: described balance (11) is electronic balance, and is connected to computing machine by the RS232 serial ports.
5. constant voltage concrete permeability testing device according to claim 1, it is characterized in that: described test specimen groove (8) comprises test specimen groove and lower test specimen groove, up big and down small shoulder hole is set in the middle of upper test specimen groove, be designated as successively from top to bottom a hole and No. two holes, up-small and down-big shoulder hole is set in the middle of lower test specimen groove, be designated as successively from top to bottom No. three holes and No. four holes, described No. two holes with No. three holes coaxial and all with test specimen coupling to be measured.
6. constant voltage concrete permeability testing device according to claim 1, it is characterized in that: the material of described pressure water capacity cylinder (5) is organic glass.
7. constant voltage concrete permeability testing device according to claim 1, it is characterized in that: the material of described test specimen groove (8) is stainless steel.
8. constant voltage concrete permeability testing device according to claim 1, it is characterized in that: described permeameter is fixed on support (4) by gim peg (10) is unsettled.
9. constant voltage concrete permeability testing device according to claim 4, it is characterized in that: on the lower surface of described test specimen groove, be fixed with funnel (9), described funnel (9) is aimed at No. four holes.
CN2013103304663A 2013-07-31 2013-07-31 Constant-pressure concrete permeability testing device CN103398933A (en)

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Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103760084A (en) * 2014-01-16 2014-04-30 常州工学院 Anti-seepage slurry infiltration instrument of refuse landfill
CN104122185A (en) * 2014-07-22 2014-10-29 浙江理工大学 Tester for researching compression-permeation relationship of garbage soil
CN104568693A (en) * 2014-12-09 2015-04-29 北京林业大学 Indoor soil infiltration rate measuring device and method
CN104596910A (en) * 2015-02-03 2015-05-06 重庆大学 In-situ nondestructive concrete permeability testing device and testing method thereof
CN105547968A (en) * 2016-03-11 2016-05-04 东南大学 Diffusion type concrete surface layer anti-permeability test instrument and testing method thereof
CN105588796A (en) * 2015-12-17 2016-05-18 扬州大学 Device for accurately and rapidly determining permeability coefficient of soil
CN105738266A (en) * 2016-02-17 2016-07-06 中国水利水电科学研究院 Test device for anti-permeability performance of hydraulic concrete layer and method thereof
CN105910976A (en) * 2016-06-27 2016-08-31 西安交通大学 Test device and method for evaluating micro-crack self-curing effect of bituminous mixture
CN106908366A (en) * 2017-03-02 2017-06-30 常州工学院 A kind of vapour-pressure type household refuse landfill sites are percolated instrument and its application method
CN107328700A (en) * 2017-07-06 2017-11-07 南通纺织丝绸产业技术研究院 A kind of multifunctional artificial Vascular permeability performance test device
CN108982327A (en) * 2018-08-10 2018-12-11 西安理工大学 A kind of damage concrete permeability detection device
CN109470619A (en) * 2018-12-07 2019-03-15 湖南大学 A kind of the saturation permeability coefficient test macro and method of analog Rock And Soil drying and watering cycle effect
CN109540729A (en) * 2018-12-04 2019-03-29 三峡大学 Evaluate the device and method that long-term seepage acts on lower sand degree of injury
CN109856026A (en) * 2018-11-15 2019-06-07 华中科技大学 A kind of device and method for testing seepy material coefficient of permeability

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JP4840812B2 (en) * 2006-08-21 2011-12-21 国立大学法人 香川大学 Permeability tester and method
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Cited By (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103760084A (en) * 2014-01-16 2014-04-30 常州工学院 Anti-seepage slurry infiltration instrument of refuse landfill
CN104122185A (en) * 2014-07-22 2014-10-29 浙江理工大学 Tester for researching compression-permeation relationship of garbage soil
CN104122185B (en) * 2014-07-22 2016-10-05 浙江理工大学 The compression of a kind of refuse soil and infiltration relation analyzer
CN104568693B (en) * 2014-12-09 2017-12-15 北京林业大学 A kind of indoor soil infiltration rate measurement apparatus and method
CN104568693A (en) * 2014-12-09 2015-04-29 北京林业大学 Indoor soil infiltration rate measuring device and method
CN104596910A (en) * 2015-02-03 2015-05-06 重庆大学 In-situ nondestructive concrete permeability testing device and testing method thereof
CN105588796A (en) * 2015-12-17 2016-05-18 扬州大学 Device for accurately and rapidly determining permeability coefficient of soil
CN105588796B (en) * 2015-12-17 2018-01-23 扬州大学 A kind of device of accurate quick measure soil permeability coefficient
CN105738266A (en) * 2016-02-17 2016-07-06 中国水利水电科学研究院 Test device for anti-permeability performance of hydraulic concrete layer and method thereof
CN105547968B (en) * 2016-03-11 2018-05-08 东南大学 A kind of diffused concrete surface layer anti-permeability performance test equipment and its test method
CN105547968A (en) * 2016-03-11 2016-05-04 东南大学 Diffusion type concrete surface layer anti-permeability test instrument and testing method thereof
CN105910976B (en) * 2016-06-27 2017-06-06 西安交通大学 A kind of experimental rig and method for testing asphalt microcrack self-healing effect
CN105910976A (en) * 2016-06-27 2016-08-31 西安交通大学 Test device and method for evaluating micro-crack self-curing effect of bituminous mixture
CN106908366B (en) * 2017-03-02 2020-01-31 常州工学院 air pressure type domestic garbage landfill percolation apparatus and use method thereof
CN106908366A (en) * 2017-03-02 2017-06-30 常州工学院 A kind of vapour-pressure type household refuse landfill sites are percolated instrument and its application method
CN107328700A (en) * 2017-07-06 2017-11-07 南通纺织丝绸产业技术研究院 A kind of multifunctional artificial Vascular permeability performance test device
CN108982327A (en) * 2018-08-10 2018-12-11 西安理工大学 A kind of damage concrete permeability detection device
CN109856026A (en) * 2018-11-15 2019-06-07 华中科技大学 A kind of device and method for testing seepy material coefficient of permeability
CN109856026B (en) * 2018-11-15 2020-06-02 华中科技大学 Device and method for testing water permeability coefficient of water permeable material
CN109540729A (en) * 2018-12-04 2019-03-29 三峡大学 Evaluate the device and method that long-term seepage acts on lower sand degree of injury
CN109470619A (en) * 2018-12-07 2019-03-15 湖南大学 A kind of the saturation permeability coefficient test macro and method of analog Rock And Soil drying and watering cycle effect

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Application publication date: 20131120