CN205844148U - A kind of test device of concrete permeable performance - Google Patents

Abstract

This utility model relates to the test device of a kind of concrete permeable performance, including base and a timer, base is vertically arranged with support bar, and support bar is fixedly installed burette fixture and specimen holder the most successively；Support bar surrounding is provided with at least two grip assemblies, and every grip assembly includes photogate, burette and transparent adapter sleeve；Burette is vertically held on burette fixture, sample to be tested is held on specimen holder, transparent adapter sleeve is arranged between burette and sample to be tested, transparent adapter sleeve is up-small and down-big infundibulate, transparent adapter sleeve upper end is set in burette bottom, and transparent adapter sleeve lower end is set in sample to be tested top；The bottom of burette is provided with control taps；The light-emitting component of photogate and reception element are arranged on transparent adapter sleeve both sides, and the reception element of photogate electrically connects with timer.

Description

A device for testing the water permeability of concrete

technical field

The utility model relates to a test device for the water permeability of concrete, which belongs to the field of building construction.

Background technique

When comparing the water permeability of multiple concretes in the laboratory, the water permeability coefficient measuring device is generally used to complete. The concrete sample is installed in the water permeability coefficient measuring device, and the water permeability coefficient measuring device is used to obtain various data of the test. The currently used hydraulic permeability measuring device includes a measuring cylinder, a clamping support mechanism for the test piece and a water reservoir; the cross-sectional area of the measuring and measuring cylinder with a scale is equal to the cross-sectional area of the concrete specimen to be tested.

The shortcomings of this method are: 1. The side leakage problem of the test piece has not been well solved, the water seepage coefficient of the test piece cannot be accurately measured, and the actual operation is cumbersome; 2. The pressure difference between the piezometric tubes In the case of very small (water head difference less than 1mm), the measurement error of ordinary differential pressure gauge is relatively large; 3. During the penetration test, there is no effective way to discharge the air bubbles in the test piece, which will affect the test results 4. When judging the water permeability of two or more pervious concretes, the test time is long.

Utility model content

In order to solve the above technical problems, the utility model provides a test device for concrete water permeability, which can solve the problem of side leakage, and can judge two or more concretes intuitively with high efficiency, speed, and small error. Water permeability is good or bad.

The technical scheme of the utility model is as follows:

A test device for concrete water permeability, comprising a base and a timer, a support rod is vertically arranged on the base, a burette clamp and a sample clamp are fixedly arranged on the support rod from top to bottom in sequence; at least two clamps are arranged around the support rod Set of components, each set of components includes a photoelectric gate, a burette and a transparent connection sleeve; the burette is vertically clamped on the burette holder, the sample to be tested is clamped on the sample holder, and the transparent connection sleeve is arranged between the burette and the sample to be tested Between them, the transparent connecting sleeve is funnel-shaped with a small top and a large bottom. The upper end of the transparent connecting sleeve is set on the lower part of the burette, and the lower end of the transparent connecting sleeve is set on the upper part of the sample to be tested; the lower part of the burette is equipped with a water control switch; The light-emitting element and the receiving element are arranged on both sides of the transparent connection sleeve, and the receiving element of the photoelectric gate is electrically connected with the timer.

Wherein, there are two sets of components, and the two sets of components are symmetrically arranged on both sides of the support rod; the water control switch at the bottom of the burette is a cock, and the cock includes a plug body arranged in the burette and a stopper handle arranged outside the burette, A through hole is arranged on the plug body; a cross bar is arranged between the two cocks, and the two ends of the cross bar are respectively fixedly connected with the handle ends of the two cocks; the cross bar rotates axially to control the simultaneous opening and closing of the lower ends of the two burettes.

Wherein, a water receiving container is arranged under the sample to be tested.

The utility model has the following beneficial effects:

1. The transparent connecting sleeve of the present invention can solve the problem of side leakage, and the overall device can be efficient, fast, with small error, and intuitively judge the water permeability of two or more concretes.

2. The utility model has the advantages of simple structure, convenient processing and low investment cost; the cock adjusts the water discharge time and water flow speed to ensure the unity of the tests at both ends; by observing the time of water penetration at both ends of the test, the water permeability of the two kinds of concrete can be judged intuitively Performance; the photoelectric gate and timer are used to record the water penetration time, which is convenient and accurate, and personnel do not need to monitor the whole process during the test; the water permeability coefficient can be calculated through the measured data, so that the water permeability of multiple concrete samples can be judged from the calculated data. good or bad.

Description of drawings

Fig. 1 is the front view of the utility model;

Fig. 2 is a side view of the utility model;

Fig. 3 is the top view of the photoelectric gate of the present utility model;

Fig. 4 is a structural schematic diagram of the cock of the present invention.

The reference signs in the figure represent:

1-base, 2-support rod, 3-burette clamp, 4-sample clamp, 5-component, 51-photoelectric gate, 510-light emitting element, 511-receiving element, 52-burette, 53-transparent connection sleeve, 54 -sample to be tested, 55-cock, 551-plug body, 552-plug handle, 553-through hole, 56-crossbar, 6-timer, 7-water container.

detailed description

The utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Fig. 1, Fig. 2 and Fig. 3, a test device for the water permeability of concrete includes a base 1 and a timer 6, and a support rod 2 is vertically arranged on the base 1, and the support rod 2 is fixedly arranged sequentially from top to bottom There are burette clamps 3 and sample clamps 4; there are at least two sets of components 5 around the support rod 2, and each set of components 5 includes a photoelectric gate 51, a burette 52 and a transparent connecting sleeve 53; the burette 52 is vertically clamped on the burette clamp 3 , the sample 54 to be tested is clamped on the sample holder 4, and the transparent connecting sleeve 53 is arranged between the burette 52 and the sample 54 to be tested. Set on the lower part of the burette 52, the lower end of the transparent connecting sleeve 53 is sleeved on the upper part of the sample 54 to be tested; the lower part of the burette 52 is provided with a water control switch; On both sides, the receiving element 511 of the photogate 51 is electrically connected to the timer 6 . All the samples 54 to be tested are regular quadrangular prisms with the same specifications, and the diameter of the transparent connecting sleeve 53 is slightly larger than the diameter of the upper part of the samples 54 to be tested.

Referring to Fig. 4, there are two sets of components 5, and the two sets of components 5 are arranged symmetrically on both sides of the support rod 2; 551 and the plug handle 552 arranged outside the burette 52, the plug body 551 is provided with a through hole 553; a cross bar 56 is arranged between the two cocks 55, and the two ends of the cross bar 56 are respectively fixed to the plug handle 552 ends of the two cocks 55 Connect; Crossbar 56 axially rotates to control the opening and closing of the lower ends of the two burettes 52 simultaneously. When the through hole 553 is horizontal, the water does not come in. After the cock 55 is rotated, when the through hole 553 is made vertical, the water will flow out automatically.

Referring to FIG. 1 and FIG. 2 , a water receiving container 7 is arranged below the sample to be tested 54 .

Working principle of the utility model:

1. The sample 54 to be tested is a regular square prism. Before the test starts, measure the height h and side length b of the top surface of the sample 54 to be tested with a steel ruler, and calculate the effective section A of water permeability, where A=b ² .

Two, the caliber of the transparent connecting sleeve 53 is slightly larger than the sample 54 to be tested. Before the test, the edge of the sample 54 to be tested should be coated with sealant and connected with the transparent connecting sleeve 53 to avoid water leakage. Before starting, inject blackened water into the glass tube of the burette 52 to ensure that the water injection volume Q in the glass tubes of the two burettes 52 is the same and reach the recommended water injection volume. Measure and record the water head height H in the glass tube of the burette 52 at this time with a steel ruler When the test starts, the cocks 55 of the two burettes 52 are opened simultaneously by rotating the cross bar 56 to ensure that the water flow on both sides is in the same state.

3. After the cock 55 is opened, the photoelectric gate 51 senses the black water drop falling onto the transparent connecting sleeve 53, and starts timing automatically. Connected to the timer 6, the timer 6 automatically records two time points, and the water penetration time of at least two groups of concrete samples can be obtained through the timer 6, thereby obtaining the water penetration time difference Δt.

Four, by Darcy's theorem, calculate water permeability coefficient T; H is the head height in the glass tube of burette 52, Q is water capacity, h is the height of sample 54 to be tested, A is the effective area of sample to be tested, and Δt is the time difference of water penetration : .

The above is only an embodiment of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process conversion made by using the utility model specification and accompanying drawings, or directly or indirectly used in other Related technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (3)

1. the test device of a concrete permeable performance, it is characterised in that: include base (1) and a timer (6), base (1) it is vertically arranged with support bar (2) on, support bar (2) is fixedly installed burette fixture (3) and sample the most successively Fixture (4)；Support bar (2) surrounding is provided with at least two grip assemblies (5), and every grip assembly (5) includes photogate (51), burette And transparent adapter sleeve (53) (52)；Burette (52) is vertically held on burette fixture (3), and sample to be tested (54) is held on On specimen holder (4), transparent adapter sleeve (53) is arranged between burette (52) and sample to be tested (54), transparent adapter sleeve (53) For up-small and down-big infundibulate, transparent adapter sleeve (53) upper end is set in burette (52) bottom, transparent adapter sleeve (53) lower end It is set in sample to be tested (54) top；The bottom of burette (52) is provided with control taps；The light-emitting component of photogate (51) (510) and receive element (511) be arranged on transparent adapter sleeve (53) both sides, the reception element (511) of photogate (51) and timing Device (6) electrically connects.

The test device of concrete permeable performance the most according to claim 1, it is characterised in that: the number of described assembly (5) Amount is two sets, and two grip assemblies (5) are symmetricly set in support bar (2) both sides；The control taps of the bottom of burette (52) is cock (55), cock (55) includes the cock body (551) being arranged in burette (52) and is arranged on burette (52) plug handle outward (552), cock body (551) is provided with through hole (553)；A cross bar (56), the two of cross bar (56) it are provided with between two cocks (55) Plug handle (552) end of end respectively with two cocks (55) is fixing to be connected；Cross bar (56) axial rotation controls under two burettes (52) End opens and closes simultaneously.

The test device of concrete permeable performance the most according to claim 1, it is characterised in that: described sample to be tested (54) Lower section be provided with water receiving container (7).