CN104990839B - A kind of sealing material permeability test device of mist containing sand - Google Patents

Abstract

The invention discloses a device for testing the permeability of a seal material containing sand mist, which comprises a main body bracket, a sample loader is fixed above the main body bracket, a measuring container is arranged inside the main body bracket, and the measuring container is located in the directly below the sampler; directly above the sample loader is provided with a feeding part that can move in the vertical direction. The invention has simple and reasonable structure, easy operation, high efficiency and stability, can accurately simulate the penetration effect of the sand-mist seal material in asphalt concrete, realize the quantitative evaluation of the permeability of the sand-mist seal material, and quickly measure the sand-mist seal material Permeability Test Apparatus for Sand Mist-Containing Seal Material Permeability in Asphalt Concrete.

Description

A device for testing the permeability of sand mist seal material

technical field

The invention belongs to the technical field of road engineering testing, and relates to a permeability testing device for a sealing layer material containing sand mist.

Background technique

As the sealing material of asphalt pavement, the sand-mist sealing material can penetrate into the surface pores and tiny cracks only when its permeability is good, and block the internal voids of the asphalt pavement surface, exerting a lasting anti-seepage effect At the same time, the fine-grained sand can quickly penetrate into the tiny cracks, play a filling role, and effectively prevent water from seeping down. The permeability coefficient is usually used to determine the permeability of the sand mist-containing seal layer material, and the permeability coefficient can also evaluate the effect of bridging and sealing micro cracks and voids on the pavement. Collecting on-site core samples and measuring the permeability coefficient of the designed sand-mist sealant material through the laboratory permeameter is the most commonly used method for testing the permeability of sand-mist sealant materials, but it requires core testing on the actual road surface, not only The workload is heavy, the test period is long, and the test results are highly discrete, which will also cause certain damage to the integrity of the grassroots.

Contents of the invention

In view of the defects or deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a simple and reasonable structure, easy operation, high efficiency and stability, which can accurately simulate the penetration effect of sand mist seal material in asphalt concrete, and realize the Quantitative evaluation of the permeability of sand-mist sealant materials, and a permeability test device for sand-mist sealant materials for rapid determination of the permeability of sand-mist sealant materials in asphalt concrete.

In order to achieve the above object, the present invention adopts the following technical solutions:

A device for testing the permeability of a sand mist-containing sealing layer material, comprising a main body support, a sample loader is fixed above the main body support, a measuring container is arranged inside the main body support, and the measuring container is located at the front of the sample loader. below;

A feeding part that can move vertically is arranged directly above the sample loader.

Specifically, the main body bracket includes two horizontally arranged upper rings and lower rings parallel to each other, and the two are connected by a plurality of vertically arranged struts;

The upper ring and the sample loader are fixedly connected by a plurality of connecting rods arranged horizontally.

Specifically, the sample loader includes a cylindrical sleeve, below which a funnel is fixedly connected; the lower end of the funnel protrudes into the measuring container.

Specifically, the feeding part includes two funnel-shaped containers arranged vertically and joined by narrow openings;

The height of one of the plurality of struts is greater than the height of the main body bracket, and is set as a first strut, and the feeding part is connected to the first strut through a horizontally arranged fixing rod, and The fixing rod can slide vertically relative to the first support rod.

Optionally, the fixing rod is connected to the first support rod through fastening bolts.

Optionally, the measuring container is a graduated cylinder.

Compared with the prior art, the present invention has the following technical effects:

1. Set the sample loader, the upper part is a cylindrical sleeve, and the lower part is a funnel, which is convenient for pouring the liquid infiltrated from the Marshall test piece that has not been demolded into the measuring container; Loss of sealant material containing sand mist.

2. There are feeding parts, which are two vertically arranged funnels with narrow openings connected to each other, so that after the sand mist sealing material is poured from the upper funnel, it is evenly spread on the surface of the Marshall test piece through the lower funnel .

3. The fixed rod can slide in the vertical direction relative to the first support rod, so that the vertical position of the feeding part relative to the Marshall test piece can be adjusted, thereby flexibly adapting to the test requirements.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the front view of the present invention;

Figure 3 is a sectional view of the funnel and the loader after loading the Marshall test piece that has not been demoulded;

The symbols in the figure represent: 1—main support, 2—measuring container, 3—sample loader, 4—feeding parts, 5—connecting rod, 6—fixing rod, 7—fastening bolt, 101—upper ring, 102— Lower ring, 103—support rod, 104—the first support rod, 301—cylindrical sleeve, 302—funnel.

The technical scheme of the present invention will be further explained and illustrated below in conjunction with the accompanying drawings and embodiments.

detailed description

According to the above-mentioned technical scheme, referring to Fig. 1, the permeability test device of the sand mist-containing seal material of the present invention includes a main body support 1, a sample loader 3 is fixed above the main body support 1, and a measuring device is arranged inside the main body support 1. The container 2, the measuring container 2 is located directly below the sample loader 3; directly above the sample loader 3 is provided a feeding part 4 that can move in the vertical direction.

The top of the main frame 1 supports the sample loader 3, the sample loader 3 is used to hold the Marshall test piece that has not been demoulded, and the measurement container 2 is used to receive the liquid infiltrated by the Marshall test piece, The feeding part 4 is used for spreading the sealing layer material containing sand mist on the surface of the Marshall test piece. The invention has simple and reasonable structure, easy operation, high efficiency and stability, can accurately simulate the penetration effect of the sand-mist seal material in asphalt concrete, realize the quantitative evaluation of the permeability of the sand-mist seal material, and quickly measure the sand-mist seal material Permeability Test Apparatus for Sand Mist-Containing Seal Material Permeability in Asphalt Concrete.

Specifically, the main body support 1 includes two upper rings 101 and lower rings 102 arranged horizontally and parallel to each other, connected by a plurality of vertically arranged poles 103 between the two; the upper ring 101 and the lower ring 102 The sample loaders 3 are fixedly connected by a plurality of connecting rods 5 arranged horizontally. The sample loader 3 is welded and fixed to the connecting rod 5 for maintaining the balance and stability of the sample loader 3 .

Specifically, the sample loader 3 includes a cylindrical sleeve 301, below which a funnel 302 is fixed; the lower end of the funnel 302 protrudes into the measuring container 2.

The undemoulded Marshall test piece is contained in the cylindrical sleeve 301 , and the funnel 302 is used to pour the liquid permeated from the undemoulded Marshall test piece into the measuring container 2 . The cylindrical sleeve 301 and the funnel 302 have an integrated structure, which can avoid the loss of the sealing layer material containing sand mist during the test.

The diameter d3 of the sample loading port of the sample loader ₃ is subject to ensuring that the Marshall test piece that has not been demolded can be put in; the height h1 of the circular paper sleeve 301 is lower _than the height h2 _of the Marshall test piece mold for convenience. Handling of specimens during testing.

Specifically, the feeding part 4 includes two funnel-shaped containers arranged vertically and joined by narrow openings, the two are coaxially arranged; the height of one of the plurality of struts 103 is greater than that of the The height of the main body support 1 is set as the first pole 104, and the charging part 4 is connected with the first pole 104 through a horizontally arranged fixed pole 6, and the fixed pole 6 can be connected with the first pole 104 relative to the first The strut 104 slides in the vertical direction.

The feeding part 4 is arranged as two vertically arranged funnel-shaped containers with narrow openings connected to each other, so that after the sand mist-containing sealing material is poured from the upper funnel-shaped container, it is spread more evenly through the lower funnel-shaped container On the surface of the Marshall test piece; the diameter d ₁ of the lower edge of the feed piece 4 is slightly lower than the diameter d ₂ of the sample, so as to ensure that the lower edge of the feed piece 4 can be placed in the mold of the Marshall test piece and fit with it, so that the sand mist seal The layer material can be completely spread on the surface of the Marshall test piece without running off.

The fixed rod 6 can slide vertically relative to the first support rod 104 , so that the vertical position of the feeding part 4 relative to the Marshall test piece can be adjusted, so as to flexibly adapt to test requirements.

Optionally, the fixing rod 6 and the first support rod 104 are connected by fastening bolts, which is convenient for adjusting the position of the fixing rod 6 .

Optionally, the measuring container 2 is a graduated cylinder.

Containing sand mist sealing layer material permeability test device of the present invention, its specific working process is as follows:

(1) Make the asphalt mixture into two groups of Marshall test pieces according to the specifications but do not demould, remove the paper gaskets on both sides of the test pieces, and then immerse them in 25°C water for 24 hours after curing at room temperature for 12 hours. Hour.

(2) Prepare two sets of devices of the present invention, put into the sample loaders of the two sets of devices together with two groups of test pieces of the test mold respectively, pay attention to avoid water loss, and place a measuring cylinder below the sample loader.

(3) By adjusting the fastening bolt 7, place the lower edge of the feeding part 4 in the mold of the Marshall test piece and fit it.

(4) Quickly pour 20ml of environment-friendly sand mist-containing sealing layer material into two groups of feeding parts, start timing, and after ten minutes, read the volumes of the liquids in the measuring cylinders in the two groups of tests respectively.

(5) Remove the film from the test piece, and measure the height of the test piece respectively.

Permeability is calculated as follows:

Among them: V—permeability, mm/s;

h—height of specimen, mm;

t—test time, here is 1min;

Q ₁ - the liquid volume received by the measuring cylinder in the first group of test devices;

Q ₂ - the liquid volume received by the measuring cylinder in the second group of test devices;

Q—the volume of the environment-friendly sand mist-containing sealing material poured into the test piece, here it is 20ml.

Claims (3)

1. a kind of sealing material permeability test device of mist containing sand, including main body rack (1), it is characterised in that the main body branch Fixed sample charging device (3) above frame (1), the main body rack (1) are internally provided with measurement container (2), described measurement container (2) position In the underface of the sample charging device (3)；

The sample charging device (3) is arranged above vertically movable charging part (4)；

The main body rack (1) includes two upper annulus (101) and lower annulus (102) horizontally disposed and be parallel to each other, the two Between connected by multiple poles (103) for being vertically arranged；

It is connected between the upper annulus (101) and sample charging device (3) by horizontally disposed multiple connecting rods (5)；

The sample charging device (3) includes a cylindrical sleeve (301), and be connected a funnel (302) below；Under the funnel (302) End is stretched into the measurement container (2)；

The charging part (4) is vertically arranged including two, and the funnel-shaped container that narrow mouth connects；

The height of one of pole (103) in the multiple pole (103) is more than the height of the main body rack (1), if For the first pole (104), the charging part (4) is connected by a horizontally disposed fix bar (6) and first pole (104) Connect, and the fix bar (6) can vertically be slided relative to first pole (104).

2. the sealing material permeability test device of mist containing sand as claimed in claim 1, it is characterised in that the fix bar (6) It is connected between first pole (104) by fastening bolt (7).

3. the sealing material permeability test device of mist containing sand as described in claim 1 to 2 is any, it is characterised in that the survey Amount container (2) uses graduated cylinder.