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Coarse aggregate voidage testing device and method

A testing device and coarse aggregate technology, applied in measurement devices, analysis materials, permeability/surface area analysis, etc., can solve the problems of large error in the results of coarse aggregate porosity, large influence of human factors, etc., and achieve convenient operation. , the principle is simple, the effect of high value precision

Inactive Publication Date: 2016-06-22
QINGSHEN XINTONGLING BUILDING MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the calculation formula that the test of the void ratio of coarse aggregate needs to test the apparent density and bulk density of the aggregate separately, and two independent tests need to be carried out. The surface of the volume liter of aggregate should be treated. The specific regulations are that when testing the bulk density, coarse aggregate should be added to the volume liter until it exceeds the mouth of the volume liter cylinder. Aggregate particles fill up the concave part, so that the volumes of the slightly convex part and the concave part on the surface are roughly equal. In the actual operation of this part of the test, human factors are greatly affected, and there are differences in the bulk density results of different testers, resulting in the final calculated Coarse aggregate porosity results have large errors

Method used

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  • Coarse aggregate voidage testing device and method
  • Coarse aggregate voidage testing device and method
  • Coarse aggregate voidage testing device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] like figure 1 and figure 2 As shown, a coarse aggregate porosity test device includes a volume liter 1 and a water holding device 2, the volume liter 1 is a barrel structure, the side wall of the volume liter 1 is provided with openings, and the lower part of the outer wall of the volume liter 1 is also A water holding device 2 is provided, and the water holding device 2 is located below the opening, and a water gate 5 is provided on the outside of the opening, and a sealing strip 6 is also provided between the water gate 5 and the opening. The top is also provided with a protective cover 3, and the bottom of the protective cover 3 is provided with a protective cover support 4, and the protective cover 3 is fixed on the top edge of the volume liter 1 by the protective cover support 4.

[0036] The volume liter 1 is a cylindrical barrel structure.

[0037] The volume of the volume liter 1 is 10L, 20L or 30L.

[0038] The method using described a kind of coarse aggreg...

Embodiment 2

[0061] The device is the same as in Example 1.

[0062] The method using described a kind of coarse aggregate porosity testing device may further comprise the steps:

[0063] S1, volume liter calibration: use a balance to weigh the volume liter of 10L and the mass of the water holding device 2, denoted as M 1 , put the 10L volume liter on the level ground or workbench, inject water into the 10L volume liter, when it is about to be filled, slow down the injection speed, stop water injection when the water overflows slightly, let it stand for 10 seconds, open the water gate 5, Put water into the water storage device 2, wipe the outer surface of the 10L volume liter with a rag, move the 10L volume liter and the water storage device 2 to the platform scale, weigh the 10L volume liter, water and the total volume of the water storage device 2 Mass, denoted as M 2 ;

[0064] S2, porosity measurement: including the following sub-steps:

[0065] S21. Put the coarse aggregate to be ...

Embodiment 3

[0085] The device is the same as in Example 1.

[0086] The method using described a kind of coarse aggregate porosity testing device may further comprise the steps:

[0087] S1, volume liter calibration: use a balance to weigh the volume liter of 10L and the mass of the water holding device 2, denoted as M 1 , put the 10L volume liter on the level ground or workbench, inject water into the 10L volume liter, when it is about to be filled, slow down the injection speed, stop water injection when the water overflows slightly, let it stand for 12 seconds, open the water gate 5, Put water into the water storage device 2, wipe the outer surface of the 10L volume liter with a rag, move the 10L volume liter and the water storage device 2 to the platform scale, weigh the 10L volume liter, water and the total volume of the water storage device 2 Mass, denoted as M 2 ;

[0088] S2, porosity measurement: including the following sub-steps:

[0089] S21. Put the coarse aggregate to be ...

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Abstract

The invention relates to a coarse aggregate voidage testing device. The coarse aggregate voidage testing device comprises an aggregate container and a water storage device, the aggregate container is of drum structure, the sidewall of the aggregate container is provided with a hole, the water storage device is arranged on the lower portion of the outer wall of the aggregate container and below the hole. The outer side of the hole is provided with a water gate, a sealing strip is arranged between the water gate and the hole, and a protective cover is arranged on top of the aggregate container. The method using the device includes S1 calibrating the aggregate container; S2, measuring voidage, and S3 calculating voidage. The coarse aggregate voidage testing device has the advnatages that water flowing is not easy to react with or dissolve coarse aggregate, and functions as filler filling gaps among coarse aggregate during test. When the coarse aggregate is filled up, the volume of the water is the size of the gaps among the coarse aggregate, and the voidage of the coarse aggregate can be calculated by measuring water volume. The principle is simple, operation is convenient, and accuracy of voidage is high.

Description

technical field [0001] The invention relates to a coarse aggregate porosity testing device and method. Background technique [0002] The method of testing the void ratio of coarse aggregate in the existing national standard is obtained by calculating the apparent density and bulk density of the coarse aggregate according to the test. The calculation formula is: void ratio of coarse aggregate = 1-bulk density / apparent density , the packing density of coarse aggregate can be divided into loose packing density and tight packing density according to the actual situation, which correspond to the void ratio in their respective states. It can be seen from the calculation formula that the test of the void ratio of coarse aggregate needs to test the apparent density and bulk density of the aggregate separately, and two independent tests need to be carried out. The surface of the volume liter of aggregate should be treated. The specific regulations are that when testing the bulk dens...

Claims

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Application Information

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IPC IPC(8): G01N15/08
CPCG01N15/088
Inventor 谢守龙张超张大康吴建越曾君吕明超刘水华陈军
Owner QINGSHEN XINTONGLING BUILDING MATERIALS CO LTD
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