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Measurement method of water absorption of regenerative coarse aggregates

A technology of regenerated coarse aggregate and measurement method, which is applied in the field of measurement of water absorption of regenerated coarse aggregate, and can solve problems such as influence

Inactive Publication Date: 2015-08-19
湖南省交通科学研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The invention provides a method for measuring the water absorption of regenerated coarse aggregate to solve the problem of the influence of the loss of crystal water inside the cement mortar of regenerated coarse aggregate on the water absorption of regenerated coarse aggregate.

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  • Measurement method of water absorption of regenerative coarse aggregates
  • Measurement method of water absorption of regenerative coarse aggregates
  • Measurement method of water absorption of regenerative coarse aggregates

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Embodiment Construction

[0019] The following examples can enable those skilled in the art to understand the present invention more fully, but do not limit the present invention in any way.

[0020] Instruments and materials:

[0021] (1) Oven: The temperature can be controlled at 105°C±5°C.

[0022] (2) Balance: Weigh 5kg, and the sensing capacity is not more than 5g.

[0023] (3) Standard sieve: the aperture is 4.75mm.

[0024] (4) Others: containers, trays and towels, etc.

[0025] Test preparation:

[0026] Sieve the incoming samples, use a 4.75mm sieve for the recycled aggregate, and sieve out the particles below the sieve hole. Then prepare the sample according to the method of T0301 of "Test Regulations for Aggregate in Highway Engineering" (JTG E42-2005), and divide it into two parts for later use.

[0027] experiment procedure:

[0028] refer to figure 1 , in step S1, take 1 part of the sample and put it in a shallow pan and spread it flat to ensure that the aggregates do not accumulat...

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Abstract

The invention provides a measurement method of water absorption of regenerative coarse aggregates. The measurement method includes the following steps: S1 taking a sample and placing it in a tray, drying the sample and the tray in a drying oven for more than 24h, and weighing the total mass of the dried sample and the tray as m0; S2 placing the dried sample in a container with water, taking the sample out after 24h, wiping away water on the surface of the sample to make a saturated surface dried sample, and weighing the total weight of the saturated surface dried sample and the tray where the saturated surface dried sample is located as m2; S3 drying the saturated surface dried sample and the tray in the drying oven again for more than 24h, taking out the redried sample and tray and cooling them in a container with a cover for more than 1h, and weighing the total mass of the cooled sample and tray as m1; wherein the water absorption wx is calculated with the formula in the patent claim, and m4 is the mass of the tray. The measurement method of the water absorption of the regenerative coarse aggregates can reduce the influence of crystal water loss in cement mortar of the regenerative coarse aggregates on tests as much as possible.

Description

technical field [0001] The present invention relates to a quantitative method, and more particularly, to a method for measuring the water absorption of recycled coarse aggregate. Background technique [0002] Recycled coarse aggregate comes from the coarse aggregate obtained from the old cement concrete pavement surface, semi-rigid (sub) base and building concrete after processing and crushing. [0003] my country's "Highway Engineering Aggregate Test Regulations" (JTG E42-2005) T0307 test method is a water absorption measurement method formulated for ordinary aggregates. For recycled coarse aggregates, if T0307 is used for the test, the water absorption rate obtained is too high. If the density and water absorption rate of recycled coarse aggregate is used to design the construction mix ratio of cement concrete or cement stabilized materials, it will have a significant impact on the construction quality. [0004] Compared with ordinary coarse aggregate, the surface of recyc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/02
Inventor 陈宇亮谌博吴超凡钟梦武朱沅峰张继森吴开姚胜
Owner 湖南省交通科学研究院有限公司
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