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A method and system for testing water absorption of recycled coarse aggregate

A technology of recycled coarse aggregate and testing method, which is applied in the field of measurement of recycled coarse aggregate, and can solve the problems of large limitations, uncertain time of water absorption, high water absorption, etc.

Active Publication Date: 2021-09-10
北京新桥技术发展有限公司 +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] After the regenerated coarse aggregate is taken out of the water, it takes at least 5 minutes to wipe the regenerated coarse aggregate to the surface-dry state with water-absorbing materials. The degree of wiping is different; and the recycled coarse aggregate is still absorbing water continuously during the wiping process, so the specific time for the calculated water absorption rate at this time will not be determined, and the shorter the soaking time of the recycled coarse aggregate in water , the more limited the method of using the above method to test the water absorption rate is, the water absorption rate may even be higher when soaked for 5 minutes than when soaked for 10 minutes

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  • A method and system for testing water absorption of recycled coarse aggregate
  • A method and system for testing water absorption of recycled coarse aggregate
  • A method and system for testing water absorption of recycled coarse aggregate

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[0041]In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the accompanying drawings only show some but not all of the parts related to the present invention.

[0042] like Figure 1 to Figure 3 As shown, this embodiment provides a system for testing the water absorption rate of recycled coarse aggregate, including a mesh basket 1, a balance 2, a water tank 3, a controller and an intelligent terminal, wherein the mesh basket 1 is used to hold the regenerated coarse aggregate; The upper end of the...

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Abstract

The invention relates to the technical field of measurement of regenerated coarse aggregate, and discloses a method and system for testing the water absorption rate of regenerated coarse aggregate. The method includes the following steps: measuring the mass m of the dried regenerated coarse aggregate 1 ; Place the basket filled with regenerated coarse aggregate in water at a preset temperature to allow the regenerated coarse aggregate to stand in water for 1440min, and collect the water quality M of the regenerated coarse aggregate when the water absorption time is T and 1440min respectively T and M 1 Take out the regenerated coarse aggregate and wipe it to the saturated surface dry state, measure the mass m of the regenerated coarse aggregate in the saturated surface dry state 2 ; Calculate the water absorption rate W of the regenerated coarse aggregate when the water absorption time is T T =(M T +m 2 -m 1 -M 1 ) / m 1 ×100%. By setting T, the water absorption rate at any time from 0 min to 1440 min can be obtained, and the early water absorption rate of recycled coarse aggregate is tested, especially the water absorption rate in the first 10 minutes, which is convenient for predicting the impact of recycled coarse aggregate on the slump of cement concrete .

Description

technical field [0001] The invention relates to the technical field of regenerated coarse aggregate measurement, in particular to a method and system for measuring the water absorption rate of regenerated coarse aggregate. Background technique [0002] The traditional test method for the water absorption rate of primary coarse aggregate is to soak the primary coarse aggregate in water for 24 hours, take out the primary coarse aggregate, wipe it with a water-absorbing material until it is saturated and dry, weigh it, and calculate the water absorption rate after drying. However, due to the large mortar content, fast water absorption rate and large water absorption in the recycled coarse aggregate, it is close to saturation within 5min-10min of putting the recycled coarse aggregate into water. When the water absorption test method of primary coarse aggregate is used to test the water absorption rate of recycled coarse aggregate, the water absorption rate test is not accurate, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N5/02
CPCG01N5/025
Inventor 于蕾刘兆磊吕思忠郭建民吴斌王晓明王凯刘星亮
Owner 北京新桥技术发展有限公司
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