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High-quality treatment method for recycled coarse cement concrete aggregate

A recycled coarse aggregate, high-quality treatment technology, applied in the direction of sustainable waste treatment, solid waste management, climate sustainability, etc., can solve the problems of low bulk density affecting aggregate gradation design and other issues

Inactive Publication Date: 2014-04-02
INNER MONGOLIA UNIVERSITY
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Problems solved by technology

In addition, the low bulk density affects the gradation design of the aggregate

Method used

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  • High-quality treatment method for recycled coarse cement concrete aggregate
  • High-quality treatment method for recycled coarse cement concrete aggregate

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Embodiment Construction

[0010] The specific method steps are as follows:

[0011] (1) Recycled coarse aggregate treatment: 500kg of old cement concrete blocks with a mass of 500kg are crushed and sieved to obtain the required 330kg of recycled coarse aggregate (particle size: 10mm~30mm) and 12kg of recycled fine powder (particle size<0.15 mm) as raw material for standby; the mass of recycled micropowder replaces 30% mixed powder of P·II42.5 Portland cement (total mass: 20kg) slurry aqueous solution, and the water-cement ratio is 1:1; the selected recycled coarse aggregate is soaked In the mixed slurry aqueous solution, the volume ratio of the regenerated coarse aggregate to the mixed slurry aqueous solution is 1:2, soak until the initial setting time of the slurry water (16h), and then use a dry cloth to absorb the surface moisture of the regenerated coarse aggregate and put it into the 105°C ± 5°C oven for 24 hours, take it out of the oven and put it in a constant temperature water tank (20°C ± 1) f...

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Abstract

The invention discloses a high-quality treatment method for recycled coarse cement concrete aggregate. The method comprises the steps of adding mixed powder of recycled micropowder, which is 0-50% the mass of P.II42.5 silicate cement, to the P.II42.5 silicate cement, adding water and stirring so as to obtain slurry (the water cement ratio is 1: 1), soaking recycled coarse aggregate in the slurry, baking, and carrying out a standard curing process, thereby obtaining high-quality recycled coarse aggregate. Thus, the quality of the recycled coarse aggregate is improved, and the recycled micropowder is reused. The method has practical significance in the reduction of environmental pollution caused by construction wastes and the recycling of resources.

Description

technical field [0001] The invention relates to concrete materials for construction, in particular to a high-quality treatment method for recycled coarse aggregate of cement concrete. Background technique [0002] The amount of waste concrete demolished every year in the world, the waste concrete produced by new buildings, and the waste concrete discharged from concrete factories and prefabricated component factories is huge. However, there are still not many ways to deal with these waste concrete in the world. The traditional treatment methods are mainly transported to the outskirts for open-air storage or landfill. Such a huge amount of waste concrete not only requires a lot of storage space, but also requires a lot of storage space, which causes serious environmental pollution problems. Due to the imperfect supervision mechanism of construction waste in the past, the contradictions and problems existing in the construction waste removal industry have become increasingly ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/16
CPCY02W30/91
Inventor 满都拉胡晓宇
Owner INNER MONGOLIA UNIVERSITY
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