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A preparation process of recycled aggregate concrete and the prepared concrete

A technology of recycled aggregate and preparation process, which is applied in the field of building material production, can solve the problems of increased porosity, concrete cracking, and damaged concrete crack resistance, and achieves the goal of reducing porosity, improving bonding strength, and reducing cracking phenomenon. effect of chance

Active Publication Date: 2021-10-15
四川仁寿晟兴商砼有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, this technical solution crushes concrete waste and brick waste separately. Since the concrete waste contains a certain amount of hardened cement mortar, the concrete waste is prone to microcracks in the hardened cement mortar during the crushing process, resulting in porosity. Improvement, resulting in concrete prone to cracking, resulting in damage to the crack resistance of concrete

Method used

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  • A preparation process of recycled aggregate concrete and the prepared concrete
  • A preparation process of recycled aggregate concrete and the prepared concrete
  • A preparation process of recycled aggregate concrete and the prepared concrete

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Embodiment 1: a kind of preparation technology of recycled aggregate concrete comprises the following steps:

[0044] S1 aggregate crushing, aggregate crushing includes the following steps: S1A building slag refinement: take 1100Kg concrete building slag, crush it with a pulverizer, and sieve it with a sieve with an aperture of 2mm and 15mm, and continue to crush the powder with larger particles Until the particles are not larger than 15mm, select particles with a particle diameter of 2mm-15mm to make slag particles; S1B acid treatment: get concentrated hydrochloric acid and water with a hydrogen chloride mass concentration of 36.5% to prepare a hydrogen chloride mass concentration of 2% (the rest are water) hydrochloric acid solution, add 4400Kg hydrochloric acid solution with a hydrogen chloride mass concentration of 2% (the rest is water) to the slag particles, stir evenly, soak for 7 hours, filter, wash with water until the pH is 6, and dry at 70°C for 150min to prep...

Embodiment 2

[0049] The difference between Example 2 and Example 1 is that the slag granules in Example 2 do not undergo an acid treatment process. In Example 2, the slag particles are dried at 70°C for 150 minutes to obtain slag powder, and the others are kept the same as in Example 1. unanimous.

Embodiment 3

[0051] The difference between Example 3 and Example 1 is that in Example 3, the zeolite powder is sieved with sieves with apertures of 500 μm and 900 μm respectively, and the zeolite powder with larger particles is pulverized with a pulverizer until the particles are not larger than 900 μm. The zeolite powder is 500 μm-900 μm, and the others are consistent with Example 1.

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Abstract

The invention discloses a preparation process of recycled aggregate concrete and the prepared concrete, and relates to the technical field of concrete preparation; a preparation process of recycled aggregate concrete comprises the following steps: S1 aggregate crushing: taking concrete building slag, Pulverize to obtain building slag powder; S2 aggregate pretreatment: take building slag powder, add silica sol, mix evenly, static aging, and dry to obtain recycled aggregate dry powder; S3 mixing: weigh a certain amount of pulverized coal Ash, coarse aggregate, fine aggregate and zeolite powder are mixed evenly to prepare concrete powder; S4 concrete preparation: add a certain amount of water to the dry powder of recycled aggregate, stir, add cement and water reducer, add concrete powder The raw material is continuously stirred to produce recycled aggregate concrete products; the preparation process of recycled aggregate concrete has the advantage of being convenient to improve the crack resistance of the product; the recycled aggregate concrete has the advantage of good crack resistance.

Description

technical field [0001] The invention relates to the technical field of building material production, in particular to a preparation process of recycled aggregate concrete and the prepared concrete. Background technique [0002] Concrete is a high-strength building material produced from sand, gravel, cement and other materials. Because of its high strength, good plasticity and durability, it is widely used in road construction, high-rise buildings and other fields. With the rapid development of the economy and society, some old buildings need to be demolished and rebuilt, resulting in a large amount of construction waste, which brings certain challenges to environmental protection. The research on the recycling of construction waste for the preparation of recycled aggregate concrete is increasing. many. [0003] The patent with the authorized notification number CN106431106B discloses a recycled concrete produced by using recycled aggregate, which is composed of the followi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B28/00C04B20/10C04B20/02
CPCC04B20/026C04B20/1066C04B28/00C04B2201/50C04B18/16C04B18/08C04B14/02C04B14/068C04B14/047C04B2103/302
Inventor 魏岱李长红杨宏伟曹宇杨陶
Owner 四川仁寿晟兴商砼有限公司
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