Regenerated sand powder green concrete, and preparation method thereof

A technology of reclaimed sand and concrete, which is applied in ceramic products, other household utensils, applications, etc., can solve the problems of complex calcination process, difficult city implementation, and increased urban environmental load, so as to achieve good corrosion resistance and promote construction waste. Effect of weight reduction and saving of sand and gravel

Active Publication Date: 2018-07-13
SHANGHAI GUOTONG ENVIRONMENTAL PROTECTION EQUIP
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  • Abstract
  • Description
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Problems solved by technology

The three invention patents all belong to the technology of calcining waste concrete to make recycled cement. Due to the complicated calcination process and the increase of urban environmental load, it is difficult to implement it in cities

Method used

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  • Regenerated sand powder green concrete, and preparation method thereof
  • Regenerated sand powder green concrete, and preparation method thereof
  • Regenerated sand powder green concrete, and preparation method thereof

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Embodiment 1～8

[0056] A preparation method for recycled sand powder green concrete, comprising the steps of:

[0057] Step (1), the preparation of regenerated sand powder:

[0058] Usually, the demolition site of the house is pretreated with a mobile crusher, and the construction waste after coarse crushing is transported to the factory for recycling.

[0059] The coarsely crushed construction waste enters the factory, and the slag with a large soil content less than 5mm is stripped out through a bar sieve, and then the following are used:

[0060] Step (1) Preparation process of recycled sand powder:

[0061] 1. Lamination: The recycled coarse aggregate of construction waste with a particle size of 5-50mm is pulverized by the lamination equipment of the high-pressure roller press;

[0062] 2. Impurity removal: use sorting equipment such as a drum screen to separate sand and gravel or light impurities with a particle size greater than 5mm, and recover recycled sand powder with a particle s...

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Abstract

The invention provides a regenerated sand powder green concrete. The regenerated sand powder green concrete comprises, by mass, 10 to 93% of regenerated sand powder, 5 to 83% of a regenerated composite admixture, 0 to 20% of Portland cement, 0 to 5% of an alkali-activator, and 1 to 2% of an additive; a coarse aggregate free lightweight concrete with a density smaller than 1900kg/m<3> is prepared from regenerated sand powder and regenerated composite admixture at a double component doping amount of 70% or larger. The invention also discloses a preparation method of the regenerated sand powder green concrete. According to the preparation method, waste concrete cement stone flour and brick-concrete regenerated sand powder are subjected to mixing grinding so as to obtain the regenerated composite admixture which is a multi-component composite gelling material and possesses composite gelling and superimposed effect. The regenerated sand powder green concrete possesses the filling effect andmicro-aggregate effect of regenerated sand powder, and the gelling performance of the regenerated composite admixture, the double component doping amount is higher than 70%, so that regenerated material large amount doping is realized, and it is beneficial for promotion of building waste resource utilization and green development of concrete industry.

Description

technical field [0001] The invention belongs to the technical field of regeneration and utilization of construction waste residues, and in particular relates to recycled sand powder green concrete and a preparation method thereof. Background technique [0002] Concrete is the man-made material with the largest output in the world. The total output of concrete in the world is 6-7 billion cubic meters per year, and the total concrete production in my country is 3-4 billion cubic meters per year. The recyclable development and sustainable development of concrete has attracted widespread attention. Concrete is basically divided into two categories in terms of performance, one is structural load-bearing concrete, and the other is non-structural load-bearing concrete, that is, functional concrete, such as filled concrete, lightweight concrete, lightweight aggregate concrete, foamed concrete, and aerated concrete. Concrete, powdered concrete, etc. [0003] In the traditional and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B38/00C04B111/40
CPCC04B28/04C04B2111/00017C04B2111/00663C04B2111/00706C04B2111/00724C04B2111/00732C04B2111/0075C04B2111/40C04B2201/20C04B2201/50C04B18/16C04B22/00C04B22/062C04B20/0076C04B2103/302C04B2103/0068C04B38/00
Inventor 杨德志刘琼王栋民崔素萍刘泽孙继成
Owner SHANGHAI GUOTONG ENVIRONMENTAL PROTECTION EQUIP
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