Recycled concrete brick and preparation method thereof

A technology of recycled concrete and recycled aggregate, which is applied in the direction of manufacturing tools, sustainable waste treatment, solid waste management, etc., can solve the problems of high energy consumption of recycled aggregate treatment, low product mechanical properties, high product cost, etc., and achieve product cost The effect of reducing, high water absorption and sufficient source

Active Publication Date: 2013-03-13
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are still some problems to be solved in this method, that is, how to further reduce the energy consumption of construction waste crushing and how to promote the use of recycled concrete brick

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] For recycled concrete bricks, when the replacement rate of recycled aggregate is 35-45%, the raw materials per cubic meter are prepared according to the following parts by weight: 375 parts of cement, 730 parts of sand, 689 parts of crushed stone, and 466 parts of recycled aggregate , 130 parts of water, 2.0 parts of solvent-based water reducer;

[0029] A method for preparing recycled concrete bricks, comprising the steps of:

[0030] (1) Preparation and pretreatment of recycled aggregate:

[0031] a. After the initial treatment of crushing, sorting, cutting, and hammering, the construction waste in villages and towns is crushed by a coarse crusher, passed through a 40mm square hole sieve for primary screening, connected to a secondary crusher for crushing, and passed through a 20mm square hole Secondary sieving, tertiary sieving through a 5mm square hole sieve, and crushing of sieve residues, collection of fragments with a particle size of 5-20mm and enhanced process...

Embodiment 2

[0039] For recycled concrete bricks, when the replacement rate of recycled aggregate is 35-45%, the raw materials per cubic meter are prepared according to the following parts by weight: 385 parts of cement, 710 parts of sand, 669 parts of crushed stone, and 446 parts of recycled aggregate , 120 parts of water, 1.8 parts of polycarboxylate solvent-based water reducer; others are the same as in Example 1, and will not be repeated.

Embodiment 3

[0041] For recycled concrete bricks, when the replacement rate of recycled aggregate is 35-45%, the raw materials per cubic meter are prepared according to the following parts by weight: 365 parts of cement, 750 parts of sand, 709 parts of crushed stone, and 486 parts of recycled aggregate , 140 parts of water, 2.2 parts of naphthalene-based solvent-based water-reducers; others are the same as in Example 1, and will not be repeated.

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Abstract

The invention discloses a recycled concrete brick and a preparation method thereof. Every cubic meter of the recycled concrete bricks is prepared from the following raw materials in parts by weight: 365-385 parts of cement, 710-750 parts of sand, 669-709 parts of gravel, 446-486 parts of recycled aggregate, 120-140 parts of water and 1.8-2.2 parts of solvent-type water reducing agent when the substitution rate of the recycled aggregate is 35-45%; or 375-395 parts of cement, 720-760 parts of sand, 436-476 parts of gravel, 679-719 parts of recycled aggregate, 125-145 parts of water and 1.7-2.0 parts of solvent-type water reducing agent when the substitution rate of the recycled aggregate is 55-65%. The method for preparing the recycled concrete brick comprises the following steps: preparing the recycled aggregate, premixing the raw materials, mixing at high speed, carrying out vibration demolding, and curing. The invention has the advantages of high compression strength, high folding strength, favorable use functions, flexible assembly mode, high construction waste utilization ratio, high substitution rate of recycled aggregate, and low production cost, and thus, has favorable popularization prospects.

Description

technical field [0001] The invention relates to a building wall material and a preparation method thereof, in particular to a recycled concrete brick made from construction waste clay bricks as the main raw material and a preparation method thereof, which belongs to the technology of recycling construction waste and also belongs to a It is a building wall material with excellent performance, mainly used for masonry structure load-bearing, frame structure partition wall, etc. in buildings, and is a substitute for traditional fired clay bricks. Background technique [0002] At present, brick wall materials generally used in construction can be divided into fired clay bricks, fired porous bricks, fired hollow bricks, concrete porous bricks, autoclaved fly ash bricks and autoclaved lime sand bricks, but from the perspective of application , traditional fired clay bricks still occupy a huge market share. The main raw material of fired clay bricks is silty or sandy clay, which is...

Claims

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Application Information

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IPC IPC(8): C04B28/00C04B18/16B28B1/08
CPCY02W30/91
Inventor 刘军徐长伟张冰李瑶刘润清张云
Owner SHENYANG LIGONG UNIV
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