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Recycled brick aggregate concrete and preparation method thereof

A technology for reclaiming bricks and concrete, applied in the field of building materials, can solve the problems of insufficient performance of thermal insulation of brick-aggregate concrete, and achieve the effects of excellent thermal insulation performance, high strength, and reduced water-to-binder ratio.

Inactive Publication Date: 2018-02-02
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, recycled brick aggregate concrete is generally only used as a partial replacement of sand and gravel, so that the thermal insulation and light weight characteristics of brick aggregate concrete cannot be fully utilized.

Method used

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  • Recycled brick aggregate concrete and preparation method thereof
  • Recycled brick aggregate concrete and preparation method thereof
  • Recycled brick aggregate concrete and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031] A recycled brick aggregate concrete. The ratio of recycled brick aggregate concrete by mass includes:

[0032]

[0033] The preparation process of the recycled brick aggregate concrete is as follows:

[0034] Pre-wet the coarse aggregate of recycled bricks and the fine aggregate of recycled bricks respectively for 24h in advance, and then put them in a mixer and mix them for 30s at a rate of 30r / min. Then mix the cement and silica fume in advance and add them to the forced mixer. Continue mixing for 30s, and finally add water and polycarboxylic acid high-performance water reducing agent into the mixer at the same time and mix for 3 minutes to obtain recycled brick aggregate concrete.

example 2

[0036] A recycled brick aggregate concrete. The ratio of recycled brick aggregate concrete by mass includes:

[0037]

[0038] The preparation process of the recycled brick aggregate concrete is as follows:

[0039] Pre-wet the coarse aggregate of recycled bricks and the fine aggregate of recycled bricks for 20 hours in advance, and then put them in a mixer, and mix them for 20 seconds at a rate of 40r / min. Then, mix the cement and silica fume in advance and add them to the mixer to continue. Mix for 20s, and finally add water and polycarboxylic acid-based high-performance water reducing agent into the mixer at the same time and mix for 2 minutes to obtain recycled brick aggregate concrete.

example 3

[0041] A recycled brick aggregate concrete. The ratio of recycled brick aggregate concrete by mass includes:

[0042]

[0043]

[0044] The preparation process of the recycled brick aggregate concrete is as follows:

[0045] Pre-wet the coarse aggregate of recycled bricks and the fine aggregate of recycled bricks for 30 hours in advance, and then put them in a mixer and mix them for 60 seconds at a rate of 20r / min. Then, mix the cement and silica fume in advance and add them to the mixer to continue. Mix for 60 seconds, and finally add water and polycarboxylate high-performance water reducing agent into the mixer at the same time and mix for 5 minutes to obtain recycled brick aggregate concrete.

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Abstract

The present invention discloses recycled brick aggregate concrete and a preparation method thereof. The concrete comprises the following components by mass: 64 to 90 portions of a recycled brick coarse aggregate, 48 to 80 portions of a recycled brick fine aggregate, 36 to 42 portions of cement, 1.8 to 2.2 parts of silica fume, 11 to 17 parts of water and 0.2 to 1.0 part of a high-performance waterreducer. The preparation method is as follows: 1) the recycled brick coarse aggregate and the recycled brick fine aggregate are weighed according to proportion, and evenly mixed to obtain a recycledbrick aggregate; 2) the cement and the silica fume are proportionally evenly mixed, and added into the recycled brick aggregate to obtain a mixture through even stirring and mixing; and 3) the water and the high performance water reducer are proportionally weighed and added to the mixture to obtain the recycled brick aggregate concrete through even stirring and mixing. The recycled brick aggregateconcrete has good workability and good cohesiveness, and compared with ordinary concrete, the recycled brick aggregate concrete has better thermal insulation effect, and the seismic performance and fire resistance are improved.

Description

Technical field [0001] The invention relates to a recycled brick aggregate concrete and a preparation method thereof, and belongs to the field of building materials. Background technique [0002] Recycled brick-aggregate concrete refers to a building material prepared by adding cementitious materials, admixtures, and water, using broken red bricks from construction waste as aggregates. Compared with traditional concrete, this material has the characteristics of thermal insulation, light weight, etc., and can help solve the problem of increasing shortage of sand and gravel resources and damage to the surrounding environment during the mining process, which is in line with my country's sustainable development policy. At present, the recycled brick-aggregate concrete is generally only used as a partial replacement of sand and gravel, so that the thermal insulation and light weight characteristics of brick-aggregate concrete have not been fully utilized. [0003] Using waste clay bric...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04
CPCC04B28/04C04B2201/20C04B2201/32C04B2201/50C04B18/167C04B18/146C04B24/24
Inventor 高建明赵亚松倪凯翔
Owner SOUTHEAST UNIV
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