Method for treating and regenerating reuse building waste

A technology of construction waste and regenerated fine powder, which is applied in the field of construction waste treatment and recycling, can solve the problems of building durability and safety hazards, river safety, and hidden dangers of flood control and disaster resistance, and achieves the effect of expanding sources.

Active Publication Date: 2008-01-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditionally, river sand is mainly used as fine aggregate in our country, but at present, river sand resources in our country are very tight, many rivers have restricted sand mining, and a large number of illegal sand mining activities have also caused great safety hazards to river safety and flood control and disaster relief; In coastal areas, there is also a large amount of untreated sea sand used in buildings, which has caused great harm to the durability and safety of buildings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] The regenerated fine aggregate prepared from waste concrete is mixed into Portland cement with a particle size of 0-5 mm. The water absorption rate of the crushed regenerated fine aggregate is 6.5%, and the mass ratio of it to cement is 5:1. Mixed with water, it can form masonry mortar, and its grade can reach M7.5.

Embodiment 2

[0050] After mixing high-quality regenerated fine aggregates prepared from waste concrete, waste stone and waste ceramics with a particle size of 0.15-0.8mm in a ratio of 60:30:10, the water absorption rate of the regenerated fine aggregates is 4.5%. Sand, 42.5R grade Portland cement, fly ash, cellulose ether and rubber powder, the mass ratio of which to quartz sand, cement, fly ash, cellulose ether and rubber powder is 32:20:40:5: 0.5:2.5, can form tile adhesive (a special dry-mixed mortar), and its performance can meet the requirements of C1 type tile adhesive.

Embodiment 3

[0052] After mixing the regenerated fine aggregate prepared from waste concrete and waste concrete small hollow blocks in a ratio of 60:40, the water absorption rate of the regenerated fine aggregate is 6.5%, and mixed with gravel, Portland cement, and fly ash, The mass ratio of it to gravel, Portland cement and fly ash is 700:1100:300:100, and it is mixed with water and high-efficiency water reducing agent (controlling the water-binder ratio to 0.35) to form new concrete. The strength level can reach C45.

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Abstract

The present invention discloses building waste treating and reusing process, which includes the following steps: classifying building wastes into waste concrete, waste stone material, waste ceramic, waste sintered brick and waste lime-sand brick; crushing separately into coarse grains and eliminating metal, timber and other impurity; milling into 5 mm below regenerated fine aggregate; sorting 0.15 mm below high quality fine aggregate and milling into regenerated fine powder material of 250-600 sq m/kg specific surface area; and preparing mortar, concrete, asphalt concrete and other building material with the regenerated fine aggregate and the regenerated fine powder.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to classifying construction waste, and preparing regenerated fine aggregate from waste concrete, waste concrete wall materials, waste stone, waste ceramics, waste sintered bricks and tiles and waste sand bricks , high-quality recycled fine aggregate and recycled fine powder, and further use it to manufacture mortar, concrete, asphalt mixture, inorganic binder stabilized material, wall material, cement, mineral admixture and other building materials. Background technique [0002] With the acceleration of the urbanization process in our country, the large-scale reconstruction of old cities and the construction of new buildings have resulted in an increasing amount of construction waste; with the improvement of people's living standards, frequent renovations have also resulted in a large amount of construction waste. Construction waste is the main component of urban waste,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09B5/00B09B3/00
CPCC04B18/16Y02W30/91C04B20/0016C04B20/0092C04B20/026
Inventor 杨医博梁松莫海鸿陈尤雯
Owner SOUTH CHINA UNIV OF TECH
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