Method for resource recovery of construction wastes

A disposal method and technology of construction waste, applied in the direction of sustainable waste treatment, climate sustainability, solid waste management, etc., can solve the problem of low added value of resource utilization, and achieve the effect of increasing utilization value and increasing added value

Inactive Publication Date: 2011-10-12
上海德滨环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above-mentioned defects, the object of the present invention is to provide a construction waste resource disposal method to solve the problem that most of the recovered products in the traditional construction waste disposal process are recycled coarse aggregate and recycled fine aggregate, and the added value of its resource utilization is not high. question

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  • Method for resource recovery of construction wastes
  • Method for resource recovery of construction wastes

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Experimental program
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Embodiment 1

[0024] Embodiment 1, construction waste resource disposal:

[0025] Firstly, reclaimed sand with a particle size of 0-5mm is prepared: the materials are manually screened to remove impurities such as large steel bars, wood and plastics that are easy to pick out; the manually screened materials are sent to the jaw crusher for crushing; The crushed material is sent to the magnetic separator for magnetic separation to remove iron filings; the magnetically separated material is sent to the winnowing machine for winnowing to remove light impurities such as broken wood and plastic; the winnowed The material is screened, and the material with a particle size greater than 5mm is screened out to obtain reclaimed sand with a particle size of 0-5mm. Its flow chart is as figure 1 shown. The prepared reclaimed sand has a particle size of 0-5mm, is relatively clean, has less debris content, and basically meets the technical requirements of the grinding process.

[0026] Then, send the ob...

Embodiment 2

[0027] Embodiment 2, performance detection of regenerated powder

[0028] The regenerated powder in the present invention is a powder made by grinding the regenerated fine aggregate of construction waste as a main component of clay bricks and supplemented by concrete. Its inspection report is shown in the table below:

[0029]

[0030] In summary, compared with the prior art, the present invention has the following advantages and positive effects:

[0031] First of all, it improves the resource utilization value of construction waste. Experiments show that the regenerated construction waste powder produced by the method of the invention has high activity and can be used as an admixture for cement mixtures and various concrete products. The market value of recycled powder is one to two times higher than that of traditional recycled coarse aggregate and recycled fine aggregate, thus increasing the added value of resource utilization of construction waste.

[0032] Secondly...

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Abstract

The invention provides a method for resource recovery of construction wastes, which comprises the following steps of: separating and removing impurities from the construction waste materials and preparing aggregates from the materials through the disposal processes of manual separation, crushing, magnetic separation, air separation, screen separation and the like, wherein the particle sizes of the aggregate meet the requirement of milling equipment, and then preparing regenerated powder from the regenerated fine aggregates with various particle sizes through the disposal processes of drying, grinding, air separation and the like. According to the method, the resource utilization value of the construction wastes is improved, and simultaneously, a resource utilization channel of the construction wastes is opened up; and the produced regenerated powder of the construction wastes can partially substitute fly ash to serve as a cement-base construction raw material such as a building mortar, a walling material, a low-end concrete and the like.

Description

technical field [0001] The invention relates to the field of reutilization and resource disposal of solid waste, in particular to a method for resource disposal of construction waste. Background technique [0002] The natural environment, cultural environment, economic development level, and habits of each country are different, and the structure and building materials of the houses are often different. For example, the houses of ordinary people in Russia have more wooden structures, and the houses in the United States have more houses made of paper-faced gypsum boards. etc. Different construction materials lead to different construction waste disposal methods, resource utilization directions, and disposal technology and equipment. [0003] Most of the old buildings demolished in our country are old buildings built in the 1990s. Before the 1990s, clay bricks were the leading building materials for housing construction in my country (the production of clay bricks was gradua...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B18/16
CPCY02W30/91
Inventor 杨德志毛艳霞陆沈磊祝向阳
Owner 上海德滨环保科技有限公司
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