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Preparation method of recycled aggregate aerated concrete block

A technology of aerated concrete and recycled aggregate, which is applied in the field of building materials and building materials raw materials, can solve the problems of wasting natural resources, consuming large coal resources, and increasing additional costs, saving labor, time, labor, and additional costs, protecting natural resources, The effect of eliminating additional costs

Inactive Publication Date: 2012-10-03
SHENZHEN WEILUN BUILDING MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

River sand (that is, sand salvaged from rivers, rivers, and lakes by boats, its price is very high), and river sand must be dried before use. Since the water content of river sand is 98%, it will contain about 70% water after natural drying. -80% or so, the water content of the sand used for production must be less than 0.5%, so it costs a lot of money to dry the river sand, which not only consumes a lot of coal resources, but also the freight is extremely high, and the price soars
At the same time, on the other hand, the amount of demolition of old buildings in cities is increasing. Of course, there are more and more wastes after demolition, and more and more land has been occupied by centralized stacking.
The piles of garbage from existing demolished buildings are increasing day by day, and there is very little treatment. Moreover, solid waste, such as concrete, masonry, waste sand and ash, etc., is not easy to decompose, and it takes a long time to decompose naturally. Even if it is used to fill pits, lay , will also be too large to be absorbed, not only occupying land resources, but also not conducive to environmental greening, and after a long time, buried in the ground, not conducive to vegetation growth and hindering the filtering effect of soil on groundwater resources, etc.
To sum up, the deficiencies, defects and disadvantages of existing known technologies and the present situation are: on the one hand, waste of natural resources, time-consuming and labor-intensive work and increased additional costs, prices continue to soar and high costs; on the other hand, waste accumulation gradually The increase cannot be absorbed, occupies land resources, and has an impact on the environment; none of them meet the requirements of low-carbon production and low-carbon life

Method used

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  • Preparation method of recycled aggregate aerated concrete block
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specific Embodiment approach 1

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings. As shown in the accompanying drawings:

[0022] A preparation method of recycled aggregate aerated concrete block:

[0023] ①. Preparation of recycled aggregate: Use waste concrete, waste bricks, and waste sand and ash construction waste less than 690mm in size as raw materials, determine the quantity according to needs, and then sieve after crushing and drying with a moisture content of less than or equal to 0.5%. In the process, magnets are used to remove metal, and wood chips, plastics and sundries are removed in a manner of specific gravity, so as to prepare recycled aggregates with a particle size of 0.3-2.36mm and store them for later use;

[0024] ②. Preparation of recycled aggregate concrete block: 692 kg of recycled aggregate, 138 kg of cement, 138 kg of lime, 30 kg of anhydrite, 0.4 kg of aluminum powder, 0.5 kg of cellulose, and 220 kg of water were mixed a...

specific Embodiment approach 2

[0026] Carry out according to specific embodiment 1, just based on the implementation quantity of specific embodiment 1, reduce 1, 2, 5, 8, 10, 15, 20, 25, 30, 35, 40, 45, 50 times and carry out implementation, and on this basis, respectively enlarged 1, 2, 5, 8, 10, 15, 20, 25, 30, 35, 40, 45, and 50 times for implementation; thus obtained principle test, small-scale test, experimental Laboratory test, expanded test, medium-scale test, large-scale test, productive test of various scales of repeated tests, all obtained good results expected, so that the present invention has a solid foundation from principle to implementation, creating a new era for practical application Good conditions have laid a solid foundation for widespread promotion and application.

[0027] After the production of the present invention, a trial assessment was carried out. During the trial assessment, experts in the industry agreed that: the development of recycled aggregates was successful, and the con...

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Abstract

The invention discloses a preparation method of a recycled aggregate aerated concrete block, relating to the technical field of building raw materials.. The method adopts the key technology of'waste utilization', takes the building waste including waste concrete smaller than 690mm, waste bricks and waste lime-sand mortar as raw materials, and comprises the following steps of: fixing the quantity of the raw materials according to the needs; grinding the raw materials and drying until the moisture content is less than or equal to 0.5%; screening to remove metal, wood dust, plastics and impurities to obtain recycled aggregate with the particle size of 0.3-2.36mm; adding cement, lime, anhydrite, aluminum powder, cellulose and water, and mixing; and performing pouring, molding, cutting and steaming to obtain a finished product of the recycled aggregate aerated concrete block which is used as a building raw material. The method disclosed by the invention protects natural resources, saves labor, time and effort, turns waste into wealth, conforms to the requirements of low-carbon production and low-carbon life, and makes contribution to the sustainable development.

Description

technical field [0001] The method for preparing recycled aggregate aerated concrete blocks of the invention relates to the technical field of building materials; in particular, it relates to the technical field of building material raw materials; in particular, it relates to the technical field of preparation methods for recycled aggregate aerated concrete blocks. Background technique [0002] As far as building materials and building material raw materials are concerned, everyone is no stranger to concrete blocks, ready-mixed mortar, special mortar, concrete, and urban pavement bricks, especially when it comes to "concrete blocks" used in construction. "In terms of materials, cement and river sand are mostly used as basic raw materials. With the rapid development of urban construction, the demand for concrete blocks is increasing day by day. Not only cement is made of natural resources, but also the mining of river sand is increasing. After all, resources are limited, and r...

Claims

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Application Information

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IPC IPC(8): C04B38/02C04B28/14C04B18/16
CPCY02W30/91
Inventor 孙伟沦王畴峰
Owner SHENZHEN WEILUN BUILDING MATERIALS
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