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Recycled aggregate concrete preparation method

A recycled aggregate and concrete technology, applied in the field of building materials and building 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, and eliminating additional costs. The effect of fees

Inactive Publication Date: 2012-10-03
伏开磊 +1
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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, etc., is not easy to decompose, and it takes a long time to decompose naturally. The volume is too large to be absorbed, not only occupying land resources, but also not conducive to environmental greening, and after a long time, it is buried underground, which is not conducive to vegetation growth and hinders 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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Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0053] The present invention will be described in detail below in conjunction with the accompanying drawings. As shown in the accompanying drawings:

[0054] A kind of preparation method of recycled aggregate concrete:

[0055] (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 carry out grade screening after crushing and drying with a moisture content of less than or equal to 0.5%. In the grade screening process, magnets are used to remove metals, and wood chips, plastics and sundries are removed in the manner of specific gravity, so that the particles are prepared into 0.3-0.6mm, 0.6-1.18mm, 1.18-2.36mm, 2.36-4.75mm For recycled aggregates, the recycled aggregates are stored separately according to different particle sizes for later use;

[0056] (2) Proportion of cement type P.C 32.5 series concrete:

[0057] (2). ①. The...

specific Embodiment approach 2

[0091] Carry out according to the specific implementation mode 1, only the specific proportioning ratio of each cement model series and each grade concrete of the recycled aggregate is as follows:

[0092]

[0093]

[0094] Also received the expected good results.

specific Embodiment approach 3

[0095] Carry out according to specific embodiment one, two, on the implementation basis of specific embodiment two, take the quantity two of specific embodiment as the basis, and reduce 1,2,5,8,10,15,20 respectively on this basis , 25, 30, 35, 40, 45, and 50 times were implemented; on this basis, they were expanded by 1, 2, 5, 8, 10, 15, 20, 25, 30, 35, 40, 45, and 50 times Implemented; thereby obtained multiple repeated tests of various scales of principle test, small-scale test, laboratory test, expansion test, medium-scale test, large-scale test, and production test, all of which have obtained expected good results, making this project The invention has a solid foundation from principle to implementation, creating good conditions for practical application and laying a solid foundation for widespread application.

[0096] After the production of the present invention, a trial assessment was carried out. During the trial assessment, experts in the industry agreed that: the de...

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Abstract

The invention discloses a recycled aggregate concrete preparation method and relates to the technical field of building raw materials. The method adopting the key technology of 'waste use' includes the steps: using building wastes such as waste concrete, waste bricks and waste lime-sand mortar which are smaller than 690mm in length as raw materials, determining the quantity of the raw materials as required, crushing and drying to enable moisture to be not more than 0.5% prior to gradational sieving, removing metal with magnets and removing wood dust, plastics and sundries according to the specific weight during gradational sieving so that recycled aggregates with the grain sizes of 0.3-0.6mm, 0.6-1.18mm, 1.18-2.36mm and 2.36-4.75mm are prepared, and then the recycled aggregates are mixed with broken stones, cement, pumping agents, retarders and water according to scientific proportion so that the recycled aggregate concrete of various grades in each recycled aggregate concrete model series is prepared. The recycled aggregate concrete is used as the building raw materials. The recycled aggregate concrete preparation method has the advantages that natural resources are protected, labor and time are saved, cost is low, wastes are turned to wealth, the requirements of low-carbon production and low-carbon life are met, and the method makes contributions to sustainable development.

Description

technical field [0001] The preparation method of recycled aggregate concrete of the present 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 of recycled aggregate concrete. Background technique [0002] As far as building materials and building material raw materials are concerned, everyone is no stranger to concrete, ready-mixed mortar, special mortar, aerated concrete blocks, and urban pavement bricks, especially when it comes to "concrete" 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 and mortar is increasing, and the mining of river sand is also increasing. After all, resources are limited, and river sand will become less and less. Invest a lot of manpower and materia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B18/16
CPCY02W30/91
Inventor 孙伟沦王畴峰
Owner 伏开磊
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