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Environment-friendly recycled concrete

A recycled concrete and environmentally friendly technology, applied in the field of concrete, can solve the problems of shortage of natural sand and gravel resources, pollution of waste concrete, etc., and achieve the effect of simple processing technology, delaying consolidation time, and maintaining slump

Inactive Publication Date: 2017-10-31
张晓莉
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide an environmentally friendly recycled concrete with superior performance and low processing cost, so as to solve the problems of waste concrete pollution and shortage of natural sand and gravel resources

Method used

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Embodiment Construction

[0021] The following describes specific embodiments of the present invention, as well as comparative examples and detection results; in order to show the technical solutions and beneficial effects of the present invention in detail.

[0022] In the embodiment, the cement adopts 325 conventional cement, the sand adopts natural fine sand, and the recycled coarse aggregate made by crushing waste concrete has a particle size of 20-40 mm, a carbon fiber grade of T700, a length of 10-20 mm, and a retarder grade of ZLC-A1.

[0023] The pretreatment of the carbon fiber is to weigh 1.6% of the total weight of the carbon fiber and dissolve the silane coupling agent in an appropriate amount of water; soak the carbon fiber in an aqueous solution and then take it out to dry; or spray the aqueous solution evenly on the surface of the carbon fiber and then dry it.

[0024] Then, according to the C30 ratio, 10 sets of concrete samples were prepared by adding micro-silica powder, carbon fiber, retarde...

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Abstract

The invention relates to concrete, aims at providing environment-friendly recycled concrete which is excellent in performance and low in cost and aims at solving the problems of waste concrete pollution and natural sand resource shortage. Each cubic meter of environment-friendly recycled concrete comprises 400-520kg of cement, 630-780kg of sand, 1000-1100kg of recycled coarse aggregate, 1-7kg of carbon fiber, 35-42kg of silica fume, 1.2-2.0kg of a retarder and 3.5-5kg of slaked lime, wherein the carbon fiber is pretreated through a silane coupling agent and the length of the carbon fiber is 5-25mm. According to the invention, full combination of the recycled coarse aggregate and a gel material and a reinforcing material is ensured, so that the compression resistance and the tensile ability of the concrete are significantly improved, and the problems of waste concrete pollution and natural sand resource shortage are solved.

Description

Technical field [0001] The invention relates to concrete, in particular to a concrete using waste concrete as aggregate. Background technique [0002] Concrete is the most commonly used raw material in construction, municipal engineering and other fields. As the population increases and the process of urbanization accelerates, the demand for concrete consumption in my country is increasing; this has led to the increasing demand for aggregates, the main raw material of concrete. Traditional concrete aggregates are made of natural sand and gravel. Extensive mining of natural sand and gravel has caused damage to the ecological environment. And natural sand and gravel are non-renewable resources, and the resources are depleted day by day. [0003] At the same time, the amount of waste concrete and bricks and stones generated by the construction industry is also huge. Huge disposal fees are required, and the stacking or landfill of waste concrete will occupy a lot of land and cause ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/02C04B14/06C04B14/38C04B18/14C04B22/06C04B18/16C04B103/22
CPCC04B28/02C04B18/146C04B14/06C04B14/386C04B22/064C04B18/167C04B2103/22Y02W30/91
Inventor 刘钊汐张晓莉王蓉
Owner 张晓莉
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