Carbon fiber reinforced recycled aggregate concrete

A technology of recycled aggregate and recycled coarse aggregate, applied in the field of concrete, can solve the problems of high material processing cost, unsatisfactory effect, complex formula, etc., and achieve the effect of low processing cost, delayed consolidation time, and simple processing technology

Active Publication Date: 2016-08-24
CHONGQING THREE GORGES UNIV
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

But either the formula is complicated, the cost of materials and processing is too high; or the effect is not ideal; none of them can solve the problems of engineering application well.

Method used

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  • Carbon fiber reinforced recycled aggregate concrete
  • Carbon fiber reinforced recycled aggregate concrete
  • Carbon fiber reinforced recycled aggregate concrete

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Embodiment Construction

[0021] Introduce the specific embodiment of the present invention below, and comparative example and detection result situation; In order to demonstrate technical scheme and beneficial effect of the present invention in detail.

[0022] In the embodiment, the cement is 325 conventional cement, the sand is natural fine sand, the recycled coarse aggregate made by crushing waste concrete has a particle size of 20-40mm, the carbon fiber grade is T700, and the length is 10-20mm, and the retarder grade is 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 the aqueous solution and 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 ratio of C30, silica fume, carbon fiber, retarder, and slaked lime were added to prepare 10 groups of concrete s...

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Abstract

The invention relates to concrete and aims to provide carbon fiber reinforced recycled aggregate concrete with good comprehensive performance and low cost. Each cubic meter of the carbon fiber reinforced recycled aggregate concrete is prepared from 400-520 kg of cement, 630-780 kg of sand, 1,000-1,100 kg of recycled coarse aggregate, 1-7 kg of carbon fibers, 35-42 kg of silica fume, 1.2-2.0 kg of a retarder and 3.5-5 kg of slaked lime, wherein the carbon fibers are preprocessed with a silane coupling agent, and the length of the carbon fibers is 5-25 mm. sufficient combination of the recycled aggregate with a gel material and a reinforcing material is guaranteed, so that the compressive capacity and tension resistance capacity of the concrete are improved remarkably; further, the raw materials are common, a processing technology is simple, and a foundation is laid for wide application of waste concrete recycled aggregate.

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. With the increase of population and the acceleration of urbanization, the demand for concrete in my country is increasing; this also leads to the increasing demand for aggregate, the main raw material of concrete. Traditional concrete aggregates are made of natural sand. Extensive mining of natural sand and gravel has caused damage to the ecological environment. Moreover, natural sand and gravel are non-renewable resources, and the resources are becoming increasingly exhausted. [0003] At the same time, the amount of waste concrete, masonry fragments, etc. generated by the construction industry is also quite huge. A huge amount of treatment fee is required, and the stacking or landfilling of waste concrete will occupy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00C04B20/10C04B18/14
CPCC04B18/146C04B20/10C04B28/00C04B2201/50C04B14/06C04B18/167C04B14/386C04B2103/22C04B22/064C04B20/1051Y02W30/91
Inventor 强跃李莉王不凡王蓉
Owner CHONGQING THREE GORGES UNIV
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