C30 carbon fiber broken brick recycled concrete and preparation method thereof

Abstract

The invention discloses C30 carbon fiber broken brick recycled concrete. The concrete is prepared from the following raw materials in parts by weight: 380-400 parts of cement, 200-220 parts of water,650-670 parts of river sand, 610-630 parts of broken bricks, 7-9 parts of carbon fibers, 80-120 parts of fly ash, 40-60 parts of silica fume, 6-8 parts of a water reducing agent, 10-12 parts of an exciting agent, 0.9-1.2 parts of a dispersing agent and 0.6-0.7 part of a defoaming agent. The invention also provides a preparation method thereof. The materials available in the market are utilized inthe concrete; an improved concrete stirring process is adopted, and carbon fibers, silica fume, fly ash, hydroxypropyl methyl cellulose, chemical additives and the like are doped, so that the defectsof low strength, high brittleness, easiness in cracking and the like of broken brick recycled concrete are overcome, and the carbon fiber concrete with excellent workability, relatively high ductilityand a C30 strength grade is prepared.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a C30 carbon fiber broken brick recycled concrete and a preparation method thereof. Background technique [0002] At present, my country's urbanization is developing rapidly, and the development of urbanization will inevitably produce a large amount of construction waste, especially the most commonly used brick masonry materials in rural buildings. According to statistics, waste bricks account for 50%-70% in the construction waste of old city renovation, and 30%-50% in construction waste in building construction. If the construction waste is transported to the suburbs or rural areas by the construction unit without any treatment, it will be piled up in the open air or landfilled, which will consume a lot of construction funds such as land acquisition fees, garbage removal and transportation fees, and at the same time, the scattered and piled up waste in the...

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Problems solved by technology

[0004] The first purpose of the present invention is to solve the problem of low strength and high brittleness of broken brick recycled concrete, and provide a carbon fiber broken brick recycled concrete with a grade strength of C30, which uses readily available materials in the market and adopts an improved concrete mixing process. Add carbon fiber, silica fume, fly ash, hydroxypropyl methylcellulose, chemical admixtures, etc. to overcome the shortcomings of broken brick recycled concrete such as low strength, high brittleness, and easy cracking, so as to prepare excellent workability and high Ductile carbon fiber concrete of strength class C30

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