Lightweight concrete and preparation method and applications thereof

Abstract

The invention discloses a lightweight concrete and a preparation method and applications thereof. The lightweight concrete is composed of raw materials such as cement, industrial waste residues, lightweight aggregates, a water reducing agent, water, an exciting agent and a polymer emulsion. The preparation method comprises the steps of carrying out surface treatment, mixing and stirring and the like on the raw materials. The lightweight concrete prepared by using the method disclosed by the invention can be used for being prepared into lightweight concrete blocks, because lightweight aggregates subjected to surface treatment and industrial waste residues subjected to activation are adopted in the production process of the lightweight concrete disclosed by the invention, and a specific polymer emulsion composed of a curing agent and resins is added, lightweight concrete blocks have the advantages of high strength and high toughness, and the weights of the lightweight concrete blocks are also reduced. In addition, the lightweight concrete disclosed by the invention also has the advantages of simple preparation method, convenience for operation, easiness for promotion and application.

Description

technical field [0001] The invention relates to a lightweight concrete and its preparation method and application. Background technique [0002] At present, ordinary concrete and concrete blocks used in the construction market generally have defects such as self-heavy weight, low flexural strength, poor toughness, and poor thermal insulation effect; some lightweight concrete blocks, such as aerated concrete blocks, have compressive strength Low, lower flexural strength, poor toughness and other defects, their folding ratio (or splitting ratio) can not meet the requirements of the national standard "Uniform Technical Specifications for Application of Wall Materials" (GB50574-2010). [0003] Among the concrete and concrete blocks sold on the market, there are no products added with polymer emulsions, and in the current published patents, there are reports of using polyvinyl acetate and polyacrylate as polymer emulsions to make concrete blocks. , but polyvinyl acetate is easil...

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Problems solved by technology

[0002] At present, ordinary concrete and concrete blocks used in the construction market generally have defects such as self-heavy weight, low flexural strength, poor toughness, and poor thermal insulation effect; some lightweight concrete blocks, such as aerated concrete blocks, have compressive strength Low, lower flexural strength, poor toughness and other defects, their folding ratio (or splitting ratio) can not meet the requirements of the national standard "Uniform Technical Specifications for Application of Wall Materials" (GB50574-2010)

[0003] Among the concrete and concrete blocks sold on the market, there are no products added with polymer emulsions, and in the current published patents, there are reports of using polyvinyl acetate and polyacrylate as polymer emulsions to make concrete blocks. , but polyvinyl acetate is easily destroyed and unstable in a strong alkaline environment, and cement base is a highly alkaline material, so it is not suitable to use polyvinyl acetate as a cement-based material. Another polymer emulsion, polyacrylate It can form a glossy and water-resistant film, which has the advantages of firm adhesion, not easy to peel off, flexible and elastic at room temperature, and good weather resistance, but its tensile strength is not high, which still cannot meet the high tensile strength of concrete blocks for users strength requirements

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