Lightweight concrete, multifunctional protective board using the same and preparation method

Abstract

The invention belongs to the fields of building materials and construction technology. Light-weight concrete consists of a concrete base layer and waterproof surface layers, wherein the concrete base layer comprises the following components in parts by weight: 100 parts of cement, 0.1-10 parts of chrysotile fibers, 0.01-2 parts of water repellent, 10-30 parts of pulverized fuel ash, 0.1-6 parts of water reducer, 50-200 parts of water, and 1-20 parts of foaming agent or air entraining agent; the upper side and the lower side of the concrete base layer are coated with the waterproof surface layers which comprise the following components in parts by weight: 100 parts of penetrating type organosilicon waterproofing agent, 0.1-20 parts of nano TiO2, 0-2 parts of activity enhancer, 0.01-5 parts of dispersion stabilizer, and 50-200 parts of solvent. Correspondingly, the microporous structure of the foam concrete or air-entrained concrete is uniform, and the mechanical performance is improved.

Description

technical field [0001] The invention belongs to the field of new building materials and construction technology, and relates to a multifunctional protective board and a preparation method. Background technique [0002] The lightweight concrete developed in recent years provides new options for energy-saving and multifunctional wall materials. For example, the Chinese patent No. 201120305074.8 discloses a lightweight concrete that can fill or separate frames in house construction. High-quality high-strength foamed cement building walls. [0003] Some scholars try to add active admixtures, microscopic fibers (glass fibers, carbon fibers, polyester fibers, polypropylene fibers, etc.) or / and accelerators to cement to obtain lower-density lightweight concrete walls. For example, Chinese Patent No. 201010264056.X discloses a foam concrete and its preparation method, which is mixed with ore powder, fly ash, waterproofing agent, polypropylene fiber and auxiliary materials to obtain...

AI Technical Summary

Problems solved by technology

The main defects of this patent are: on the one hand, foam concrete generally has high hygroscopicity, and the efficiency of degrading pollutants will be significantly reduced when the humidity is high; on the other hand, all foam concrete products are double-doped with nitrogen-doped titanium dioxide, and the cost is high. In fact, pollutants are mainly adsorbed on the surface of the product; at the same time, the necessary volume shrinkage resistance, heat insulation and shock resistance of hardened foam concrete materials are not fully considered.

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