High-strength shrinkage-free cast-in-place foam concrete wall material and wall preparation method

Abstract

The invention discloses a high-strength shrinkage-free cast-in-place foam concrete wall material and a wall preparation method. The wall material comprises, by weight, 30-50 parts of cement, 10-30 parts of sand, 10-30 parts of water granulated slag, 5-25 parts of coal ash, 0.1-3 parts of silica fume, 0.1-3 parts of quick lime, 0.1-3 parts of water glass, 0.01-0.45 part of sodium fluosilicate, 0.1-3 parts of polypropylene fiber, 0.1-0.5 part of a water reducer, 0.1-1 part of a water-retentive and thickening admixture, water and a foaming agent, wherein the mass ratio of the dry mixed materials to the water is (0.35-0.45):1, and the mass ratio of the dry mixed materials to the foaming agent is (0.0125-0.125):1. The high-strength shrinkage-free cast-in-place foam concrete wall material is applied in the technical field of building walls, a reasonable raw material matching ratio is adopted, quite good fluidity and stability can be achieved, the prepared wall material is high in strength and small in shrinkage rate, and the using requirements for wall portions and the like of living buildings and public buildings are completely met.

Description

technical field [0001] The invention relates to the technical field of building materials, in particular to a cast-in-place foam concrete wall material. Background technique [0002] Foamed concrete is an important branch of lightweight concrete. In recent years, with the development of building energy saving and green environmental protection and fire prevention concepts, foamed concrete products have been widely used in the market, mainly because foamed concrete has light weight, fire prevention, good sound insulation and heat preservation. Performance, the same life as the building, the cast-in-place foam concrete can be combined with the main structure without a cavity, etc. Foam concrete industrial products mainly include: bricks, blocks, and panels, but their market applications are impacted by autoclaved aerated concrete products, and the market applications are less; cast-in-place foam concrete is widely used as thermal insulation and sound insulation cushions for fl...

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Problems solved by technology

[0008] At present, the main obstacles affecting the development and application of foam concrete products are: the strength of the product is low, the shrinkage rate is too large, and the strength of the wall after completion is lower than 5.0 MPa, which is difficult to meet the requirements of residential use. When the dry shrinkage rate exceeds 0.5mm / m, The cracks in the wall have increased a lot, and the putty and paint applied outside cannot eliminate the cracks and cracks

Therefore, the existing foamed concrete cannot meet the requirements of the walls of residential buildings and public buildings, and the cast-in-place concrete is only used in the thermal insulation and sound insulation cushion of the floor slab, the surface course of large-scale underground projects and other parts with very low technical requirements. application

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