Ultra-light foam gypsum, self-heat-preservation concrete block filled with same, and preparation method of the concrete block

Abstract

The invention discloses ultra-light foam gypsum, a self-heat-preservation concrete block filled with same, and a preparation method of the concrete block. The ultra-light foam gypsum is prepared by mixing gypsum slurry and foams, wherein the gypsum slurry includes: industrial byproduct gypsum, cement, additives and water. The self-heat-preservation concrete block filled with the ultra-light foam gypsum includes a hollow concrete block and the ultra-light foam gypsum, wherein the cavity of the hollow concrete block is filled with the ultra-light foam gypsum. The preparation method of the concrete block includes the steps of: preparing the hollow concrete block, preparing the ultra-light foam gypsum and preparing the self-heat-preservation concrete block. The ultra-light foam gypsum is lessthan 180 kg / m<3> in dry density and is less than 0.045 W / (m*K) in heat conductivity. The ultra-light foam gypsum and the hollow concrete block are bonded tightly and the concrete block is high in hardening speed; after filling operation, the concrete block is free of maintenance. The concrete block can save energy and utilize wastes, and has excellent heat preservation and fireproofing functions.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an ultra-light foamed gypsum, a self-insulating concrete block filled with the ultra-light foamed gypsum, and a preparation method for the block. Background technique [0002] Currently commonly used external wall insulation system materials such as polystyrene board, cement-based insulation mortar, foamed cement board, rock wool board, composite insulation mortar and self-insulation blocks have more or less problems. Organic insulation materials such as polystyrene boards cannot be used in a large area because they do not achieve Class A fireproofing effects and are prone to fire; Mortar and foamed cement products, because some manufacturers unrealistically reduce the bulk density index to a very low level, which directly leads to poor mechanical properties, and quality problems such as cracking and falling off are prone to occur after engineering applications. Wall self-insul...

AI Technical Summary

Problems solved by technology

The insertion of organic thermal insulation materials leads to poor combination between blocks and thermal insulation materials. Organic materials have poor fire resistance, and it is difficult to ensure thermal insulation effect and service life. Due to the slow hardening speed of filled foam concrete, foam concrete is easy to collapse after filling. Foam concrete The thermal conductivity coefficient is relatively large, the thermal insulation effect is poor, and the maintenance conditions required are high.