A kind of foam concrete and its application in the production of lightweight waterproof strips

Abstract

The invention discloses foam concrete and application thereof in production of a lightweight waterproof ribbon board. The foam concrete is prepared from the following raw material components in parts by weight: 30-50 parts of cement, 1-5 parts of a composite waterproof agent, 1-3 parts of a water reducing agent, 10-20 parts of coal ash, 1-5 parts of a foaming agent, 1-3 parts of latex powder, 3-10 parts of fine sand and 15-35 parts of water, wherein the composite waterproof agent is prepared from calcium stearate and sodium methyl silicate, and the mass ratio of the calcium stearate to the sodium methyl silicate is equal to (3 to 1)-(1 to 2). The lightweight waterproof ribbon board is produced by combining the foam concrete with a plurality of fiber grids, and has the characteristics of being good in thermal insulation performance, fire resistance and shock resistance, excellent in resistance to bending damage and water resistance, easy to cover and coat, low in cost, simple in manufacturing technology, and the like, thus being widely applied to construction engineering and being especially and effectively applied to floor slabs and roof boards, which are small in span, as well as wall body parts with a higher waterproof requirement.

Description

technical field [0001] The invention belongs to the technical field of building materials, and more specifically relates to foam concrete and its application in the production of lightweight waterproof strips. Background technique [0002] With the vigorous development of my country's construction industry and the deepening of the reform of wall materials, various non-load-bearing lightweight interior partition wall panels have developed rapidly in recent years. In order to meet the requirements of energy saving, fire prevention, environmental protection and waterproof in modern buildings, inorganic thermal insulation materials with relevant advantages have increasingly become an important direction for the development of energy-saving materials for modern buildings. Among them, foam concrete has excellent properties such as light weight, thermal insulation, sound insulation, non-combustibility and earthquake resistance, which can better meet the requirements of building ene...

AI Technical Summary

Problems solved by technology

Lightweight composite slats based on foamed concrete are widely used in internal partition walls of high-rise structures and load-bearing walls of low-rise structures. Floor and roof panels with small spans, as well as wall parts with high waterproof requirements, restrict the development of composite strip materials to a certain extent.

[0003] Invention patent CN 103321344 A discloses a cement slab and its production method, including two calcium silicate board layers arranged symmetrically, a foamed cement layer is arranged between the calcium silicate board layers, and the foamed cement board layer There is a gelling enhancer layer between the foam concrete layer and the calcium silicate board layer, which can effectively improve the bending resistance and impact resistance of the slats, but the connection between the foam concrete layer and the calcium silicate board layer requires the use of adhesives , increase the process, increase the cost, the gelling enhancer layer contains organic polymer additives such as emulsion, and there are certain problems in durability, and the large difference in shrinkage between the calcium silicate panel and the foamed concrete will cause cracks inside the foamed concrete , and even form through cracks, causing the panels to fall off and affecting product quality

Glass fiber or carbon fiber should not be effectively and evenly dispersed in this system, and they are easy to intertwine, resulting in poor integrity of the wallboard material. In places where there is no fiber or a small amount of fiber, it is easy to cause warping, deformation and cracking of the product

Therefore, there are high requirements on the material and use of fibers, and the production should not be controlled

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