Composite foaming cement board used for external thermal insulation system of external wall and production method thereof

Abstract

The invention provides a composite foaming cement board used for an external thermal insulation system of an external wall and a production method of the composite foaming cement board. The composite foaming cement board is mainly made of the following materials in parts by weight: 220-170 parts of cement, 40-70 parts of coal ash, 0.2-0.5 parts of water repellent, 0.9-1.5 parts of high-efficiency water reducing agent, 0.4-0.7 parts of propyl benzene emulsion, 5-10 parts of calcium chloride, 4-8 parts of aluminum sulfate, 1.5-2.2 parts of pp fiber, 10-15 parts of foaming agent, 1.2-1.5 parts of nanometer modified calcium stearate, and 100-120 parts of water. The composite foaming cement board has high tensile strength and compressive strength, good in water resistance and excellent heat insulation performance and hardly cracks when used in external wall thermal insulation construction.

Description

Technical field [0001] The invention belongs to the field of external wall thermal insulation systems, and specifically relates to a composite foamed cement board for external wall thermal insulation systems and a production method thereof. Background technique [0002] Composite foam board is a kind of closed-cell lightweight inorganic foam insulation board made by foaming, curing, cutting and other processes. It can be used in the construction of external wall insulation system of house construction, replacing the previously commonly used polystyrene board. Or extruded board as a representative of organic combustible insulation materials. [0003] The existing composite foam board has the following defects: most of the products use sulphoaluminate cement as the main material, the tensile strength and compressive strength are too low; it is severely pulverized when exposed to water; the brittleness is large, and the external wall insulation construction is easy Cracking; The inte...

AI Technical Summary

Problems solved by technology

[0003] The defects of the existing composite foam boards are as follows: most products use sulphoaluminate cement as the main material, and the tensile strength and compressive strength are too low; they are severely pulverized when exposed to water; Cracking; the internal cells of the foam board are large and have different pore sizes, and the thermal insulation performance is difficult to meet the standard