Cement-based composite foam insulation board and preparation method thereof

Abstract

The invention discloses a cement-based composite foam insulation board and a preparation method thereof. The cement-based composite foam insulation board is prepared from the following raw materials by weight percent: 45-55% of ordinary portland cement, 5-15% of fly ash, 0.2-0.5% of water repellent, 0.3-0.5% of enhancer, 0.2-0.3% of reinforced fiber, 1-2% of latex powder, 2-5% of foaming agent and 32-38% of water. The method comprises the following steps: firstly, adding water to the ordinary portland cement, the fly ash, the water repellent, the strength agent, the latex powder and the reinforced fiber and stirring for 3-5 minutes according to the weight percent; then adding the foaming agent and stirring for 5-10 seconds; rapidly injecting into a mold to foam; demolding after solidifying for 12 hours; cutting and packaging to form the product after maintaining. The product prepared by the method is low in manufacturing cost, and simple in method, and the quality performance is higher than relevant national standards.

Description

technical field [0001] The invention relates to a building insulation material, in particular to a cement-based composite foam insulation board and a preparation method thereof. Background technique [0002] According to statistics, at present, 35% of my country's total energy is consumed in buildings, and the construction area of ​​new urban and rural buildings is more than 2 billion square meters every year, of which more than 50% are high-energy-consuming buildings; the existing buildings are nearly 40 billion square meters, 80% Above are high energy consumption buildings. High energy consumption brings high pollution. my country's energy consumption per unit building area is 3 to 5 times that of developed countries, causing a heavy energy burden on society and serious environmental pollution, which has become a prominent problem restricting the sustainable development of my country's economy. Therefore, promoting building energy conservation is the most important and urg...

AI Technical Summary

Problems solved by technology

At present, building insulation methods include external wall insulation, internal wall external insulation and wall self-insulation. Among them, building external wall insulation technology is the main way of building energy-saving technology in my country, mainly using polystyrene foam board, As insulation materials, extruded boards have the characteristics of light weight and high insulation performance, but as organic insulation materials, their fire protection rating is poor, and toxic gases are released when heated.

Especially in high-rise buildings, there are great safety hazards. Therefore, the main building energy-saving method of external wall insulation is in urgent need of an inorganic thermal insulation material that is safe, environmentally friendly, high in fire protection, convenient in construction, and good in thermal insulation performance to replace polystyrene boards, etc. Organic thermal insulation materials, some domestic manufacturers have developed cement-based foam boards as external thermal insulation materials for external walls, but because most of them use rapid hardening cement as the main material, the products have quality problems such as low strength and easy pulverization

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