Composite foamed cement heat retaining panel using high-volume fly ash and preparation method thereof

Abstract

The invention discloses a composite foamed cement heat retaining panel using high-volume fly ash and a preparation method thereof; the composite foamed cement heat retaining panel is prepared by 60-80 parts of cement, 20-40 parts of fly ash, 0.6-3.0 parts of moisture repellent, 0.12-0.30 part of a water reducing agent, 0.8-3.0 parts of an exciting agent, 0.3-0.50 part of anti-crack fiber, 30-60 parts of water and 4-8 parts of a foaming agent (by weight); the preparation method comprises the following steps: weighing each raw material; adding the water, the anti-crack fiber, the moisture repellent, the cement, the fly ash, the water reducing agent; stirring a mixture; adding the exciting agent; stirring the mixture; adding the foaming agent; stirring the mixture so as to prepare mixed slurry; then, injecting the mixed slurry into a mould; putting the mould statically for 4-5 hours; removing the mould; after 24 hours, cutting and packaging a product; and maintaining the product until age is 28 days. According to the invention, a part of the cement is substituted by fly ash; cost is low; environment pollution is reduced; and social efficiency and economic benefit are obvious.

Description

technical field [0001] The invention relates to the field of building materials, in particular to a composite foamed cement insulation board using a large amount of fly ash and a preparation method thereof. Background technique [0002] Fly ash is a waste material discharged from coal-fired power plants or thermal power plants. my country is a big energy-consuming country, and its energy structure is dominated by coal. In recent years, my country's energy industry has developed rapidly, and the discharge of fly ash has increased sharply, making it the largest ash discharge country in the world. In 2009, the discharge of fly ash exceeded 375 million tons, which brought huge pressure on my country's national economic construction and ecological environment. On the other hand, my country is a country with a low per capita share of resources. Therefore, how to turn fly ash into treasure and harm into profit has become an important technical and economic policy in my country's ...

AI Technical Summary

Problems solved by technology

[0004] However, due to the excessive use of ordinary Portland cement or Portland cement as the cementitious material, when pouring large mold specimens, the hydration speed is relatively fast, the heat release is large, the internal temperature is high, the shrinkage deformation is obvious, and cracking is easy to occur , strength shrinkage and other issues

Images