A kind of I-type inorganic building thermal insulation mortar with high fly ash content

Abstract

The invention relates to the technical field of building materials, in particular to high coal ash dosage I type inorganic building thermal mortar. The high coal ash dosage I type inorganic building thermal mortar is composed, by mass, of 45-55 parts of P.O 425 cement, 45-55 parts of secondary coal ash, 2.5-3.5 parts of sodium sulfate, 10-15 parts of ash calcium powder, 85-95 parts of glass bead, 0.2-0.4 part of hydroxypropyl methyl cellulose ether, 1-3 parts of VAE redispersible emulsion powder, 0.1-0.3 part of polypropylene fiber and 0.2-0.4 part of rosin air entraining admixture. The high coal ash dosage I type inorganic building thermal mortar has the advantages that the coal ash is used for replacing 45-55 percent of cement, the ash calcium powder and the sodium sulfate are used for exciting the activity of the coal ash, the mechanical property of the thermal mortar is improved, the proper cellulose ether and the redispersible emulsion powder are added to improve the working performance and the bonding performance of the mortar, the cracking resisting performance of the mortar is improved, the dry density and the heat conductivity coefficient of the mortar are lowered, and the heat preservation and insulation performance is improved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a type I inorganic building thermal insulation mortar with high fly ash content. Background technique [0002] As a typical representative of inorganic thermal insulation mortar, the application of vitrified microbead thermal insulation mortar in the internal and external insulation of enclosure structures has increased rapidly, and its development technology has received widespread attention. Compared with organic thermal insulation mortar, vitrified microbead inorganic thermal insulation mortar has obvious advantages in workability, fire resistance, durability, etc., but it has a larger self-weight and poor thermal insulation performance. Due to the performance characteristics of the vitrified microbead aggregate, the performance of the thermal insulation mortar prepared by the existing technology can only meet the standard of type II building thermal ins...

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Problems solved by technology

[0003] In summary, due to the consideration of strength, the amount of fly ash in the vitrified bead insulation mortar is generally not higher than 30%, which greatly limits the utilization of fly ash; at the same time, due to the characteristics of aggregate , the vitrified microbead inorganic thermal insulation mortar prepared in China is type II building thermal insulation mortar, with high dry density and thermal conductivity, which reduces the energy-saving effect of inorganic thermal insulation mortar and limits its application

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