A kind of thermal insulation mortar and preparation method thereof

Abstract

The invention discloses a preparation method of high-strength thermal insulation mortar, and belongs to the technical field of building material preparation. The preparation method comprises the following steps: S1, mixing Portland cement, fly ash, limestone powder, polystyrene particles, bentonite, a thickening agent, heavy calcium carbonate powder, a tackifier and carboxyethyl methyl cellulose in parts by weight, and uniformly stirring to obtain slurry; S2, adding lauryl sodium sulfate into the slurry while stirring, stirring for 10 to 15min, and standing for 30 to 60min; and S3, adding calcium fluoride, a styrene-maleic anhydride copolymer or an organic silicon-polyurethane copolymer, sodium carbonate and hydrochloric acid on the basis of the step S2, and performing uniform stirring with a stirrer so as to obtain the high-strength thermal insulation mortar. The high-strength thermal insulation mortar can improve the compressive strength and reduce the dry apparent density, the heatconductivity coefficient and the volume water absorption rate.

Description

technical field [0001] The invention belongs to the technical field of building material preparation, and in particular relates to a thermal insulation mortar and a preparation method thereof. Background technique [0002] At present, my country's civil building energy-saving engineering requirements are getting higher and higher, and a large number of new building energy-saving materials and new processes have emerged in the market; among them, the thermal insulation mortar external wall thermal insulation system has played a very important role in modern high-rise buildings. Its reliable structural treatment has been recognized by the society, and it is one of the external wall thermal insulation methods with the most comprehensive advantages at present. Insulation mortar refers to the dry powder material for building thermal insulation made of inorganic lightweight aggregate, cementitious material, admixtures, fillers, etc. When used, it is mixed with water to make a slur...

AI Technical Summary

Problems solved by technology

This invention has the characteristics of good thermal insulation effect and good integrity of the thermal insulation system, but there are problems of low compressive strength of mortar, high thermal conductivity, dry apparent density and shrinkage rate

The main shortcomings are: (1) The thermal conductivity of the thermal insulation mortar is relatively large, and the thermal insulation performance needs to be improved

(2) The existing mortar preparation methods and equipment cannot meet the special requirements of thermal insulation mortar

The aggregate of thermal insulation mortar has a certain degree of brittleness. In the process of mortar preparation, due to reasons such as unreasonable mixing process, too long stirring time or excessive stirring intensity, etc., the thermal insulation aggregate is damaged and the thermal performance of the thermal insulation mortar is reduced.

(3) At present, the construction method of thermal insulation mortar is mainly manual plastering, which generally survives in multiple times, and the time interval between two plasterings is long. After the construction is completed, the curing and drying time of the thermal insulation layer is longer, and the construction period is long and the efficiency is low.

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