Mineral-powder-based admixture for dry-mixed plaster mortar and preparation method and application thereof

Abstract

The invention discloses a mineral-powder-based admixture for dry-mixed plaster mortar, which comprises the following components in percentage by weight: 60 to 70 percent of mineral slag micro powder, 3 to 6 percent of desulfurized gypsum, 5 to 10 percent of heavy calcium carbonate powder, 1.5 to 2.5 percent of cellulose ether, 5 to 10 percent of redispersible polymer powder (ethylene-vinyl acetate EVA) and the balance of fly ash. The mineral-powder-based admixture for the dry-mixed plaster mortar has the density of more than or equal to 2.5kg / m<3>, the specific surface area of more than or equal to 350m<2> / kg, and the water content of less than or equal to 1.0 percent. The dry-mixed plaster mortar can be prepared by mixing the mineral-powder-based admixture, cement and medium sand in a certain ratio uniformly. The mineral-powder-based admixture has high construction property, high physical and mechanical properties, long construction operable time, a good construction effect and high construction efficiency, and can be used for preparing the plaster mortar of a building wall external thermal insulation system and a building wall internal thermal insulation system.

Description

technical field [0001] The invention relates to a mineral powder-based admixture for dry-mix plastering mortar, a preparation method and application thereof, and belongs to the technical field of building materials. Background technique [0002] Energy conservation and comprehensive utilization of resources is a long-term strategic policy for my country's economic and social development. my country has formulated a series of relevant laws and policies, and one of the main objectives of the "Tenth Five-Year Plan" for Energy Conservation and Comprehensive Utilization of Resources issued by the State Economic and Trade Commission also clearly stipulates that "by 2005, 50 %; new public buildings strive to save energy by 50%. It is also pointed out that building energy-saving technology is one of the key development technologies, and the external thermal insulation composite wall is one of the main energy-saving technologies. In my country's "Eleventh Five-Year" national develop...

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Problems solved by technology

[0006] The present invention aims at the problems of building energy saving in my country at present, especially when the wall insulation system is in the ascendant, the production ingredients of the main component material of the wall insulation system—dry-mix plastering mortar are relatively complicated, the construction performance is unstable, and the fluctuation is large. Dry-mixed plastering mortar production process, optimization of dry-mixed plastering mortar mix ratio and performance, providing a mineral powder-based admixture for dry-blended plastering mortar with excellent comprehensive performance and low cost, its preparation method and application

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