Alkali excitation fly ash dry mixing heat insulation plate bonding mortar and preparation method thereof

Abstract

The invention discloses alkali excitation fly ash dry mixing heat insulation plate bonding mortar and a preparation method thereof. The alkali excitation fly ash dry mixing heat insulation plate bonding mortar is prepared from the following ingredients in parts by weight: 20 to 30 parts of fly ash, 0 to 10 parts of cement, 0 to 10 parts of heavy calcium powder, 40 to 60 parts of aggregate, 0.8 to 1.5 parts of redispersible latex powder, 0.02 to 0.05 part of water-retaining agents, 0.02 to 0.04 part of wood fiber, 5 to 10 parts of sodium silicate, 1.2 to 1.5 parts of sodium hydroxide, 0.01 to 0.03 part of anti-cracking fiber and 0.3 to 0.6 parts of plasticizing agents. The dry mixing heat insulation plate bonding mortar provided by the invention has the advnatages that through the integral utilization of an alkali excitation principle and a polymer enhancing and toughening mechanism, the problems of great cement consumption, long coagulation time, slow intensity increase, low intensity, unstable product quality and the like of the conventional heat insulation plate bonding mortar can be solved; in addition, fly ash resources can be greatly utilized; the utilization of non-renewable resources such as cement can be reduced; the advantages of energy saving and environment protection are achieved.

Description

technical field [0001] The invention belongs to the technical field of building materials, and relates to an alkali-excited fly ash dry-mixed thermal insulation board bonding mortar and a preparation method thereof. Background technique [0002] It has been nearly 30 years since my country began the experimental research of external wall thermal insulation system in the mid-1980s. Thin plaster external thermal insulation systems such as EPS and XPS have become the mainstream products with the largest share in China's foreign thermal insulation market. At present, there are two basic forms of thermal insulation board bonding mortar for external thermal insulation systems on the market: one is a dry powder premixed mortar produced in a factory, and only water is added and stirred at the construction site to make a uniform thick slurry. The one-component can be used; the other is that the manufacturer only supplies polymer slurry, and the two-component can be used only when cem...

AI Technical Summary

Problems solved by technology

However, the cementitious material component of the bonded mortar of the external wall insulation board contains high-alumina cement. The cost of high-alumina cement is high, and there are problems such as unstable quality and fewer manufacturers. The ratio of binder to fine aggregate in the formula Almost 1:1, although higher bonding strength can be obtained, but the cost is higher, and the risk of later cracking and strength decline is greater

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