Special mortar for masonry with light-weight insulating bricks and preparation method thereof

Abstract

The invention relates to mortar special for the masonry of light-weight insulating bricks, which comprises the following raw material compositions in portion by weight: 15 to 35 portions of fly ash, 20 to 40 portions of perlite, 1 to 7 portions of bentonite, 1 to 10 portions of hydrated lime, 1 portion of cellulose ether, 200 to 350 portions of sand, 50 to 100 portions of pottery sand, and 100 portions of cement. The preparation method thereof comprises the following steps that: 1) the fly ash, the sand, the pottery sand, the bentonite, the hydrated lime, the cellulose ether and the cement are evenly mixed through a machine according to the weight ratio respectively; 2) the perlite is added into the mixture according to the weight ratio, and the even mixing is performed through the machine again; and 3) mixed mortar is subjected to quota packaging. The mortar has the advantages of simple preparation technology, low drying shrinkage, high strength, low heat conductivity coefficient, good frost-resistant durability, and good thermal insulation effect, and solves the problems of cold and hot bridges, cracking and water leakage, poor thermal insulation performance, and the like existing on wall bodies which use common masonry mortar.

Description

technical field [0001] The invention belongs to a building material, and in particular relates to a special mortar for masonry of lightweight heat-retaining bricks and a preparation method thereof. Background technique [0002] With the promulgation of the national wall material innovation policy and the development and progress of building energy-saving technology, various types of lightweight thermal insulation bricks have been widely used, but at present, lightweight thermal insulation bricks are still mostly made of ordinary mortar. The dry bulk density is generally 1500 ~ 1900kg / m 3 , the thermal conductivity is 0.7-1.2W / m·K, and most of them are prepared on the construction site, which is greatly affected by the conditions of the construction site, resulting in unstable strength and performance of the mortar. The dry bulk density of lightweight insulation bricks is generally 350-950kg / m 3 , the thermal conductivity is 0.07~0.25W / m·K, and the strength is relatively ba...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of special mortar for masonry of light-weight insulating bricks and its preparation method. High strength, low thermal conductivity, good frost resistance and durability, can effectively solve many problems such as poor thermal insulation performance, poor frost resistance durability, short service life, and poor workability of walls built with ordinary mortar