Light masonry mortar with heat insulation and preservation

Abstract

The invention discloses a light masonry mortar with heat insulation and preservation, comprising the following components by weight percent: 20 percent to 65 percent of portland cement, 5 percent to 50 percent of fly ashes, 0 percent to 50 percent of furnace bottom slag, 0 percent to 55 percent of slag, 10 percent to 23 percent of vitrified microspheres, 0.1 percent to 1.0 percent of water retention and thickening materials, 0.1 percent to 0.5 percent of lignocellulose and 0.1 percent to 1.0 percent of water reducing agent. The mortar has the dry density of 750 to 1000 kg / m<3>, the thermal conductivity of 0.15 to 0.20 w / m k, the lowest compressive strength of 5 Mpa and the liner shrinkage rate of less than 0.1 percent, satisfies the requirements of heat insulation and preservation of an energy-saving building, has the advantages of favorable heat insulation and preservation performance, favorable water retention, favorable workability, high adhesion strength of a wall body, simple construction, energy saving, environmental protection and the like, completely avoids the occurrence of the phenomenon of cold bridge, and efficiently prevents dry-shrinkage cracking and the phenomenon ofmoisture absorption of the wall surface.

Description

technical field [0001] The invention relates to a masonry mortar, in particular to a heat-insulating light-weight masonry mortar used for porous lightweight heat-insulating bricks or light-weight heat-insulating blocks of walls, and belongs to the technical field of building materials. Background technique [0002] With the continuous improvement of environmental protection and energy conservation requirements, the energy-saving and thermal insulation technology of building envelope has become one of the important building energy-saving technical approaches in our country. Energy-saving and waste-recycling new wall materials for heat preservation and insulation have achieved rapid development. New energy-saving wall materials such as porous lightweight insulation bricks or lightweight insulation blocks have been more and more widely used in various non-load-bearing and load-bearing walls. application. However, most of the light-weight thermal insulation wall blocks are stil...

AI Technical Summary

Problems solved by technology

The dry density of the patented masonry mortar is ≤1600kg / m 3 , the minimum compressive strength is 2.5MPa, and the thermal conductivity is ≤0.24w / m·k, although this patent solves the problem of heat conduction between the masonry mortar used and the porous lightweight insulating brick or lightweight insulating block to a certain extent. The "cold bridge" problem of the entire masonry caused by the large difference in coefficients, but the gap between the dry density of the patented masonry mortar and the porous lightweight insulating brick or lightweight insulating block is still large, and the water retention Poor, but porous lightweight insulating bricks or lightweight insulating blocks have strong water absorption. Therefore, using the prepared masonry mortar has problems such as easy shrinkage and cracking, easy moisture absorption and low adhesion to the wall.