Mortar for building burning-free thermal-insulation bricks

Abstract

The invention relates to mortar for building burning-free thermal-insulation bricks, which are prepared by the following steps: weighing the raw materials in a mixing ratio, delivering the raw materials to a mixer, and uniformly mixing to obtain finished products, wherein the bricks comprise the following raw material in part by weight: 704 to 796 parts of medium coarse sand, 234 to 324 parts of common portland cement, 35 to 50 parts of electric furnace slag, 33 to 40 parts of pulverized coal, 20 to 35 parts of expanded perlite, 1.4 to 2 parts of straw, 5 to 7 parts of shuck, and 177 to 200 parts of water. The special building mortar for burning-free thermal-insulation bricks, which is produced by the applicant, has high pressure strength, high shearing strength, high water holding performance, high thermal insulation performance and low radioactivity; and the mortar is close to the complete burning-free thermal-insulation bricks in properties such as density, heat conductivity, shrinkage deformation and the like; the mortar has high adaptability and adhesive force with the burning-free thermal-insulation bricks; the cold and heat bridge effect at the joint parts of the bricks is relieved; the cracking and moisture absorption of the wall face are prevented; and thus, the mortar meets the requirements on thermal insulation and heat preservation for building energy conservation.

Description

technical field [0001] The present invention relates to building materials, in particular to masonry mortar. Background technique [0002] The development of energy-saving buildings is in line with the national industrial policy. One of the main methods of building energy conservation is to improve the energy-saving indicators of the building envelope, especially the wall. Among them, the wall self-insulation technology has the same lifespan as the building, low cost, convenient construction, and easy maintenance. The advantages of transformation and safety are important directions for the reform and development of energy-saving wall materials in the future. Various new self-insulating wall materials such as thermal insulation concrete building blocks, sintered thermal insulation hollow blocks, autoclaved aerated concrete block bricks, lightweight porous bricks, fly ash block bricks, etc. are used in various load-bearing and non-load-bearing walls. The application in the bo...

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Problems solved by technology

[0003] However, most of the masonry mortars currently used in conjunction with the above self-insulating wall materials are ordinary mortars. When this type of mortar is used in conjunction with self-insulating walls, there are the following problems: 1. The masonry mortar is often due to the high water absorption of the substrate and The matrix strength matching effect is poor, and the shedding phenomenon occurs; and the drying shrinkage coefficient between the two is also very different, which makes the strength of the entire masonry decrease during the dry-wet cycle process, which seriously affects the quality of the entire wall.

However, when any kind of insulation material is used alone or in an improper amount, various disadvantages will occur.

The surface of ultra-light ceramsite is rough and porous, and the water absorption is large, which leads to poor workability of freshly mixed ceramsite mortar, which is not easy to meet construction requirements; expanded perlite has a large capacity and high water absorption rate, and its thermal performance is unstable in the brick body, and its volume shrinkage rate is large; Benzene particle organic material is flammable, poor in fire resistance, harmful gas is produced at high temperature, low in aging resistance and weather resistance, and poor in heterogeneity

In addition, when preparing masonry mortar, if the amount of cement mixed in is too high, the production cost will be increased; if industrial waste residue is used, due to the low activity of industrial waste residue, improper dosage will cause the performance of masonry mortar to fail to meet the relevant national standards. Require

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