High-strength dry-mixed mortar prepared from industrial waste

Abstract

The invention relates to high-strength dry-mixed mortar prepared from industrial waste. The high-strength dry-mixed mortar contains the following components in parts by weight: 14-50 parts of agglutination aggregates, 50-86 parts of fine aggregates, 0.05-0.2 part of a water-retaining agent and 0.1-1.0 part of a water reducer, wherein the agglutination aggregates contains the following components in parts by weight: 30-50 parts of calcined dehydrate phosphogypsum, 35-45 parts of blast furnace slag powder, 4-8 parts of a cement clinker, 6-16 parts of limestone flour, 2-10 parts of quick lime and2-8 parts of a coagulation accelerator. By mixing the phosphogypsum with the blast furnace slag, the dry-mixed mortar has potential activity; and by utilizing the mixture of the phosphogypsum with the blast furnace slag as an admixture of the dry-mixed mortar, the peaceability of the mortar can be effectively improved, and the long-term strength and the like can be enhanced, so that the resourceutilization of industrial waste slag is increased, the use amount of cement is reduced, the energy source is saved, the environmental pollution is reduced, and the production cost of the dry-mixed mortar is greatly lowered.

Description

technical field [0001] The invention belongs to the field of building materials, and in particular relates to a high-strength dry-mixed mortar made from industrial waste. Background technique [0002] Dry-mixed mortar is an important part of construction engineering. According to the regulations of JG / T291-2011, it can be divided into masonry dry-mixed mortar and plastering dry-mixed mortar, and there are several strength grades. [0003] Compared with traditional mortar, dry-mixed mortar has the advantages of stable quality, low labor intensity, less material waste, and high construction efficiency. In the prior art, the main cementitious material of dry-mixed mortar is industrial waste such as cement or gypsum, and the amount of cement used is not less than about 15%, and the amount of gypsum is not lower than 30%. At present, through the popularization and use of dry-mixed mortar, it is found that there are still deficiencies in it, such as large amount of cement and hig...

AI Technical Summary

Problems solved by technology

[0013] In summary, the methods in the above-mentioned patent applications all have some disadvantages, such as the use of hemihydrate and anhydrous gypsum with high energy consumption; the dry-mixed mortar using industrial waste residues such as dihydrate gypsum has low strength and is only used for the walls of buildings. Body plastering, narrow application range, etc.