Dry-mixed mortar and preparation method thereof

Abstract

The invention provides dry-mixed mortar and a preparation method of the dry-mixed mortar. The dry-mixed mortar comprises the following components in parts by weight: 10-20 parts of a binding material, 40-50 parts of a first fine aggregate with the grain size less than 1.2 mm, 20-30 parts of a second fine aggregate with the grain size of 1.2-2.4 mm, 10-20 parts of a mineral admixture, and 0-0.05 part of an additive; the binding material comprises 95-96 parts by weight of a pure clinker and 4-5 parts of gypsum powder. Based on the components and the component proportion of the dry-mixed mortar provided by the embodiment of the invention, the dry-mixed mortar is higher in workability, the construction operations of building, plastering, pumping and the like are convenient to carry out, and the construction efficiency is improved. Moreover, when the dry-mixed mortar is used for building, the one-time slurry spreading length is greatly increased, the times for spreading a slurry on a specified fundamental plane are reduced, the thickness of a slurry layer is reduced, the uniformity of the slurry layer is improved, the quality of the slurry layer is improved, the use level of the mortar is saved, the construction cost is lowered, and the repairing cost and the later maintenance cost of the slurry layer are avoided or reduced.

Description

technical field [0001] The invention relates to the technical field of materials, in particular to a dry-mixed mortar and a preparation method of the dry-mixed mortar. Background technique [0002] Dry-mixed mortar is usually called hydraulic cement mixed mortar, which refers to a granular or powdery physical mixture of dry-screened aggregates, inorganic cementitious materials and additives in a certain proportion, packed in bags or It is transported to the construction site in bulk and can be used directly after mixing with water. Dry-mixed mortar plays the role of bonding, lining, protection and decoration in a thin layer in the construction industry, and is widely used in construction and decoration projects. [0003] Although the existing dry-mixed mortar has achieved the functions of bonding, lining, protection and decoration, it has the following defects: the workability of the existing dry-mixed mortar is poor, which is not conducive to masonry, plastering and pumpin...

AI Technical Summary

Problems solved by technology

[0003] Although the existing dry-mixed mortar has achieved the functions of bonding, lining, protection and decoration, it has the following defects: the workability of the existing dry-mixed mortar is poor, which is not conducive to masonry, plastering and pumping, etc. The progress of construction operations leads to low construction efficiency; the length of one-time grouting during masonry is short, and more times of grouting operations are required to complete the laying of the specified base surface, and multiple grouting operations will result in a thicker grout layer And uneven, which leads to poor construction quality, more material consumption, higher construction costs, higher maintenance costs and other problems

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