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: 10-50 parts of a binding material, 50-70 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, 50-60 parts of a mineral admixture, and 2-5 parts of an additive; the binding material comprises 95-96 parts by weight of a pure clinker and 4-5 parts by weight of gypsum powder; the additive comprises one or more of a latex powder, a water repellent, a stabilizer, cellulose, a wood fiber, starch ether, a thixotropic lubricant and an air entraining agent; the first fine aggregate and the second fine aggregate are obtained by crushing and shaping a raw stone step by step, and have the characteristics that the particle is round and is not elongated or flaky, and the obtained dry-mixed mortar is higher in workability, flows conveniently, is easy to level in the construction, is high in construction efficiency and high in adhesive property, and has the special functions of waterproofness, thermal insulation and the like.

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 existing dry-mixed mortar has poor workability and is not easy to flow and level the construction; the dry-mix...

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 existing dry-mixed mortar has poor workability and is not easy to flow and level the construction; the dry-mixed mortar is laid on the foundation After the surface, the bonding force between the base surface and the base surface is weak, and the layer structure formed is unstable; the waterproof performance and heat insulation performance are weak, so it is necessary to lay a waterproof layer or heat insulation layer on the outer surface of the dry-mixed mortar, resulting in construction steps Anti-lock, low construction efficiency and high construction cost

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