Premixed mechanized spraying mortar and production method thereof

Abstract

The invention relates to premixed mechanized spraying mortar. The premixed mechanized spraying mortar is characterized by being prepared from, by weight, 60-80 parts of aggregates, 10-15 parts of 42.5 Portland cement, 8-20 parts of fly ash, 1-3 parts of redispersible latex powder, 0.5-2 parts of cellulose ether, 0.1-0.5 part of wood fibers, 0.02-0.05 part of an air entraining agent and 0.05-2 parts of a super lubricant. According to the premixed mechanized spraying mortar, mortar rheology improvement is conducted by adopting machine-made sand taking limestone as mother rock as the aggregates, adopting the cement as a cementing material, adding the fly ash capable of improving the construction performance and doping an additive, and the mortar is not delaminated, not bled, not dispersed and not separated and is good in cohesiveness and extremely little in springback and mortar falling in the spraying construction process.

Description

technical field [0001] The invention belongs to the processing field of building materials, and in particular relates to a ready-mixed mechanized spraying mortar and a production method thereof. Background technique [0002] Mortar is one of the most widely used building materials in construction engineering, and it is widely used in masonry and plastering of buildings. In my country's current construction projects, more than 60% of buildings still use wall materials such as bricks and blocks, and the construction mortar used in masonry and plastering construction is still mainly cement mortar or mixed mortar. At present, my country needs about 600 million tons of sand for construction every year, and most of the areas use natural river sand. Natural river sand resource is a kind of local resource, which is non-renewable in a short time and not suitable for long-distance transportation. With the implementation of environmental protection policies, and because the excessive...

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Problems solved by technology

[0004] Machine-made sand is made by mechanical crushing and screening, and the particle size is less than 4.75mm. Compared with natural sand, the source of machine-made sand is rich and fixed, and it is easy to control the quality of raw materials. It is easy to produce defects such as stone powder in the production process and cannot completely replace natural sand. It is suitable for the production of mortar.

Therefore, the ready-mixed mortar produced with limestone machine-made sand as raw material has defects such as poor fluidity and high water penetration rate and cannot meet the requirements of mechanized construction. One of the main tasks of technicians at this stage

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