Aerated concrete block surface mortar and production method thereof

Abstract

The invention relates to aerated concrete block surface mortar.The aerated concrete block surface mortar is characterized by being prepared from, by weight, 60-80 parts of aggregate, 10-20 parts of 42.5 portland cement, 10-20 parts of coal ash, 0.1-0.3 part of a water reducing agent, 2-3 parts of redispersible latex powder, 0.1-0.5 part of cellulose ether, 0.1-0.5 part of wood fibers, 0.02-0.05 part of an air entraining agent and 0.5-3 parts of polypropylene fibers.The aerated concrete block surface mortar is easy to use, capable of saving energy and environmentally friendly and has good cohesiveness and water retentivity, and construction is convenient and fast; the mortar is soft and smooth, and batch scraping can be smoothly performed; the mortar has large adhesive force and high water retentivity, the use amount of the mortar is smaller than that of common mortar, the weight of a wall is reduced, and comprehensive benefits are good.

Description

technical field [0001] The invention belongs to the processing field of building materials, and in particular relates to a plastering mortar for aerated concrete blocks 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 ex...

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Problems solved by technology

[0004] Manufactured 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 abundant and fixed, and it is easy to control the quality of raw materials. In the production process, it is easy to produce stone powder, and in the process of plastering and rubbing, it is easy to produce too many sand holes and scratches, and it is also easy to cause defects such as sticking knives and difficulty in rubbing, so it cannot fully 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, which cannot meet the requirements of mechanized construction.

[0005] In addition, the masonry mortar used for aerated concrete blocks, due to the influence of the high water absorption rate of aerated concrete blocks, will quickly absorb the moisture in the mortar during masonry and plastering, making the mortar pulverized, resulting in mortar No structural force, easy to crack, affecting the structure of the entire wall surface; on the other hand, due to the water absorption of the aerated block, the expansion and contractility of the block increases, exceeding the plasticity of the crack-resistant mortar, resulting in cracks on the mortar plastering surface. In rainy days, rainwater will enter the wall along the cracks and affect the decoration of the interior wall

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