Precise Block Crack Control Method of Autoclaved Sand Air-entrained Concrete

Abstract

The invention discloses an autoclaved sand aerated concrete accurate building block crack control method. The control method includes the following steps: construction preparation, primary processing, building block arrangement graph drawing, wall building, and heat insulation and damp-proof layer coating. In primary processing, building blocks are sprayed with water twice, and it is ensure that the water content of each building block is 8%-10% in construction; in wall building, an infrared radiation lamp is used to perform scanning type radiation on the built wall circularly, the number of cycles is 15-20, and a waterproof and damp-proof isolation fabric is attached on the built wall after scanning type radiation is finished; before the top building blocks are constructed, a surface of the built wall under the top building blocks is sprayed with water in a spraying manner, the built wall stands for at least 14 days, the top building blocks are constructed, and then the surface of the built wall is coated with a heat insulation and damp-proof layer, and plastering construction is performed. The control method is simple in construction process, can effectively overcome building block cracks, can prolong the service life of the building blocks, and can ensure the use quality of the wall.

Description

technical field [0001] The invention relates to the field of building construction, in particular to a method for precisely controlling cracks in autoclaved sand aerated concrete blocks. Background technique [0002] Autoclaved sand aerated concrete blocks are made of finely ground sand as the siliceous material, cement and quicklime as the calcareous material, and aluminum powder (paste) as the foaming agent. The foam-containing blocks made by curing are widely used in industrial and civil buildings. It is suitable for new construction, reconstruction, and expansion of industrial and civil buildings, and is suitable for self-supporting enclosure walls, self-insulating walls and internal partition walls of reinforced concrete structures and other structures. [0003] However, after the autoclaved sand air-entrained concrete block is dried, its interior shrinks, resulting in internal tensile stress. When the tensile internal stress exceeds the tensile strength limit of the m...

AI Technical Summary

Problems solved by technology

[0003] However, after the autoclaved sand air-entrained concrete block is dried, its interior shrinks, resulting in internal tensile stress. When the tensile internal stress exceeds the tensile strength limit of the material, the block will crack, causing damage to the building. However, there is no mature construction experience on how to control the generation of block cracks.