Self-heat insulation aerated concrete building block and mortar for construction of building blocks

Abstract

The invention provides a self-heat insulation aerated concrete building block and mortar for construction of building blocks, and relates to the field of building walls. The building block is prepared by the following components in parts by weight: 60-110 parts of a siliceous material and 25-65 parts of a calcareous material which are used as main materials, 2-6 parts of vitreous beads, 5-30 parts of an additive, 0.07-0.2 parts of a foaming agent, 1-10 parts of a foaming conditioning agent, 0.08-0.2 parts of a foam stabilizer, and water. The building block has the advantages of fire prevention, flame retardation, good mechanical strength, low heat conduction coefficient, and good thermal insulation performance. The mortar is mixed from the following components in percentages by weight: 15-45% of Portland cement, 10-30% of coarse sand, 30-50% of fine sand, 0.05-0.15% of PP fiber, 0.02-0.07% of methyl 2-hydroxyethyl cellulose, 3-5% of heavy calcium powder, 3-8% of coal ash, 0.5-1.5% of rubber powder, and water. The mortar has a high hardening volume density, so that generation of wall cracks and mortar joints is prevented, and thermal insulation performance of the wall is guaranteed.

Description

technical field [0001] The invention relates to the field of building walls, in particular to a self-insulating aerated concrete block and the mortar for building the block. Background technique [0002] Before the 1980s, the thermal insulation materials used in buildings in my country were almost all inorganic thermal insulation materials, and organic thermal insulation materials and metal thermal insulation materials were rarely used. [0003] Compared with inorganic insulation materials, organic insulation materials such as expanded polystyrene (EPS, XPS) and expanded polyurethane (PU) have the advantages of light bulk density, small thermal conductivity, and low water absorption. However, there are fire hazards in use; and there are also durability and service life issues. Inorganic thermal insulation materials such as aerated concrete are used in building energy conservation. The aerated concrete blocks made of aerated concrete can withstand sunlight and have a high se...

AI Technical Summary

Problems solved by technology

When used in combination with ordinary mortar, it is easy to cause cracks in the wall, large-scale cracks, hollowing and shedding of the plastering layer, which seriously affects the appearance quality and use function of the building. Problems that must be solved for thermal insulation walls

[0006] c. The "thermal bridge" generated by the mortar joints in the wall makes the wall unable to meet the requirements of thermal insulation and energy saving

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