Special masonry mortar for insulating building block

Abstract

The invention relates to special masonry mortar for an insulating building block, and belongs to the building materials. The mortar is prepared from the following materials in parts by weight: 150-300 parts of cement, 70-120 parts of ground calcium carbonate, 10-25 parts of an additive and 580-750 parts of basalt. The special masonry mortar for the insulating building block is reasonable in proportion, has good inpeaceability, water-retaining property and binding strength. The special insulating building block for carrying out bricking on non-bearing and bearing insulating walls approximate to light bricks in dry shrinkage deformation and heat conduction has great meaning, and is wide in market prospect, and remarkable in economical and social benefits.

Description

technical field [0001] The invention belongs to building materials, and in particular relates to a special masonry mortar for thermal insulation blocks. Background technique [0002] At present, the country is vigorously advocating the development of energy-saving, land-saving, and waste-saving new thermal insulation exterior wall enclosure systems. There is an increasing demand for various non-load-bearing and load-bearing lightweight thermal insulation blocks. At present, ordinary masonry mortar is used to build To build lightweight wall blocks, ordinary masonry mortar is generally cement mortar or mixed mortar, and the apparent density of this type of mortar is generally 1600-1800kg / m 3 , the thermal conductivity is 0.18~110W / (mlK), while the apparent density of lightweight insulation blocks is generally 450~950kg / m 3 , the thermal conductivity is 0.115W~0.35W / (mlK). Due to the large difference in thermal conductivity between the two, there is a "cold bridge" phenomenon ...

AI Technical Summary

Problems solved by technology

[0002] At present, the country is vigorously advocating the development of energy-saving, land-saving, and waste-saving new thermal insulation exterior wall enclosure systems. There is an increasing demand for various non-load-bearing and load-bearing lightweight thermal insulation blocks. At present, ordinary masonry mortar is used to build To build lightweight wall blocks, ordinary masonry mortar is generally cement mortar or mixed mortar, and the apparent density of this type of mortar is generally 1600-1800kg / m 3 , the thermal conductivity is 0.18~110W / (mlK), while the apparent density of lightweight insulation blocks is generally 450~950kg / m 3 , the thermal conductivity is 0.115W~0.35W / (mlK). Due to the large difference in thermal conductivity between the two, there is a "cold bridge" phenomenon in the entire masonry, and the energy loss caused by the mortar joints in the masonry reaches about 25%. Thermal bridges were generated in the mortar joints, and even condensation appeared on the entire wall, and the long ciliates returned to alkali to make the wall moldy, which had an impact on the living environment. Although it was cleaned and painted, it was of no avail

Because the external insulation of the external wall is currently used, once the external wall cracks, the rainwater will enter the wall along the crack and will not evaporate easily, especially the external wall is protected by benzene boards, so once the rainwater enters the indoor wall, it will return to alkali for a long time Frigidity will never be resolved

In addition, the drying shrinkage coefficients between the two are also very different, resulting in unsatisfactory bonding between ordinary masonry mortar and lightweight blocks, and the strength of the masonry is affected during the dry-wet cycle of the entire masonry