Interior wall plastering mortar and construction method thereof

Abstract

The invention provides interior wall plastering mortar, which is prepared by mixing the following components in part by weight: 30 to 35 parts of ordinary Portland cement, 4 to 5 parts of hydrated lime, 5 to 10 parts of light aggregate, 50 to 60 parts of heavy aggregate, and 1.0 part of C-type composite auxiliary, wherein the light aggregate is an inorganic vitrified hollow cellular material of which the fineness is lower than 100 meshes; the heavy aggregate is ordinary river sand; and the C-type composite auxiliary is sold by Guangzhou Hecheng Trading Company. The construction method for the interior wall plastering mortar comprises the following steps: diluting the light energy-saving interior wall plastering mortar with water accounting for 30 to 50 percent of the weight of the mortar; and mechanically or manually stirring the diluted mortar until the mortar is mixed uniformly to achieve the viscosity suitable for mechanical spraying or manual construction. Therefore, the mortar can be sprayed mechanically or constructed manually. The interior wall plastering mortar has light weight and energy conservation, can prevent hollowness, cracking and falling off by being matched with a light wall body, can effectively reduce cracking of the mortar, ensures the quality of construction work, has the advantages of heat insulation and noise reduction, low cost of unit area, good grain composition, good peaceability, mechanical construction contribution and simple process.

Description

technical field [0001] The invention relates to a construction mortar, in particular to an interior wall plastering mortar and a construction method thereof. Background technique [0002] In current construction projects, lightweight walls such as aerated concrete blocks are often used, and the specific gravity of aerated concrete blocks is about 600-800Kg / m 3 , the thermal conductivity is 0.14-0.20W / (m K 25°C); the existing common interior wall plastering mortar is still used, and the composition and weight ratio of this common interior wall plastering mortar are generally: ordinary silicic acid Salt cement 18-25, slaked lime 0-5, limestone sand 60-75, additive 0.24-0.40, the specific gravity of this mortar is 1700-1800Kg / m 3 , not lightweight mortar, not suitable for lightweight walls; and the elastic modulus of this common interior wall plastering mortar is significantly greater than that of aerated concrete blocks, and the elastic modulus does not match, resulting in la...

AI Technical Summary

Problems solved by technology

[0002] In current construction projects, lightweight walls such as aerated concrete blocks are often used, and the specific gravity of aerated concrete blocks is about 600-800Kg / m 3 , the thermal conductivity is 0.14-0.20W / (m K 25°C); the existing common interior wall plastering mortar is still used, and the composition and weight ratio of this common interior wall plastering mortar are generally: ordinary silicic acid Salt cement 18-25, slaked lime 0-5, limestone sand 60-75, additive 0.24-0.40, the specific gravity of this mortar is 1700-1800Kg / m 3 , not lightweight mortar, not suitable for lightweight walls; and the elastic modulus of this common interior wall plastering mortar is significantly greater than that of aerated concrete blocks, and the elastic modulus does not match, resulting in large deformation of the plastering interface At the same time, the thermal conductivity of this ordinary interior wall plastering mortar is also high (0.93W / (m K 25°C)), which will produce a "thermal bridge" effect (due to the thermal conductivity of the light wall base and the mortar layer Different, uneven heat conduction will cause shrinkage and deformation, resulting in condensation, mold and even dripping on the wall, and then hollowing, cracking, and falling off, which is the "thermal bridge effect"), which will cause shrinkage and deformation, destroy the interface and produce hollowing , crack

In addition, the workability of this existing plastering mortar is poor, so many construction workers can only sprinkle cement powder on the surface to split the surface because it is difficult to lift the slurry, resulting in cracking on the surface of the mortar

Lime paste is also used to split the surface. Due to insufficient strength, the hollowing, peeling off of the finish, and flooding cannot protect the wall well.

In the process of mechanized construction, due to the large proportion of the existing interior wall plastering mortar, many consumables, heavy vertical transportation burden, no energy saving, and it is easy to cause the mortar machine to block the pump, pipe, and gun, which hinders the smooth progress of mechanized construction , often requires a lot of base surface watering and interface treatment, and is highly dependent on the construction personnel's technology. Due to the weight and insufficient bonding strength, there is a drop deformation, and multi-layer construction is required, and the construction efficiency is low.