Mortar for packing and pouring

Abstract

Mortar for packing and pouring is composed of 20%-50% of Portland cement, 2%-30% of a volume stabilizer, 2%-30% of a mixing material, 16%-65% of sand, 1.5%-3% of cellulose ether, 0.01%-2% of an air entraining agent, 0.2%-5% of a thixotropic lubricant, 1%-6.0% of redispersible latex powder, 0.2%-0.25% of a water reducer, and 0.15%-0.25% of a retarder. The mortar has good adhesion power, high strength and high impermeability, and has the 14 d bonding strength of more than or equal to 0.6 MPa, the 28 d flexural strength of more than or equal to 3.5 MPa, the 28 d compressive strength of more thanor equal to 21 MPa, the shrinkage rate of less than -0.04%, and the impermeability of more than or equal to 2.1 MPa. The mortar can solve the technical problems of cracking and leakage from the material, is simple and feasible in operation method, and convenient and simple in use process, has tools matched for use, is more dense in filling, can greatly reduce process defects from the process, reduces leakage risks, and is suitable for industrialized production and market promotion use.

Description

technical field [0001] The invention belongs to the field of industrial design of building materials, and in particular relates to a mortar used for filling and pouring. Background technique [0002] It is found that many buildings in areas with heavy rainfall in my country have a large amount of rainwater leakage hazards, which seriously affects the quality of human life. Moreover, the repair techniques are uneven and the repair costs are relatively high. In the phenomenon of a large amount of rainwater leakage, the leakage of external wall door and window connections and the leakage of screw holes account for a large proportion. The reason for the large amount of leakage in this area is that the impermeability of the raw materials is not good, the filling process is backward, and the traditional styrofoam filling process causes the risk of leakage in the opening of the external wall. Traditional styrofoam has characteristics such as low adhesion, weak support strength, an...

AI Technical Summary

Problems solved by technology

The reason for the large amount of leakage in this area is that the impermeability of the raw materials is not good, the filling process is backward, and the traditional styrofoam filling process causes the risk of leakage in the opening of the external wall

Traditional styrofoam has low adhesion, weak support strength, and unstable foaming ratio, which leads to weak bonding of the filling body, prone to problems such as insufficient filling or excessive expansion caused by overfilling.

Moreover, the edge trimming process after the on-site operators inject the styrofoam is cutting and trimming, which is easy to expose the inside of the filling material, resulting in water seepage

On the other hand, the filling and pouring mortar currently on the market is a dry hard mortar material, which has poor working performance, large shrinkage, poor impermeability, and easy cracking

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