Repair mortar specially used for low-density autoclaved aerated concrete slabs

Abstract

The invention discloses a repair mortar specially used for low-density autoclaved aerated concrete slabs. According to a preparation method of the repair mortar, white Portland cement and sand are taken as base materials, and a filling material and a functional admixture are combined. The repair mortar comprises following ingredients, by weight, 20 to 30% of white Portland cement, 40 to 60% of sand, 0 to 15% of autoclaved aerated concrete milled powder, 0 to 15% of heavy calcium carbonate powder, 0.1 to 2% of dispersible adhesive powder, 0.01 to 0.5% of a water-retaining agent, and 0.01 to 0.5% of fiber. The repair mortar is convenient for construction and polishing; the texture of the repair mortar is similar to that of f autoclaved aerated concrete after hardening; and indexes, such as intensity, accords with existing standard requirements.

Description

technical field [0001] The invention mainly relates to a special repair mortar for autoclaved aerated concrete, which is mainly used for repairing low-density autoclaved aerated concrete slabs, and belongs to the technical field of building materials and construction. Background technique [0002] Autoclaved aerated concrete slab is a lightweight, porous, new type of green and environmentally friendly building material that uses cement, lime, silica sand, etc. as the main raw materials, and then configures and adds different quantities of anti-corrosion treated steel mesh according to structural requirements. At present, with the continuous improvement of building energy-saving requirements at home and abroad, autoclaved aerated concrete panels have been widely used in building exterior walls, Interior partition walls and roofs, etc. [0003] However, due to its low strength, low-density autoclaved aerated concrete slabs are prone to missing edges, scratches, and surface de...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a special repair mortar for low-density autoclaved aerated concrete slabs to solve the problems of poor construction performance of ordinary Portland cement repair mortar, low bonding strength with autoclaved aerated concrete, and poor aesthetics.