Rapid repair mortar and preparation method thereof

Abstract

The invention provides rapid repair mortar and a preparation method thereof. The rapid repair mortar is prepared from the following raw materials in parts by weight: 25 parts of PO42.5 cement, 21 parts of sulphoaluminate cement, 3 parts of gypsum, 50 parts of 20-80-mesh quartz sand, 0.2-0.3 part of a water reducing agent, 0.1-0.2 part of 6mm short fibers, 0.1-0.2 part of a defoaming agent, 0.5-1 part of rubber powder and 0.03-0.05 part of lithium carbonate. According to the preparation method, in the raw material conveying process, other different raw materials can be added, stirred and mixed, the whole process is in a continuous state, it can be guaranteed that all the raw materials are evenly mixed, and the production requirement can be met. The repair mortar has the advantages of high early strength, good fluidity, convenient construction, no shrinkage and no cracking, simplifies the work flow, and improves the production efficiency.

Description

technical field [0001] The invention relates to the technical field of repairing mortar, in particular to a quick repairing mortar and a preparation method thereof. Background technique [0002] At present, most of the repair mortars only include cement, sand and water reducer, and many of them cannot solve the problems of early strength and cracking. Especially in the cold winter, the strength is too slow to increase the construction period, and the road construction will cause the road to be closed for 14 days before it can be opened to traffic, which increases maintenance or maintenance costs. Moreover, due to the high strength of mortar, most repair mortars are prone to cracking due to cement hydration shrinkage etc., affect the quality of repair. [0003] In addition, when preparing the existing repair mortar dry powder, most of the raw materials are sieved first, and those that meet the particle size requirements under the sieve are added to the stirring device. Mater...

AI Technical Summary

Problems solved by technology

[0002] At present, most repair mortars only include cement, sand and water reducer, many of which cannot solve the problems of early strength and cracking

Especially in the cold winter, the strength is too slow to increase the construction period, and the road construction will cause the road to be closed for 14 days before it can be opened to traffic, which increases maintenance or maintenance costs. Moreover, due to the high strength of mortar, most repair mortars are prone to cracking due to cement hydration shrinkage etc., affecting the quality of patching

[0003] In addition, when preparing the existing repair mortar dry powder, most of the raw materials are sieved first, and those that meet the particle size requirements under the sieve are added to the stirring device. Materials with larger particle sizes on the sieve need to be recycled separately, and then sent to Crushing the crushed material in the device, and then sieving, the operation is cumbersome, which is not conducive to simplifying the work process and improving production efficiency, and all the raw materials are finally added to the same stirring device for stirring. Because the stirring device usually has a large volume, it is easy to mix a large amount of raw materials. Stirring is uneven, or the stirring time is too long

Images