Quick-hardening and high-flexibility cementitious grout and preparation method thereof

Abstract

The invention discloses quick-hardening and high-flexibility cementitious grout and a preparation method thereof. The quick-hardening and high-flexibility cementitious grout is prepared from the following components in percentage by mass: 25%-35% of quick-hardening sulphate aluminium cement, 45%-55% of aggregate, 10-15% of padding, 0.05%-0.2% of a water-retaining agent, 2%-5% of self-made rubber powder, 0.01%-0.2% of a water reducing agent, 0.01%-1% of an early strength agent, 0.1%-0.5% of wood fibers, 0.1%-0.5% of a water repellent, 0.1%-0.2% of a whiskering-resistant agent, 0.1%-5% of a pigment, 2-10% of talcum powder, and 0.5-3% of metakaolin. The quick-hardening and high-flexibility cementitious grout has excellent bending ad compressive strength, abrasion resistance and water resistance, the construction period is short, and the situation that when the quick-hardening and high-flexibility cementitious grout is used on certain base layers vibrating frequently or large in deformation, cracking and falling off are still avoided is met.

Description

technical field [0001] The invention relates to the field of joint fillers in the construction industry, in particular, the invention relates to a fast-hardening and highly flexible cement-based joint sealant and a preparation method thereof Background technique [0002] With the advancement of technology, the traditional cement slurry filling brick joints is gradually replaced by a new type of cement-based joint filler. The new type of caulking agent has become more and more widely used in construction in recent years, because its construction method is simple and its colors are diverse, which can meet different environments and different customer needs. However, in the process of extensive use, some technical difficulties and new technical requirements have also appeared in the joint sealant, such as the drying speed and hardening speed of the conventional joint sealant are slow, and the early strength is poor. Generally, it takes 24 hours to completely dry after filling t...

AI Technical Summary

Problems solved by technology

However, in the process of extensive use, some technical difficulties and new technical requirements have also appeared in the joint sealant, such as the drying speed and hardening speed of the conventional joint sealant are slow, and the early strength is poor. Generally, it takes 24 hours to completely dry after filling the joint; In a low-temperature and high-humidity environment, in the case of deep joints, the drying time is longer. According to JC / T 1004-2006 "Ceramic Wall and Floor Tile Joint Filler", the compressive strength of the sealant is only 28 days after curing. 15.0MPa

For another example, on some bases with frequent vibrations or large deformations, due to lack of flexibility, conventional joint fillers will crack and fall off, resulting in water seepage.