Wear-resisting anti-crack cement-based self-leveling mortar and its production method

Abstract

The invention relates to a wear-resisting anti-crack cement-based self-leveling mortar and its production method. The wear-resisting anti-crack cement-based self-leveling mortar is characterized by being prepared from, by weight, 20-35 parts of Portland cement, 10-15 parts of aluminate cement, 40-50 parts of aggregate, 10-15 parts of filler, 5-10 parts of mineral admixtures, 0.5-2 parts of redispersible powder, 0.5-1.5 parts of high-efficient reducing agent, 0.5-2 parts of expanding agent, 0.05-0.2 part of shrinkage reducing agent, 0.05-0.2 part of retarder, 0.1-0.3 part of water-retaining agent, 0.05-0.1 part of super plasticizer, 0.05-0.2 part of antifoaming agents. The wear-resisting anti-crack cement-based self-leveling mortar is simple, convenient and fast in construction, and featured by high intensity, good mobility, wear-resistance, good crack resistance, high bonding strength, and excellent construction performance; the wear-resisting anti-crack cement-based self-leveling mortar can automatically and accurately level the ground, and meet the construction purpose of rapid construction and fast use.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to a wear-resistant and crack-resistant cement-based self-leveling mortar for building indoor floors and a production method thereof. Background technique [0002] Cement-based self-leveling mortar refers to a powdery material composed of cement-based cementitious materials, fine aggregates, fillers and additives. After mixing with water or emulsion, it has a certain fluidity for leveling the ground. Cement-based self-leveling mortar has the characteristics of very good fluidity, self-leveling ability, low shrinkage rate, high compressive strength, etc., which can reduce construction time and speed up construction progress, and is widely used in residences, workshops, hospitals, shopping malls, supermarkets, etc. Public building indoor ground and industrial ground leveling projects. [0003] With the development of my country's economy and the improvement of ...

AI Technical Summary

Problems solved by technology

[0004] (1) The early strength is low. Since the cement-based self-leveling mortar generally uses ordinary Portland cement as the main cementing material, ultra-fine sand and high water-cement ratio are used, the early strength of the mortar is seriously insufficient, which directly affects the construction process. and the time when the project was put into use

[0005] (2) The flatness of the mortar surface is not enough. Due to the imperfect mortar formula, it is easy to produce surface sanding, peeling, hollowing, etc., which not only affects the appearance, but also directly endangers the quality of self-leveling mortar

[0006] (3) Insufficient wear resistance, self-leveling mortar is mainly suitable for large supermarkets, shopping malls, parking lots, factory workshops, warehouses and other floors, which require high wear resistance

[0007] (4) After the mortar is hardened, it is easy to shrink and crack. First, the cement will shrink in volume during the hydration reaction; secondly, the self-leveling mortar is constructed in a thin layer, and the evaporation caused by the high surface / volume ratio produces a significant and rapid Physical shrinkage, which leads to cracking after the mortar hardens

Images