High-strength cement-based self-leveling mortar

Abstract

The invention discloses high-strength cement-based self-leveling mortar powder and slurry. The mortar powder specifically comprises the following components in parts by weight: 25-27 parts of silicate cement, 5-10 parts of aluminate cement and / or sulphate aluminium cement, 5-8 parts of gypsum and a very small amount of aids, wherein the very small amount means that the weight of every single additive accounts for 0.05-0.5wt% of the total weight of the mortar powder. According to the mortar disclosed by the invention, the mortar body added with water in proportion is good in peaceability, and during the construction time, good flowability can be continuously maintained, and the loss is less; the mortar is high in hardening speed, and after 6-8 hours, people can walk on the mortar; the mortar is high in strength and can be used as a heavy load floor cushion. The self-leveling mortar product is good in workability, hard to crack in construction at a low temperatures (5-10 DEG C) and convenient to store.

Description

technical field [0001] The invention relates to a mortar, in particular to a single-component cement-based self-leveling mortar which can be used on concrete or mortar substrates, has alkali resistance, rapid solidification, high strength and excellent construction performance, and its raw material composition. Background technique [0002] One-component cement self-leveling mortar is used for the floor cushion, which has the advantages of good slurry fluidity and water retention, good adhesion to the substrate, rapid solidification at room temperature, excellent construction performance, and short construction period. [0003] Cement self-leveling mortar belongs to cement mortar with special functions. It has good fluidity and stability, high early strength, fast construction speed and low labor intensity. It is an ideal material for ground paving of large supermarkets, parking lots and warehouses. It is also a development direction of modern building ground construction, a...

AI Technical Summary

Problems solved by technology

On the one hand, it is because this material is not suitable for the national conditions at present.

Second, the current domestic economy and construction technology are relatively backward, and the cost of large-area use in construction projects is relatively high, which is difficult for users to accept

[0004] (1) The early strength is low. Since cement-based self-leveling mortar generally uses ordinary Portland cement as the most important cementing material, ultra-fine sand and high water-cement ratio are used, resulting in serious insufficient early strength of the mortar, 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

This leads to cracking after the mortar hardens

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