Early-strength type cement-based thick-layer leveling mortar and use method

Abstract

The invention discloses early-strength type cement-based thick-layer leveling mortar and a use method. The early-strength type cement-based thick-layer leveling mortar is prepared from the following components in percent by mass: 10-20% of cement, 3-6% of reinforcing agent, 0-5% of excitant, 65.1-86.86% of filler and 0.14-3.9% of additive, wherein the additive is prepared from the following components in percent by mass: 0-3% of redispersible latex powder, 0.03-0.5% of super plasticizer, 0-0.2% of water-retaining agent, 0-0.1% of retarder, 0-0.1% of segregation-resistant agent and 0.01-0.2% ofdefoaming agent. The use method comprises the steps of: uniformly mixing all the components according to the mass percents, packaging into bags and using by adding water according to a water-to-material ratio of 14-18%. The early-strength type cement-based thick-layer leveling mortar disclosed by the invention has the advantages of early strength, no shrinkage, wear resistance, water resistance,good constructability, segregation and bleeding resistance, low cost and no harmful chemical substances.

Description

technical field [0001] The invention relates to a leveling mortar, in particular to an early-strength cement-based thick-layer leveling mortar and a use method thereof. Background technique [0002] Cement-based thick layer leveling mortar is a powdery material that is pre-mixed in a factory with cement, reinforcing agent, activator, preferred graded aggregate components and additives in an appropriate proportion. When using it, just add water and stir it to become a self-leveling early-strength cement-based thick-layer leveling mortar with uniformity and suitable consistency that can meet the construction requirements. [0003] At present, the leveling mortar commonly used in engineering is mainly cement-based ground mortar. The traditional cement-based ground mortar has problems such as slow strength development, poor fluidity, surface powdering, easy cracking and hollowing, etc., which directly lead to unstable project quality and cannot reach Architectural design standa...

AI Technical Summary

Problems solved by technology

[0003] At present, the leveling mortar commonly used in engineering is mainly cement-based ground mortar. The traditional cement-based ground mortar has problems such as slow strength development, poor fluidity, surface powdering, easy cracking and hollowing, etc., which directly lead to unstable project quality and cannot reach Architectural design standards; and cement-based self-leveling mortar has not been widely used in the field of thick-layer leveling due to its disadvantages such as cost and high shrinkage

The cementitious material and water consumption of the existing ground leveling mortar are high, resulting in large shrinkage in the later stage, poor durability, and prone to hollowing and cracking; and the water range is narrow, and it is inconvenient for workers to use it when it is applied on the construction site, and it is easy to overdose Adding water causes segregation, bleeding and powdering on the surface; in addition, the fluidity of the existing mortar slurry is insufficient, and manual leveling is required, resulting in the flatness not meeting the requirements and low construction efficiency