Environmental-friendly industrial waste special anti-crack dry-mixed mortar and preparation method thereof

Abstract

The invention relates to environmental-friendly industrial waste special anti-crack dry-mixed mortar. The environmental-friendly industrial waste special anti-crack dry-mixed mortar comprises the following components in percentage by mass: 55-70% of sand, 20-25% of cement, 5-10% of a mineral admixture, 0.5-0.7% of a water retaining thickener and 0.1-0.3% of a water reducer. The mineral admixture is slag, coal ash or volcanic ash, the water reducer is a polycarboxylate-type high-performance water reducer, and the water retaining thickener is a mixture of 30-40% by weight of cellulose and 60-70% by weight of a thixotropic lubricant. The mortar provided by the invention is simple in component and low in production cost, and the water retaining property and crack resistance of the mortar are greatly improved, the utilization amount of a water resource is reduced, and the application range is improved. Therefore, the mortar is particularly suitable for various building construction sites.

Description

technical field [0001] The invention belongs to the technical field of mortar preparation, and in particular relates to an environment-friendly industrial waste special crack-resistant dry-mixed mortar and a preparation method thereof. Background technique [0002] At present, whether it is masonry mortar, plastering mortar or ground leveling mortar, the quality of the mortar prepared on the construction site is unstable, the strength cannot meet the requirements, and even poor quality leads to a series of problems such as cracking, leakage, hollowing, and falling off. Common quality problems. The dry powder mortar adopts industrial production, which can strictly control the raw materials and mix ratio to ensure the stable and reliable quality of the mortar. It is a semi-finished mortar made of accurate ingredients and uniform mixing in the factory. It can be used only by adding water and stirring at the construction site. There are many types of dry-mixed mortar, and its ...

AI Technical Summary

Problems solved by technology

[0003] The existing dry-mixed mortar still has the problems of poor water retention, cohesion and crack resistance, which reduces the stability and reliability of the mortar quality; and the composition is complex, which increases the production cost

At the same time, when using dry-mixed mortar, it is necessary to mix the appropriate proportion with water. Sometimes due to geographical location, a large amount of water resources cannot be supplied, which brings trouble to the actual construction site.