Method for preparing ground self-leveling mortar

Abstract

The invention relates to a method for preparing ground self-leveling mortar, and belongs to the technical field of self-leveling mortar. The ground self-leveling mortar is prepared as follows: pyrite beneficiation tailings are used as a raw material for crushing and screening to obtain powder with different particle sizes, the powder with different particle sizes and natural sand are mixed to obtain composite aggregate sand, sulphoaluminate cement, Portland cement and alpha-hemihydrate gypsum and the like are filled into a blender for mixing to obtain a three-element system cementitious material, the three-element system cementitious material, the composite aggregate sand, vinyl acetate / vinyl versatate copolymer latex powder, a defoaming agent and the like are filled into the blender for even mixing to obtain the ground self-leveling mortar. A small amount of ultrafine powder in the pyrite beneficiation tailings is attached to a three-element cementitious mortar interface region in a cement hydration process, and is filled into a large number of voids formed in the hydration process through the micro aggregate effect, a mortar hardened body structure is compacted, mortar strength and impermeability are greatly improved, and the mortar hardened body abrasion loss can be significantly reduced.

Description

technical field [0001] The invention relates to a preparation method of self-leveling mortar for ground, and belongs to the technical field of self-leveling mortar. Background technique [0002] Self-leveling material is a new type of ground material developed gradually at home and abroad in the 1980s. It has the advantages of good fluidity, easy construction, fast leveling speed, time-saving, thin leveling layer, good ground flatness, and high compressive strength. , can effectively solve the slow construction speed, poor flatness, easy sanding and other phenomena caused by plastering of traditional floor materials, which greatly meets the high requirements of new buildings on the base layer, and is suitable for ground repair and decoration projects. [0003] At present, self-leveling materials have become ideal materials for floor paving of large supermarkets, shopping malls, parking lots, factory workshops, warehouses, etc., and are also a development direction of modern ...

AI Technical Summary

Problems solved by technology

[0004] The technical problem mainly solved by the present invention is: the present invention provides a ground self-leveling mortar for the defects of shrinkage cracking, hollowing, skinning, poor surface wear resistance, poor surface flatness, and slow strength development in the traditional self-leveling mortar. The preparation method of mortar, the present invention uses pyrite beneficiation tailings as raw material to pulverize, screens out powders of different particle sizes, and mixes them with natural sand to obtain composite aggregate sand, then mixes sulphoaluminate cement, silicate Cement and α-hemihydrate gypsum are mixed in a mixer to obtain a ternary system cementitious material, which is then mixed with composite aggregate sand, vinyl acetate / ethylene tertiary carbonate copolymer latex powder, defoaming agent, etc. Put it into the mixer and stir evenly to get the self-leveling mortar for the ground. The invention uses a small amount of ultrafine powder in the pyrite beneficiation tailings to adhere to the interface area of ​​the ternary cementitious mortar during the cement hydration process. , through the micro-aggregate effect to fill a large number of voids formed during the hydration process, compacting the structure of the hardened mortar, thereby greatly improving the strength and impermeability of the mortar