Method for improving initial fluidity of gypsum self-leveling mortar

Abstract

The invention discloses a method for improving the initial fluidity of gypsum self-leveling mortar. The method comprises: (1) weighing gypsum self-leveling mortar, weighing mixing water according to the standard consistency water consumption of the gypsum self-leveling mortar, adding 0.01-0.03% by weight of sodium carbonate into the mixing water based on 1000 parts by weight of the mixing water, adding the weighed gypsum self-leveling mortar after the sodium carbonate is dissolved, and stirring; and (2) pouring the stirred gypsum self-leveling mortar into a fluidity test mold, and testing thefluidity of the gypsum self-leveling mortar according to the JC / T 1023-2007 standard. According to the invention, the initial fluidity of the gypsum-based self-leveling mortar prepared in the invention is 148-150 mm, and the initial fluidity of the gypsum-based self-leveling mortar prepared without the adding of the magnesium ion elimination agent is about 142 mm, such that the initial fluidity ofthe gypsum self-leveling mortar of the invention is improved by 6-8 mm.

Description

technical field [0001] The present application relates to the field of building material technology and mortar technology, in particular to a method for improving the initial fluidity of gypsum self-leveling mortar. Background technique [0002] Gypsum self-leveling mortar is a ground self-leveling material composed of gypsum as the base material, aggregate and admixture. It has good fluidity and can accurately level the ground in a short period of time, which is conducive to the improvement of construction speed and Application of engineering materials. Compared with cement self-leveling mortar, the production of gypsum self-leveling mortar requires less energy consumption, less pollution, lighter mortar weight, and will not shrink and crack when subjected to alternating changes in cold and heat; at the same time, gypsum self-leveling mortar has good thermal insulation and fire resistance performance It is the best material for ground heating and floor leveling of hardcove...

AI Technical Summary

Problems solved by technology

At present, methods to improve the fluidity of mortar include adding water-retaining agent and increasing the amount of mortar mixing water, etc., but such measures will affect the subsequent performance of mortar. For example, water-retaining agent has a certain post-thickening effect. The loss of fluidity over time increases, which is not conducive to the construction of mortar; increasing the amount of mixing water will lead to the possibility of shrinkage and cracking of the mortar, and will affect the strength of the mortar

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