Preparation method of phosphorus building gypsum-based water-resisting and self-leveling mortar

Abstract

The invention discloses a preparation method of phosphorus building gypsum-based water-resisting and self-leveling mortar. The anti-cracking mortar is prepared from the following components in percentage by mass: 50 to 90 percent of phosphorus building gypsum, 10 to 50 percent of baked sand, 0 to 20 percent of cement, 0 to 5 percent of fly ash, 0 to 15 percent of an active activator, 0 to 3 percent of a water repellent, 0.1 to 1 percent of a high-performance plasticizer, 0 to 0.2 percent of an anti-settling agent, 0 to 0.2 percent of a flocculating agent, 0.01 to 0.4 percent of a calcium sulfate retarder, 0 to 3 percent of a high-molecular polymer and 0.05 to 0.3 percent of a high-performance defoaming agent. According to the preparation method disclosed by the invention, phosphogypsum which is an industrial waste is used as a main raw material, so that the prepared self-leveling mortar is high in quality performance and high in water resistance, can be applied to a leveling project for indoor and outdoor grounds, is particularly applicable to a floor heating project and a wood floor base course leveling project, is high in coagulation and hardening speed, high in volume stability,high in temperature change resistance, and low in cost, and does not crack, and product properties meet relevant standard requirements; a production process is simple and low in energy consumption; compared with other self-leveling mortar products, the phosphorus building gypsum-based water-resisting and self-leveling mortar is higher in market competitiveness and high in practicability.

Description

technical field [0001] The invention belongs to the field of comprehensive utilization of waste resources and building materials, and particularly relates to a preparation method of phosphorus gypsum-based water-resistant self-leveling mortar. Background technique [0002] my country is the most populous country in the world, and agricultural production is crucial. With the development of agricultural production, the demand for chemical fertilizers is increasing. Phosphorus fertilizer can increase crop yield, improve crop quality, accelerate tillering of cereal crops and promote full grain; promote the flowering and fruiting of cotton, melons, solanaceous vegetables and fruit trees, and improve the fruiting rate; increase sugar content in sugar beet, sugarcane, watermelon, etc.; rapeseed oil content of the seeds. [0003] The demand for phosphate fertilizers has been increasing year by year, reaching 8.5 million tons in 2014. Phosphogypsum is an industrial waste residue di...

AI Technical Summary

Problems solved by technology

[0004] In recent years, with the improvement of people's material needs and the reduction of heavy physical labor, self-leveling mortar has gradually been favored by people. The construction efficiency of self-leveling mortar is extremely high, and it can accurately level the ground. Gypsum-based self-leveling mortar can be constructed in thick layers. It does not deform under the condition of thermal expansion and contraction, and is widely used in indoor floor heating projects and wooden floor installation projects; however, the water resistance of gypsum-based self-leveling mortar is poor, and the ground may appear strength cracking and corrosion when the ground is soaked in water or eroded by running water for a long time and other phenomena

[0005] The invention aims to overcome the disadvantage of poor water resistance of traditional gypsum-based self-leveling mortar, improve the water resistance of gypsum-based self-leveling mortar by various means, and provide a new way for the comprehensive utilization of phosphogypsum

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