A kind of cementitious material gypsum-based ecological cement and production method thereof

Abstract

A cementitious material gypsum-based ecological cement, which is made of gypsum cementitious material, active admixture, and alkaline activator, and the weight ratio of each component is: 80-95 gypsum cementitious material, active admixture 8-15, basic activator 1-5. Advantages: the gypsum base produced by this technology ecology Cement does not need raw material grinding, nor kiln calcination, and does not emit carbon dioxide. It mainly uses various industrial waste residues and other solid wastes to directly grind cement to produce cement, and the effect of energy saving and emission reduction is extremely significant.

Description

technical field [0001] The invention relates to a high-strength water-resistant gelling material, in particular to a gypsum-based ecological cement used as masonry gypsum cement, dry-mixed gypsum mortar, plastering gypsum, and a production method thereof. Background technique [0002] Phosphogypsum is an industrial by-product in the process of wet production of phosphoric acid in the phosphating industry. Every ton of phosphoric acid produced will produce about 5 tons of phosphogypsum, which is one of the largest solid wastes in the chemical industry. At present, most of the phosphogypsum is used Open-air stacking and dumping into the sea are two ways to deal with it. Worldwide, only 25% of phosphogypsum has been recycled, and the remaining 75% is stacked as solid waste. Unused phosphogypsum stacking not only takes up a lot land, and cause serious pollution to the surrounding ecological environment such as groundwater, atmosphere, soil, etc. The phosphogypsum stockpiled in C...

AI Technical Summary

Problems solved by technology

[0002] Phosphogypsum is an industrial by-product in the process of wet production of phosphoric acid in the phosphating industry. Every ton of phosphoric acid produced will produce about 5 tons of phosphogypsum, which is one of the largest solid wastes in the chemical industry. At present, most of the phosphogypsum is used Open-air stacking and dumping into the sea are two ways to deal with it. Worldwide, only 25% of phosphogypsum has been recycled, and the remaining 75% is stacked as solid waste. Unused phosphogypsum stacking not only takes up a lot land, and cause serious pollution to the surrounding ecological environment such as groundwater, air, soil, etc. The phosphogypsum stockpiled in my country has exceeded 200 million tons, and the resource utilization rate of phosphogypsum is only 15%, which is still far below the world average level. Therefore, the harmless treatment and comprehensive utilization of phosphogypsum has become a research hotspot in the field of solid waste treatment and resource utilization, and is also an urgent need for the sustainable development of the phosphating industry. Building gypsum has the characteristics of fast setting and hardening, no shrinkage, light weight, It has been widely used as an interior decoration material due to its thermal insulation and energy-saving properties, but its application range is limited by its low strength and poor water resistance.