The New Building Materials-HPMC for Phosphogypsum Plastering Mortar

26 May.,2022

Hydroxypropyl methylcellulose HPMC for new phosphogypsum building materials refers to the reuse of phosphogypsum, which was previously regarded as "waste residue", after washing to remove phosphorus impurities, calcination and modification, etc. building materials.

 

Among the current interior wall plastering, the most discussed is light plastering plaster. This light plastering phosphogypsum is also summarized and developed from some shortcomings of traditional heavy plastering plaster. The thickness of gypsum will be piled up, and the stability in the later stage is relatively poor. The appearance of light gypsum has changed these, so major construction sites have begun to use light gypsum.

 

Hydroxypropyl methylcellulose HPMC for new phosphogypsum building materials refers to the reuse of phosphogypsum, which was previously regarded as "waste residue", after washing to remove phosphorus impurities, calcination and modification, etc. building materials. The new phosphogypsum wholesale building materials are widely used, including plastering mortar, self-leveling mortar, paperless gypsum board, gypsum strip board, gypsum decorative board and other building materials. "Among the three major building materials in my country - cement, lime and gypsum, Gypsum is a material that can breathe.

 

When the environment is wet, the gypsum wall absorbs water, and when it is dry, it releases water into the air, and the buildings built with gypsum are more comfortable." Zhao Yunlong, a consultant expert of the Gypsum Branch of China Construction Federation, said that my country has with the unique advantages of developing new building materials, the radioactivity of gypsum produced in Yunguichuan is extremely low, which fully meets or even exceeds the standard. In addition, the sprayed composite wall made of new gypsum also has the characteristics of light weight, fire prevention, heat preservation and sound insulation. Therefore, with the continuous improvement of people's requirements for the living environment, it is a general trend in the future that gypsum replaces cement to become the "new favorite" of the building materials industry.

 

Lightweight plastering gypsum mortar is synonymous with a new type of thing, and it is also the most popular material for exterior wall plastering. Manufacturers who produce this material will promise that there will be no hollowing and cracking. It is an upgraded material for ordinary plastering gypsum. However, there are still some people who question that the viscosity and strength of lightweight plastering phosphogypsum have increased a lot from the perspective of production technology. During the process of wall construction, as long as normal operation is performed, there will be no short-term hollowing and cracking. Even if it occurs, the local wall is relatively dry, which makes the plastered gypsum lose water too quickly, resulting in a later decrease in strength and hollowing and cracking. Therefore, from the above simple analysis, it can be known that the probability of hollowing and cracking of lightweight plastering phosphogypsum is very small, but if it does not crack, the answer is that there will be a certain risk.

 

Phosphogypsum mortar is an industrial by-product formed by the reaction of phosphate rock in the process of preparing phosphoric acid. The main component is calcium dihydrate, the same as natural gypsum. In addition, it also contains a small amount of impurities such as phosphorus, fluorine and organic matter. As a major province of phosphorus chemical industry, the current wholesale stock of phosphogypsum mortar in Guizhou Province has reached 120 million tons, and the annual increase is as much as 13 million tons. At present, the treatment of high-quality phosphorus gypsum mortar in my country is mainly based on stockpiling, and the comprehensive utilization rate of resources is still relatively low, which is also a worldwide problem. The cost brought by the massive accumulation of phosphogypsum has become a major problem that plagues the healthy development of the phosphating industry.

 

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