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Preparation method of phosphogypsum based high-energy long-acting expanding agent
The invention relates to a preparation method of a phosphogypsum based high-energy long-acting expanding agent, which comprises the step of uniformly mixing anhydrous phosphogypsum, soluble phosphogypsum, light calcined magnesia, dead burned magnesia, metakaolin and sodium silicate at a mass ratio of (50-100):(50-100):(20-40):(30-60):(100-150):(2-5) to form the phosphogypsum based high-energy long-acting expanding agent. The method has the benefit that expanding at different time and for a long time can be achieved. In addition, the expanding agent contains various expanding ingredients and has high expanding capability. High-energy long-acting expanding can be achieved by a combined action. Particular properties are as shown in the following table; results show that the expanding agent has a high expansion ratio and small influence on concrete strength; in addition, taking a mixing amount of the expanding agent as 3.5% for example, 90d and 180d confined expansion ratios of the expanding agent are 1.20% and 1.21% respectively, so that the expanding agent has long-term volume stability.
Preparation method of phosphogypsum based high-energy long-acting expanding agent
The invention relates to a preparation method of a phosphogypsum based high-energy long-acting expanding agent, which comprises the step of uniformly mixing anhydrous phosphogypsum, soluble phosphogypsum, light calcined magnesia, dead burned magnesia, metakaolin and sodium silicate at a mass ratio of (50-100):(50-100):(20-40):(30-60):(100-150):(2-5) to form the phosphogypsum based high-energy long-acting expanding agent. The method has the benefit that expanding at different time and for a long time can be achieved. In addition, the expanding agent contains various expanding ingredients and has high expanding capability. High-energy long-acting expanding can be achieved by a combined action. Particular properties are as shown in the following table; results show that the expanding agent has a high expansion ratio and small influence on concrete strength; in addition, taking a mixing amount of the expanding agent as 3.5% for example, 90d and 180d confined expansion ratios of the expanding agent are 1.20% and 1.21% respectively, so that the expanding agent has long-term volume stability.
Preparation method of phosphogypsum based high-energy long-acting expanding agent
XU MAN (author) / SHEN FAN (author) / SUN ZHENG (author) / JI JIAYOU (author) / WANG SHULIN (author) / CAO HONG (author) / SHI HEBIN (author) / XUE JUN (author) / CHEN CHANGLIAN (author)
2015-07-22
Patent
Electronic Resource
English
IPC:
C04B
Kalk
,
LIME
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