Effect of defoamer on porosity and strength of phosphogypsum-based building plaster
Adding additives is the main way to improve the performance of building plaster.In this paper,the effects of sili-cone defoamer and polyether modified silicone defoamer on the porosity,strength,softening coefficient and water absorption of phos-phogypsum-based building plaster hardened body were also studied,and its influence mechanism was analyzed from the microscopic point of view.The results showed that the silicone defoamer had retarding effect on phosphogypsum-based building plaster paste when the content was 0～1.50％,the initial setting time increased from 4 min to 8 min and the final setting time increased from 9 min to 17 min.Silicone defoaming agent with 0 to 0.50％or polyether modified silicone defoaming agent with 0 to 1.50％can im-prove the strengths of phosphogypsum-based building plaster hardened body.Polyether modified silicone defoaming agent is better for improving the performance of phosphogypsum-based building plaster.
building plasterdefoamerporositystrengthperformance optimization
万方数据
维普
