Effect of defoamer on porosity and strength of phosphogypsum-based building plaster
SI Pengchao
XUE Kaixi
CHU Yixin
HU Yanxiang
WANG Shengfu
YANG Yehao
Abstract：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.
Keywords：building plasterdefoamerporositystrengthperformance optimization
Publication Date：2024-05-25
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 7-12 )