Desulfurized gypsum-based composites:synergistic optimization and performance of polyethylene fibers/sulphoaluminate cement
HAN Yu
TAN Yan
ZHOU Lijun
Abstract：This study synergistically incorporated polyethylene(PE)fibers and sulphoaluminate cement(SAC)into the FGD gypsum matrix.Response surface methodology(RSM)was employed to systematically analyze the effects of the water-to-binder ra-tio,PE fiber content,SAC content,and their interactions on the dry flexural strength and softening coefficient of the composite ma-terial.The optimal mix proportion was determined based on the established regression model.The results demonstrated that:the in-teraction between the water-to-binder ratio and SAC had the most significant impact on the softening coefficient;while the interac-tion between the dosage of PE fiber and the dosage of SAC most significantly influenced the dry flexural strength.The composite exhibited optimal comprehensive performance at a water-to-binder ratio of 0.35,PE fiber content of 1.1%,and SAC content of 11.6%.The relative errors between model-predicted values and experimentally measured values were all below 5%,confirming the model's reliability.The water-to-binder ratio modulated the matrix compactness;PE fibers effectively bridged cracks and enhanced matrix toughness;SAC incorporation promoted the formation of ettringite and optimized the pore structure.The synergistic effects of these factors significantly improved the macroscopic properties of materials.
Keywords：desulfurized gypsumPE fibersresponse surface methodologyinteractionproperties
Publication Date：2025-12-25
Online Publishing Date：2026-01-13(First online date of this platform, not the publication date of the document)
Pages：7( 7-13 )