沈阳大学学报（自然科学版）2026，Vol.38Issue(4)：324-332,9.
硫酸钙晶须与高性能膨胀剂制备水泥砂浆性能试验
Performance Test of Cement Mortar Prepared with Calcium Sulfate Whisker and High-Performance Expansive Agent
摘要
Abstract
Cement-based materials were prepared using calcium sulfate whisker and high-performance expansive agent,and the interaction mechanism and compatibility among the calcium sulfate whisker,the expansive agent,and cement were analyzed by means of XRD and SEM.Meanwhile,mortar specimens were prepared and tested for workability,pore structure,mechanical properties,and deformation behavior.The test results indicated that the compatibility among calcium sulfate whisker,high-performance expansive agent,and cement was good.The high-performance expansive agent promoted the formation of cement hydration products,and the C-S-H gel generated from hydration covered the surface of calcium sulfate whiskers.When the mass fraction of the high-performance expansive agent was 6％,the diffraction peak intensities of calcium hydroxide and ettringite crystals in the cement-based hydration products were the strongest.The combined addition of these two materials in mortar achieved complementary advantages.The calcium sulfate whisker controlled early-age cracking of cement mortar,while the incorporation of the high-performance expansive agent refined the internal pore size,reduced the porosity,and significantly increased both the free expansion rate and the restrained expansion rate,effectively compensating for mortar shrinkage.Based on comprehensive evaluation of pore characteristics,mechanical properties,and deformation performance,the optimum performance of the shrinkage-compensating mortar was obtained with 6％high-performance expansive agent and 5％calcium sulfate whisker by mass.关键词
硫酸钙晶须/膨胀剂/孔隙结构/力学性能/变形性能Key words
calcium sulfate whisker/expansive agent/pore structure/mechanical properties/deformation properties分类
建筑与水利引用本文复制引用
黄伟,张阳阳,徐桂丽,葛进进..硫酸钙晶须与高性能膨胀剂制备水泥砂浆性能试验[J].沈阳大学学报（自然科学版）,2026,38(4):324-332,9.基金项目
安徽省高校学科拔尖人才学术资助项目(gxbj2022111) （gxbj2022111）
安徽省教育厅科学研究重点资助项目(2022AH052930) （2022AH052930）
安徽省中青年教师培养行动优秀青年教师培育项目(YQYB2023128). （YQYB2023128）
