硅酸盐通报2024，Vol.43Issue(5)：1812-1821,10.
再生微粉多元复合胶凝体系的性能研究
Properties of Multi-Component Composite Cementitious System of Regenerated Micropowder
摘要
Abstract
Composite cementitious system of regenerated micropowder is beneficial for the application of regenerated micropowder.A binary/ternary cementitious composite system was constructed by using regenerated micropowder-Portland cement-fly ash.The effect of regenerated micropowder content on physical and mechanical properties of mortar test block was studied,and the hydration products and microstructure of mortar test block were investigated by XRD and SEM.The results show that with the increase of regenerated micropowder content,the compressive strength of test block at 3,7 and 28 d decreases,the water demand increases,the fluidity decreases,and the dry shrinkage decreases first and then increases.The drying shrinkage of composite cementitious system mortar test block mixed with regenerated micropowder and fly ash developes rapidly within 7～14 d.With the increase of regenerated micropowder and fly ash content,formation of C-S-H decreases gradually,and the internal pores and cracks of mortar test block increases significantly.The maximum total substitution rate of regenerated micropowder and fly ash to cement is 40％(mass fraction).关键词
再生微粉/碱激发/复合胶凝体系/力学性能/水化产物/干燥收缩Key words
regenerated micropowder/alkali activation/composite cementitious system/mechanical property/hydration product/drying shrinkage分类
建筑与水利引用本文复制引用
裴军军,苑博文,高敏,郭启龙,林政红,黑亚萌..再生微粉多元复合胶凝体系的性能研究[J].硅酸盐通报,2024,43(5):1812-1821,10.基金项目
甘肃省自然科学基金(20JR5RA510) （20JR5RA510）
西北民族大学引进人才项目(Z14013) （Z14013）
中央高校基本科研业务项目(31920230028) （31920230028）
