矿产综合利用2024，Vol.45Issue(4)：182-189,8.DOI:10.3969/j.issn.1000-6532.2024.04.027
碱激发矿渣粉煤灰地质聚合物力学性能改性及其混凝土性能
Mechanical Property Modification of Alkali-activated Slag Fly Ash-based Geopolymer and its Concrete Property
摘要
Abstract
This is an article in the field of ceramics and composites.Alkali-activated Slag-fly Ash-based Geopolymer(ASFG)has excellent properties such as high early strength,acid and alkali resistance,but its large brittleness and poor toughness affect its popularization and application.In order to improve the properties of ASFG and broaden the types of mineral admixtures that can be used for ASFG modification,six kinds of mineral admixtures,including metakaolin,zeolite powder,bentonite,wollastonite powder,light calcium carbonate and silica fume,are used as modified materials,and their modification effects on ASFG are studied.The optimum modified material is silica fume.In order to further explore the improvement effect of silica fume on the mechanical properties of ASFG,the effect of the content of silica fume on the mechanical properties of ASFG is studied,and the optimal content of silica fume is determined.Finally,Alkali-activated Slag-fly Ash-silica Fume-based Geopolymer Concrete(ASFSGC)is prepared,and its workability,quasi-static mechanical properties and impermeability are studied.The results show that bentonite,wollastonite powder,light calcium carbonate and silica fume can significantly improve the flexural strength of ASFG.Wollastonite powder and silica fume can significantly improve the compressive strength of ASFG.For ASFG,silica fume is a premium mineral admixture.With the increase of silica fume content,the mechanical properties of ASFG first increase and then decrease,and the optimal content of silica fume is 4％.ASFSGC has good workability and excellent impermeability,and the ductility of ASFSGC is 14.1％larger than that of ordinary Portland cement concrete.关键词
陶瓷及复合材料/碱激发矿渣粉煤灰/地质聚合物/混凝土/矿物掺合料/硅灰Key words
Ceramics and composites/Alkali-activated slag-fly ash/Geopolymer/Concrete/Mineral admixtures/Silica fume分类
矿业与冶金引用本文复制引用
马维,何兆益..碱激发矿渣粉煤灰地质聚合物力学性能改性及其混凝土性能[J].矿产综合利用,2024,45(4):182-189,8.基金项目
国家自然科学基金(51978116) （51978116）
四川省教育厅项目(18ZB0307) （18ZB0307）
