The compressive strength,hydration products and microstructure of concrete with calcium-enriched fly ash(CEFA) at different temperature were investigated.The result indicates that the hydration products age of 7 d at-...The compressive strength,hydration products and microstructure of concrete with calcium-enriched fly ash(CEFA) at different temperature were investigated.The result indicates that the hydration products age of 7 d at-15 ℃ are mainly ettringite and C-S-H,and fly ash particles remain original state.Standard curing was adapted after 7 d curing at-15 ℃.At the age of 35 d,C-S-H was found on the surface of fly ash particles.The hydration product of CEFA is mainly C-S-H gel,which can densify the microstructure of concrete.展开更多
文摘The compressive strength,hydration products and microstructure of concrete with calcium-enriched fly ash(CEFA) at different temperature were investigated.The result indicates that the hydration products age of 7 d at-15 ℃ are mainly ettringite and C-S-H,and fly ash particles remain original state.Standard curing was adapted after 7 d curing at-15 ℃.At the age of 35 d,C-S-H was found on the surface of fly ash particles.The hydration product of CEFA is mainly C-S-H gel,which can densify the microstructure of concrete.
