摘要
Fly ash is the most inexpensive cementitious material,and its presence in concrete has increased in recent years because it has become more durable and environmentally friendly.This study examines densified mixture concrete and the effect of fly ash quality on high-flow,high-strength concrete.Tests show that when the same mixture achieves identical flow standards(slump >250 mm;slump flow >600 mm),the fly ash quality affects the nature of the concrete;additionally,and adding Class F fly ash to concrete(loss on ignition=6%)is more workable than adding Class C fly ash(loss on ignition=3%).However,adding fly ash with a high loss on ignition(9%)to concrete requires a substantial increase in the mixing water and a dose of superplasticizer to achieve the required workability.This reduces the quality of the concrete,which subsequently deteriorates its safety and durability.
Fly ash is the most inexpensive cementitious material,and its presence in concrete has increased in recent years because it has become more durable and environmentally friendly.This study examines densified mixture concrete and the effect of fly ash quality on high-flow,high-strength concrete.Tests show that when the same mixture achieves identical flow standards（slump 250 mm;slump flow 600 mm）,the fly ash quality affects the nature of the concrete;additionally,and adding Class F fly ash to concrete（loss on ignition=6%）is more workable than adding Class C fly ash（loss on ignition=3%）.However,adding fly ash with a high loss on ignition（9%）to concrete requires a substantial increase in the mixing water and a dose of superplasticizer to achieve the required workability.This reduces the quality of the concrete,which subsequently deteriorates its safety and durability.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2012年第6期1074-1082,共9页
Journal of Shenyang Jianzhu University：Natural Science
基金
台湾科学委员会(NSC-98-0411)
