혼화재 조합에 따른 UHPC의 기존연구 고찰 및 강도특성 평가

초록

Ultrahigh-performance concrete (UHPC) has higher cement and binder contents than normal-strength concrete for exhibiting high compressive strength. Research has been continuously conducted to reduce the amount of cement in UHPC and to confirm that fly ash and granulated blast-furnace slag (GBFS) can be employed as alternatives for cement without reducing the strength by up to 20% and 50%, respectively. Herein, changes in strength and fluidity were analyzed by replacing cement with fly ash and GBFS in the UHPC mix. The compressive strength of a fly ash– substituted specimen was the lowest, and a GBFS-substituted specimen showed a strength similar to that before substitution. Overall, the flexural strength of the GBFS and fly ash–substituted specimens were lower than before substition. However, their fluidity was higher, requiring less superplasticizers.

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