Properties of Steam-Cured Fly Ash Concrete Using Porous Ceramic Waste Aggregate

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Title: Properties of Steam-Cured Fly Ash Concrete Using Porous Ceramic Waste Aggregate

Author(s): Phuong Trinh Bui, Yuko Ogawa, Naoki Doi, Kenji Kawai, and Ryoichi Sato

Publication: Special Publication

Volume: 303

Issue:

Appears on pages(s): 323-336

Keywords: porous ceramic waste aggregate; fly ash; steam curing; compressive strength; pore structure; autogenous shrinkage; carbonation resistance

Date: 6/1/2015

Abstract:
In the present study, the effects of porous ceramic waste aggregate (PCWA) on the mechanical properties and durability of the steam-cured fly ash concrete are investigated. The replacement ratios of fly ash were 0%, 20% and 40% by mass, and those of PCWA were 0%, 10% and 20% by volume. Three kinds of curing conditions: dried after steam curing (D-Steam), sealed after steam curing (S-Steam), and sealed curing (Sealed), were used. The experimental results show that the compressive strength of the fly ash concrete with 20% replacement of PCWA increased regardless of curing conditions, and the pore volume decreased. The autogenous shrinkage of the S-Steam cured fly ash concrete was reduced significantly by using 20% replacement of PCWA. The carbonation resistance of the D-Steam cured fly ash concrete was also improved by using 10% replacement of PCWA and 40% replacement of fly ash.