Mechanical property evolution during autoclaving process of aerated concrete using slag: II, Fracture toughness and microstructure

Norifumi Isu, Satoshi Teramura, Hideki Ishida, Takeshi Mitsuda

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

The mechanical properties were investigated for autoclaved aerated concrete (AAC) block samples, prepared using blast furnace slag at 180 °C under saturated steam pressures for various times from 1 to 128 h. The mechanical properties of AAC made using slag are comparable to those made without slag. With increased autoclaving time, the compressive strength increases due to the binder effect of the 1.1-nm tobermorite. In contrast, the fracture energy GF and resistance to crack growth decrease with increase of autoclaving time. This dependency is caused by the formation of voids around unreacted slag particles.

Original languageEnglish
Pages (from-to)2093-2096
Number of pages4
JournalJournal of the American Ceramic Society
Volume77
Issue number8
Publication statusPublished - 1994 Aug

ASJC Scopus subject areas

  • Ceramics and Composites

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