Bond behaviour of deformed bars embedded in RAC

H. B. Choi, Kyung In Kang

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

To investigate the bond behaviour between recycled aggregate concrete (RAC) and rebar, this paper considers recycled aggregates (RAs) (RG of grade I and III and RS of grade II), w/c ratios (40% and 50%), and replacement ratios of RAs (0%, 30%, 50% and 100%). The results were as follows: (a) bond stress-slip shows tendencies like those of normal concrete up to a replacement ratio of 50%; (b) shearing stress-strain is influenced by grade and the replacement ratio of RAs; (c) τ b is influenced by grade and the replacement ratio of RAs, but at high w/c, τ b is not influenced by the quality and the replacement ratio of RAs; (d) τ b/√f ck is influenced by the w/c ratio; and (e) Tb between RAC and rebar is overestimated or underestimated by existing equations. As a result, a new equation (with modification of either the β value, invariable value or others), or modified development length or lap splice length must be considered.

Original languageEnglish
Pages (from-to)399-410
Number of pages12
JournalMagazine of Concrete Research
Volume60
Issue number6
DOIs
Publication statusPublished - 2008 Aug 1

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Building and Construction
  • Materials Science(all)

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