A study of drying shrinkage for securing durability of PC bridges

Ryoichi Kawanaka, Hitoshi Kobayashi, Tsutomu Sakimoto, Toshiki Ayano, Toyo Miyagawa

Research output: Contribution to journalConference article

Abstract

Recently, cracks have been found in a few prestressed concrete (PC) structures at early ages in Japan and it was determined that the cracks were caused by large drying shrinkage of concrete. In the current design standards, the relationship between the shrinkage strain of actual structures and that of small test specimens obtained by the Japanese Industrial Standards (JIS) test method has not been clarified. Therefore, large test specimens whose sizes are the same as actual PC box girders were constructed and the drying shrinkage strain was measured over an extended period of time. These measurements provided an understanding of what happens in the actual structures, and a clue to solve the problem due to large drying shrinkage strain was gained. In addition, the validity of the measurements was verified by the analysis based on the moisture diffusion in concrete.

Original languageEnglish
Article numbere446
JournalSustainable Construction Materials and Technologies
Volume2013-August
Publication statusPublished - Jan 1 2013
Event3rd International Conference on Sustainable Construction Materials and Technologies, SCMT 2013 - Kyoto, Japan
Duration: Aug 18 2013Aug 21 2013

ASJC Scopus subject areas

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

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