A study of drying shrinkage for securing durability of PC bridges

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

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 journal › Conference 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 language	English
Article number	e446
Journal	Sustainable Construction Materials and Technologies
Volume	2013-August
Publication status	Published - Jan 1 2013
Event	3rd International Conference on Sustainable Construction Materials and Technologies, SCMT 2013 - Kyoto, Japan Duration: Aug 18 2013 → Aug 21 2013

ASJC Scopus subject areas

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

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title = "A study of drying shrinkage for securing durability of PC bridges",

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.",

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T1 - A study of drying shrinkage for securing durability of PC bridges

AU - Kawanaka, Ryoichi

AU - Kobayashi, Hitoshi

AU - Sakimoto, Tsutomu

AU - Ayano, Toshiki

AU - Miyagawa, Toyo

PY - 2013/1/1

Y1 - 2013/1/1

N2 - 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.

AB - 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.

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VL - 2013-August

JO - Sustainable Construction Materials and Technologies

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