Concrete Journal
Online ISSN : 2186-2753
Print ISSN : 0387-1061
ISSN-L : 0387-1061
Volume 56, Issue 8
Displaying 1-14 of 14 articles from this issue
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  • T. Miyagawa, J. Niwa, T. Shimomura, S. Inoue, T. Watanabe, K. Takewaka ...
    2018 Volume 56 Issue 8 Pages 627-633
    Published: 2018
    Released on J-STAGE: August 01, 2019
    JOURNAL FREE ACCESS

    The Standard Specifications for Concrete Structures of the Japan Society of Civil Engineers, which are the main technical standards for the design and construction of concrete structures in the field of civil engineering in Japan, have been revised for the first time in five years. This paper gives an outline of the [Design] and the [Materials & Construction] editions which were published in March 2018. Besides incorporating technical advances, these revised editions aim to promote deeper coordination among the stages of design, construction and maintenance to promote smoother execution in practice, and more effective handling of issues that involve two or more of these stages. Further, content related to precast concrete, which contributes to higher construction productivity, has been enhanced, and lessons learned from disasters and accidents including the Great East Japan Earthquake are also incorporated.

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  • J. Yamasaki, Y. Hirofuji, K. Yamaji, T. Iwashimizu
    2018 Volume 56 Issue 8 Pages 634-640
    Published: 2018
    Released on J-STAGE: August 01, 2019
    JOURNAL FREE ACCESS

    In recent years, various thermal and heat insulation measures, such as heat shielding and heat insulation measures, have been devised for agitator truck drums, but objective verification of the effectiveness of these measures has not been carried out so far. To contribute to ensuring the quality in concrete construction in hot weather, we studied various factors affecting the temperature of fresh concrete, such as solar radiation, outside temperature, and concrete temperature at loading, as well as the effects of various thermal and heat insulation measures, by carrying out basic experiments using water and examining the concrete temperature in drums during hot weather at eight domestic sites by using the continuous measurement data yielded by probes.

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