Concrete Journal
Online ISSN : 2186-2753
Print ISSN : 0387-1061
ISSN-L : 0387-1061
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Volume 26, Issue 12
Displaying 1-5 of 5 articles from this issue
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  • Thermal Properties of Concrete and Their Measuring Methods
    Hiroshi Tokuda
    1988 Volume 26 Issue 12 Pages 5-12
    Published: December 01, 1988
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.26.12_5
    JOURNAL FREE ACCESS
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    Stabilizing concrete structures thermally and volumetrically is of prime importance. The knowledges of thermal properties are applied to predicting and analyzing thermal behavior of all types of structures. The basic quantities involved in the properties are adiabatic temperature rise, thermal diffusivity, thermal conductivity, specific heat and coefficient of thermal expansion. Measuring or estimating method of the properties, effects of materials used, mix proportion, measuring method and conditions on the properties and control of the properties from the viewpoint of checking thermal cracking are described.
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  • A Short Term Construction of Large Buildings by Site-Precast Concrete
    The Case of Nikke Community Center
    H. Saiga, H. Takano, S. Nakamura, K. Horikawa, I. Haba
    1988 Volume 26 Issue 12 Pages 13-21
    Published: December 01, 1988
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.26.12_13
    JOURNAL FREE ACCESS
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    The construction of Nikke Comunity Center, a large building for shopping with a total floor area of more than 85 000 m2, was required to be completed within only 11.5 months. It was estimated that the conventional cast-in-site concrete construction would need 19 months. The construction, however, was completed as required, adopting the “REQUEST constructing system” which consisted of a framed structure of site-precast concrete such as columns, beams, and stairs, and prefabricated deck-plate forms. This report describes the construction in details.
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  • Construction of Mass Concrete and Winter Concreting on Foundation of Bridge
    Spread Foundation with Pneumatic Caisson Method in New Tokachi Bridge
    T. Kowatari, H Ishikawa, T. Tanno, K. Madokoro
    1988 Volume 26 Issue 12 Pages 22-29
    Published: December 01, 1988
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.26.12_22
    JOURNAL FREE ACCESS
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    New Tokachi Bridge is a large 755 m long bridge over the Tokachi River. Because it is built with continuous PC box beams with different cross section in the main spans which are the maximum 170 m, the substructures use the spread foundations with pneumatic-caisson method to support the load of the superstructure. The footing of the fixed pier requires a huge amount of concrete (4 556 m3), making it necessary to deal with the problems of the mass concrete. Additionally the pier was constructed in the coldest period of the year with daily minimum temperatures of about -30°C, and required measures for winter concreting. This report present on outline of the cracking control for the pier construction, and the considerations for measured temperatures, cracks and so on.
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  • [title in Japanese]
    [in Japanese]
    1988 Volume 26 Issue 12 Pages 70-74
    Published: December 01, 1988
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.26.12_70
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1988 Volume 26 Issue 12 Pages 95-105
    Published: December 01, 1988
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.26.12_95
    JOURNAL FREE ACCESS
    Download PDF (1430K)
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