Concrete Journal
Online ISSN : 2186-2753
Print ISSN : 0387-1061
ISSN-L : 0387-1061
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Volume 17, Issue 2
Displaying 1-6 of 6 articles from this issue
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  • Seeds and Needs in Regard to Cement Chemistry
    Renichi Kondo
    1979 Volume 17 Issue 2 Pages 1-11
    Published: February 15, 1979
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.17.2_1
    JOURNAL FREE ACCESS
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    This paper deals with the seeds which have been found in the cement chemistry concerned with our laboratory and may fit for severe needs from up to date concrete technology. General portland cement would change in near future to the blended type which contains rather much slag and or gypsum or other components. Portland cement clinker can be obtained with consumption of only half fuel by the use of slags instead of clay as main raw material. Ultra high early and ultimate strength alite cement would be produced by partial reduction of steel slag, accompaning with by-products of high value such as magnesium, vanadium, phosphatic fertilizer and high quality steel. Extra high strength material can surely be made by the carbonation of steel slag. On the other hand, studies are caning out in other laboratories too to get such cements suitable for the wells of ultra deep oil, high preasure natural gas and high temperature geothermal and also to withstand to the accident of nuclear reactor.
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  • Concrete Work for the Main Office Building of the Bank of Tokyo
    Kenichi Tanabe, Masahiro Morozumi
    1979 Volume 17 Issue 2 Pages 12-19
    Published: February 15, 1979
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.17.2_12
    JOURNAL FREE ACCESS
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    Described is the record of concrete works at the constrction of the main office building of the Bank of Tokyo. Emphasis is put on such relatively important and interesting feature, as,
    1) Concrete works under the ground, and
    2) The construction management for the works of exterior precat concrete walls with built in stone. For the feature 1)
    Crack prevention measure is described in details especially for the concrete placed during the winter
    M=nΣi=1(0.067Tn+0.67) (D°D)
    σn=183logM (kg/cm2)
    For the feature 2)
    The quality contral in the precast concrete plant and the related problems and corresponding measures are discussed.
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  • [title in Japanese]
    [in Japanese]
    1979 Volume 17 Issue 2 Pages 50-51
    Published: February 15, 1979
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.17.2_50
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1979 Volume 17 Issue 2 Pages 64-71
    Published: February 15, 1979
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.17.2_64
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese]
    1979 Volume 17 Issue 2 Pages 87-90
    Published: February 15, 1979
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.17.2_87
    JOURNAL FREE ACCESS
    Download PDF (510K)
  • [title in Japanese]
    1979 Volume 17 Issue 2 Pages 49
    Published: 1979
    Released on J-STAGE: February 07, 2014
    DOIhttps://doi.org/10.3151/coj1975.17.2_49
    JOURNAL FREE ACCESS
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    [in Japanese]
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