Concrete Journal
Online ISSN : 2186-2753
Print ISSN : 0387-1061
ISSN-L : 0387-1061
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Volume 39, Issue 8
Displaying 1-7 of 7 articles from this issue
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  • Safety Measures of Concrete Structures using Composite Materials Prevention for Falling Concrete Pieces
    M. Mizoe, K. Kubota, R. Kubo, S. Nojima
    2001 Volume 39 Issue 8 Pages 5-9
    Published: August 01, 2001
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.39.8_5
    JOURNAL FREE ACCESS
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    Cracks, spalls and fall of concrete pieces due to premature deterioration of concrete structures have recently made a social issue. Falling concrete pieces on in-service road may result in the public disaster. Japan Highway Public Corporation published the Handbook for Preventing Methods of Falling Concrete in November 2000. This Handbook can be applied for to concrete structures except for tunnel structures. This paper explains the background of he issue, concept of the handbook, inspection method for deteriorated concrete structures, and required performance to prevent falling pieces of concrete.
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  • Out Line of a Guidebook on River Revetment Methods Used Porous Concrete
    M. Tamai
    2001 Volume 39 Issue 8 Pages 10-15
    Published: August 01, 2001
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.39.8_10
    JOURNAL FREE ACCESS
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    When porous concrete is applied to the river revetment, the erosion protective function can be ensured to the embankment. The application of the porous concrete to the embankment is also regarded as one of the multinatural river methods. Plants are directly vegetated onto porous concrete, and both microorganism and small animals can live in those voids, when it is applied to the low-water level revetment. Henceforth, the harmonic ecosystem is formed in it, and indirect purification of water quality due to the system can be expected. The Advanced Construction Technology Center has organized the review board on the river revetment method with porous concrete since 1997. The board has made an investigation on 62 practical cases of river revetment to which porous concrete is applied by the Ministry of Construction. The final report of the investigation is published as a guidebook on river revetment methods with porous concrete in April, 2001. Outline of the guidebook is briefly described in this paper.
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  • Development of Initial Defect-free High Performance Concrete
    A. Hori, T. Andou, Y. Otabe, Y. Suzuki
    2001 Volume 39 Issue 8 Pages 16-21
    Published: August 01, 2001
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.39.8_16
    JOURNAL FREE ACCESS
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    Since high strength and high flowable concrete is usually prepared at so low water/binder ratio and it contains high amount of powder, autogenous shrinkage and hydration heat are tend to be increased. For taking measure to this problem, in this study, high strength and high flowable concrete prepared adding both of expansive additive and shrinkagereducing agent was made. The physical properties of the concrete were examined and the resistance to be cracking was also confirmed.
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    2001 Volume 39 Issue 8 Pages 23-28
    Published: August 01, 2001
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.39.8_23
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    2001 Volume 39 Issue 8 Pages 29-35
    Published: August 01, 2001
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.39.8_29
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese]
    2001 Volume 39 Issue 8 Pages 36-40
    Published: August 01, 2001
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.39.8_36
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    [in Japanese], [in Japanese], [in Japanese], [in Japanese]
    2001 Volume 39 Issue 8 Pages 41-48
    Published: August 01, 2001
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.39.8_41
    JOURNAL FREE ACCESS
    Download PDF (30155K)
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