Concrete Journal
Online ISSN : 2186-2753
Print ISSN : 0387-1061
ISSN-L : 0387-1061
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Volume 27, Issue 5
Displaying 1-7 of 7 articles from this issue
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  • Developments in Concrete Pumping Method
    History of pump concreting method and effect of mixing proportion on squeeze pumping
    Torao Kemi
    1989 Volume 27 Issue 5 Pages 5-21
    Published: May 01, 1989
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.27.5_5
    JOURNAL FREE ACCESS
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    A quarter century has passed since pump concreting method was applied to concreting work, and now it is used in civil engineering as well as architecture. Although the method was used in early days in the condition that its effect on quality of concrete was not clear, the quality and the mixing proportion of concrete and the load after squeeze pumping have been clarified. It was used in various ways so that it has been stably fixed to concreting work. In this paper, the history of pump concreting method, the outline and utilization of pumping machine, the quality of concrete and the squeeze pumping performance are introduced including the effect of recent studies.
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  • State of the Art Report on Roller Compacted Concrete Pavements
    K. Kokubu, Y. Anzaki
    1989 Volume 27 Issue 5 Pages 22-30
    Published: May 01, 1989
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.27.5_22
    JOURNAL FREE ACCESS
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    Roller compacted concrete pavement was developed from cement stabilized materials and is compacted no-slump concrete with vibratory roller. This construction method is able to apply to concrete slab and subbase. Roller compacted concrete pavement does not flow and is able to open to traffic load just after compaction because of aggregate interlock. Many test pavements are constructing now in our country. State of the art and problems to be solved on roller compacted concrete pavements are summarized in this report.
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  • Applicability of Super Low-Heat Cement to Mass Concrete Structures
    K. Kanazawa, H. Ninomiya, S. Sogo, C. Shinkai
    1989 Volume 27 Issue 5 Pages 31-37
    Published: May 01, 1989
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.27.5_31
    JOURNAL FREE ACCESS
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    Super low-heat cement is effective in controlling thermal cracks in mass concrete structures. Therefore, eight kinds of super low-heat cement with substantial additions of pulverized blast-furnace slag and fly ash were trial-manufactured and their applicabilities to mass concrete structures were investigated through the properties of concretes using these cements. It was found that replacement further of fine aggregate with pulverized limestone produced a concrete which was plastic and exhibited low temperature rise to facilitate inhibition of thermal cracking of mass concrete structures.
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  • Crack-Control of Elements for Submerged Tunnels
    Tama River and Kawasaki Fairway Tunnels in Expressway Bay-shore Route
    S. Tezuka, S. Tomizawa
    1989 Volume 27 Issue 5 Pages 38-49
    Published: May 01, 1989
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.27.5_38
    JOURNAL FREE ACCESS
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    Tama River and Kawasaki Fairway tunnels in Expressway Bay-shore Route is constructed with submerged tunneling method. As for the elements of these tunnels, eleven of twenty-one elements are now being prefabricated in the dry-dock. This report presents the quality control and crack-control, such as mix proportion and pre-cooling of the concrete, in the prefabrication of the elements.
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  • Construction of the New Tenkawa-Benzaiten Shrine
    Use of Concrete containing Durability Improving Agent
    K. Yanagibashi, T. Saitoh, M. Sakuta, S. Shionaga, I. Tanaka
    1989 Volume 27 Issue 5 Pages 50-56
    Published: May 01, 1989
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.27.5_50
    JOURNAL FREE ACCESS
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    Tenkawa-Benzaiten is one of the most famous Benzaiten Shrine, which was originally built in Heian era. The whole structure of the shrine is now being renewed. The new shrine is designed as the original shape in the Heian era. The basement part of the shrine is designed as reinforced concrete and the other part as wood. Since wood has high durability as is shown by many Japanese old temples, the reinforced concrete used in the basement is required to have equivalent durability. For this purpose durability improve agent was used as concrete admixture. In addition, concrete construction was carried out very carefully in order to obtain dense cement hydration product.
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  • [title in Japanese]
    [in Japanese], [in Japanese]
    1989 Volume 27 Issue 5 Pages 74-76
    Published: May 01, 1989
    Released on J-STAGE: April 26, 2013
    DOIhttps://doi.org/10.3151/coj1975.27.5_74
    JOURNAL FREE ACCESS
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  • [title in Japanese]
    1989 Volume 27 Issue 5 Pages 30
    Published: 1989
    Released on J-STAGE: February 07, 2014
    DOIhttps://doi.org/10.3151/coj1975.27.5_30
    JOURNAL FREE ACCESS
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    [in Japanese]
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