Concrete Journal
Online ISSN : 2186-2753
Print ISSN : 0387-1061
ISSN-L : 0387-1061
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Volume 49, Issue 4
Displaying 1-15 of 15 articles from this issue
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  • Standard of the Japanese Society for Non-Destructive Inspection (NDIS) for Investigating Location of Reinforcing Bars by Radar and Electromagnetic Induction
    Y. Masuda, K. Morihama, H. Hamasaki
    2011 Volume 49 Issue 4 Pages 4_15-4_21
    Published: 2011
    Released on J-STAGE: March 27, 2012
    DOIhttps://doi.org/10.3151/coj.49.4_15
    JOURNAL FREE ACCESS
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    Recently, nondestructive test is adopted for inspection of arrangement of reinforcement of RC structure, but the test method was not standardized. This report explains the two standard concerning investigation of reinforcement in concrete established by Japanese Society for Non-Destructive Inspection (JSNDI). NDIS 3429 is the method by using electromagnetic radar, and NDIS 3430 is the method by using electromagnetic induction.
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  • Construction of the Link Slab for PC Girders using Fiber Reinforced Cementitious Composite
    H. Taniguchi, Y. Taira, K. Muroda, T. Oshiro
    2011 Volume 49 Issue 4 Pages 4_22-4_29
    Published: 2011
    Released on J-STAGE: March 27, 2012
    DOIhttps://doi.org/10.3151/coj.49.4_22
    JOURNAL FREE ACCESS
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    This report describes the material and structural feature of the link slab for prestressed concrete girders using new type of fiber reinforced cementitious composite. Modulus of elasticity of the material is lower than that of usual concrete, and the toughness is higher. Even if the deformation of the slab used with the material grows, the minute cracks are expected to well-distribute in the slab. Making the bridge continuous becomes possible by developed method.
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  • For Establishment of Porous Concrete Construction Standard
    S. Hatanaka, N. Mishima, H. Morihana, T. Nakagawa
    2011 Volume 49 Issue 4 Pages 4_30-4_37
    Published: 2011
    Released on J-STAGE: March 27, 2012
    DOIhttps://doi.org/10.3151/coj.49.4_30
    JOURNAL FREE ACCESS
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    Porous concrete (POC) or pervious concrete is a special concrete consisting of coarse aggregate and cementing matrix (paste or mortar) with intentionally incorporated continuous voids. The POC provides high environmental performance in terms of water permeability/drainage, water retention, water pumping, air permeability, sound absorbency, tolerance to the presence of plants and other organisms, etc. Recently, application of the POC is gradually increased in the actual construction. The former technical committee of porous concrete in JCI has already published a draft of design and construction code in 2003. Since further information has been gained afterwards, it is considered the high time to review the draft and revise the document. In this technical report, a few parts of the earlier draft code is revised and added with new findings, spotlighting quality control and compaction method which are quite important for the actual application of the POC, mainly based on the author's research reports.
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