Concrete Journal
Online ISSN : 2186-2753
Print ISSN : 0387-1061
ISSN-L : 0387-1061
Search
Advanced search
OR
Browse
Search
Volume 51, Issue 12
Displaying 1-14 of 14 articles from this issue
Show all abstracts
    • |<
    • <
    • 1
    • >
    • >|
TOPICS
  • Revision of “Recommendation for Practice of High-Strength Concrete” by the Architectural Institute of Japan
    K. Ichise, A. Nishida, S. Kuroiwa, N. Onozato
    2013 Volume 51 Issue 12 Pages 953
    Published: 2013
    Released on J-STAGE: December 01, 2014
    DOIhttps://doi.org/10.3151/coj.51.953
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    The Architectural Institute of Japan published “Recommendation for Practice of High-Strength Concrete” in November 2013. Eight years have passed already since the first edition (January 2005), during which high-strength concrete related technology has made great advances, as attested by the fact that many constructions now exceed 80N/mm2 in design strength. Furthermore, various specifications, guidelines and JIS standards related to high-strength concrete have also been revised. The revision of “Recommendation for Practice of High-Strength Concrete” was carried out to achieve consistency with the above-mentioned advances and revisions. This paper gives an overview of this latest revision of “Recommendation for Practice of High-Strength Concrete”.
    View full abstract
    Download PDF (875K)
  • Development and Application of Slender Columns using Concrete with Design Strength of 300 MPa
    K. Imai, K. Yamamoto, M. Kato, A. Muramatsu
    2013 Volume 51 Issue 12 Pages 959-966
    Published: 2013
    Released on J-STAGE: December 01, 2014
    DOIhttps://doi.org/10.3151/coj.51.959
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Until now, ultra-high-strength concrete was developed with aims such as the construction of structures of high quality and high durability, the creation of more flexible space, and the rationalization of construction, and in the architecture field, it has been applied mainly for lower floor columns in super-high-rise condominiums. In the course of working to develop materials that can achieve even greater strength, the authors have focused on slender RC columns as members allowing effective application, conducting technical studies on various aspects of materials, structures, and fire resistance. This paper outlines the development and introduces the application of slender RC columns that use concrete with design strength of 300MPa.
    View full abstract
    Download PDF (3083K)
  • Influence of Fine Aggregate Properties on Judgment of Saturated Surface Dry Conditions
    A. Ueno, S. Sogoh
    2013 Volume 51 Issue 12 Pages 967-974
    Published: 2013
    Released on J-STAGE: December 01, 2014
    DOIhttps://doi.org/10.3151/coj.51.967
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    In recent years, aggregates have become increasingly varied, with a corresponding expansion of their range of properties, making the application of existing measurement methods increasingly difficult. Aggregate properties, including the density and water absorption rate of fine aggregate, are of great importance for concrete mix design. The Committee on Concreting Technologies established the Fine Aggregate Quality Working Group for the purpose of organizing density and water absorption coefficient measurement methods for fine aggregate, and based on their measurement principles, to investigate the properties of fine aggregate that make the application of these measurement methods difficult. This report summarizes the test results obtained as part of these activities and presents the differences in the results obtained from density and water absorption coefficient measurements of fine aggregates with a wide range of properties performed with methods that are based on differing measurement principles.
    View full abstract
    Download PDF (2400K)
  • Preliminary Investigation on Historic Concrete Revetment at Gunkan Island
    O. Kiyomiya, T. Habuchi, K. Sano, H. Naitou, T. Harada
    2013 Volume 51 Issue 12 Pages 975-983
    Published: 2013
    Released on J-STAGE: December 01, 2014
    DOIhttps://doi.org/10.3151/coj.51.975
    JOURNAL FREE ACCESS
    Show abstractHide abstract
    Gunkan Island (official name: Hashima) is an island with an outer perimeter of approximately 1.2km and is protected by a vertical concrete revetment. Gunkan Island features a number of important modern industrial heritage facilities and RC buildings, and for this reason it has been gaining attention as a cultural asset and touristic resource. This island was expanded six times since the Meiji Era, and the revetment is between 82 and 116 years old. Maintaining the revetment in a suitable state is important for preserving the island. This paper provides an overview of the revetment of Gunkan Island and describes the results of a durability survey and visual inspection of the revetment.
    View full abstract
    Download PDF (4733K)
    • |<
    • <
    • 1
    • >
    • >|
feedback
 Top