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Volume 33, Issue 9
Displaying 1-5 of 5 articles from this issue
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Hiroshi Uchikawa1995 Volume 33 Issue 9 Pages 5-17
Published: September 01, 1995
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSTransition zone which is formed at interface between cement paste and aggregate in specified condition affects decisively on the property of hardened concrete. Transition zone in ordinary concrete consists mainly of considerably porous three dimensional network structure of calcium hydroxide crystal with the pore from 50 nm to 2 μm in diameter. Its thickness is usually 30 to 40 μm. The structure of transition zone is closely related to the condition of concrete manufacturing including composition and structure of material, mix proportion and curing condition. The change of concrete property by the formation of transition zone and the measure to depress the formation of transition zone which causes the deterioration of concrete quality are also described.View full abstractDownload PDF (11861K) -
Hiroshi Watanabe, Hirotaka Kawano1995 Volume 33 Issue 9 Pages 19-28
Published: September 01, 1995
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSAs rationalization of maintenance of concrete structures increases its importance, it is demanded to establish advanced diagnosis techniques for concrete structures. This paper has pointed out from analysis on repaired structures that proper timing is very important for effective repair and non destructive diagnosis is indispensable for evaluating the necessity of repair. Then it discusses on the problems, for example mechanical errors, when we use non destructive diagnosis techniques to evaluate such as corrosion of reinforcing steel and crack depth.View full abstractDownload PDF (1499K) -
K. Kuroha, S. Namiki, S. Kasai, T. Kobayashi1995 Volume 33 Issue 9 Pages 29-39
Published: September 01, 1995
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSHigh-strength concrete with specific design strength of 60 MPa and high-strength reinforcing bars, SD 490, were utilized in construction of 39-story buildings. The building was constructed with a RC layered construction system, in which both precast concrete members and cast-in-place reinforced concrete members were properly employed, and labor saving, high efficiency and high quality structures were attained. An outline of the structural plan and the RC layered construction system was presented, and prefabrication and splicing method of high-strength bars and proportioning design, placing method and results of quality control of high-strength concrete were reported.View full abstractDownload PDF (2416K) -
H. Umeda, T. Ogihara, T. Sano, H. Yaginuma1995 Volume 33 Issue 9 Pages 41-48
Published: September 01, 1995
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSContainer terminal construction in Higashi-ogishima Area of Kawasaki-shi is carried on aiming to open in April, 1996. It has been decided that interlocking blocks are going to be adopted as the paving material for this container terminal. Unfortunately though, since there are few application examples to port areas in Japan as compared to other countries, a riding test by 32-ton dump trucks was carried out to verify appropriateness of the design method and to evaluate durability of heavy duty pavements. Moreover, in order to improve efficiency and laborsaving of construction, mechanical laying was introduced and its effect has been confirmed. This paper covers applicability of interlocking block pavement to heavy duty pavement areas and mechanical laying.View full abstractDownload PDF (2334K) -
[in Japanese]1995 Volume 33 Issue 9 Pages 65-67
Published: September 01, 1995
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (768K)
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