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Predecessor
Volume 38, Issue 12
Displaying 1-7 of 7 articles from this issue
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J. Niwa, T. Okamoto, S. Maehori2000 Volume 38 Issue 12 Pages 3-9
Published: December 01, 2000
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe new artificial lightweight aggregates, which have both higher strength and lower water absorption than the ordinary lightweight aggregates, have been developed recently. Super lightweight concrete using this aggregate can obtain lightweight, higher compressive strength, greater durability and easier handling than those of conventional lightweight concrete. This report summarizes the basic properties of the super lightweight aggregates and fundamental mechanical properties of the super lightweight concrete such as ultimate flexural, shear and fatigue strengths. Furthermore, the application to structural members of the super lightweight concrete and the committee activities about lightweight concrete are introduced in this report.View full abstractDownload PDF (6151K) -
H. Mutsuyoshi2000 Volume 38 Issue 12 Pages 10-16
Published: December 01, 2000
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSNew types of external prestressed concrete bridge with large eccentricity have been recently developed. They are called extradosed PC bridge, PC bridge with subtended stay cables, self-anchored suspended bridge and external PC truss bridge with large eccentricity. Some actual bridges mentioned above have been already erected. This paper describes the basic concept and features of such bridges and introduces some actual bridges.View full abstractDownload PDF (14548K) -
K. Fukudome, T. Suzuki, E. Saitoh, S. Nagataki2000 Volume 38 Issue 12 Pages 17-22
Published: December 01, 2000
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe development of fishing grounds has been proceeding by creating artificially up-welling currents through the construction of large sea mounds. While the creation of artificial upwelling currents requires large sea mound, use of fly ash has been studied from a viewpoint of effective resource utilization. Such studies have resulted in the development of high Volume Fly-Ash Concrete using a large amount of fly ash. This paper describes the High Volume Fly-Ash Concrete and the development of Mounds Coastal Fishing Grounds.View full abstractDownload PDF (7024K) -
Y. Matsuda, T. Kakio2000 Volume 38 Issue 12 Pages 23-31
Published: December 01, 2000
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSThe San-yo Shinkansen has been playing an important role as an artery in Japan, since starting its operation in 1975. In this paper, introducing the present condition of concrete structures in the San-yo Shinkansen, appropriate methods to maintain the structures are examined.
Our inspection results showed that the carbonation mainly caused the deterioration of the reinforced concrete structures. In addition, it was shown that the more the amount of chloride ion increased, the more the corrosion of rebar progressed. The strength of deteriorated viaducts is satisfied with the design strength under current condition, which means structurally safe. However appropriate maintenance and research and development are necessary to keep the San-yo Shinkansen good condition.View full abstractDownload PDF (9204K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]2000 Volume 38 Issue 12 Pages 33-37
Published: December 01, 2000
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (3118K) -
[in Japanese], [in Japanese], [in Japanese], [in Japanese]2000 Volume 38 Issue 12 Pages 38-43
Published: December 01, 2000
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (9570K) -
[in Japanese], [in Japanese]2000 Volume 38 Issue 12 Pages 44-50
Published: December 01, 2000
Released on J-STAGE: April 26, 2013
JOURNAL FREE ACCESSDownload PDF (10189K)
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