A trial construction of high durability railway viaducts with local aggregates
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Détails bibliographiques
Auteur(s): |
Kotaro Kawamura
(East Japan Railway Company)
Joe Takemura (East Japan Railway Company) Shigenobu Iguchi (East Japan Railway Company) Tsutomu Yoshida (East Japan Railway Company) Masashi Kobayashi (East Japan Railway Company) |
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Médium: | papier de conférence | ||||
Langue(s): | anglais | ||||
Conférence: | IABSE Congress: The Evolving Metropolis, New York, NY, USA, 4-6 September 2019 | ||||
Publié dans: | The Evolving Metropolis | ||||
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Page(s): | 1917-1921 | ||||
Nombre total de pages (du PDF): | 5 | ||||
DOI: | 10.2749/newyork.2019.1917 | ||||
Abstrait: |
We are carrying out a construction project of new railroad viaducts. These new railroad viaducts are constructing using about 110,000 m³volume concrete. In this construction place, it is difficult for us to get low ASR-reactive aggregates and it is expected to be supplied with snowmelt water on the viaducts in winter. Then we tested ASR-reactive these local aggregates and found an effective mixed ratio of fly-ash is 20% of cement. On the other hand, various side effects were also expected by using fly-ash. For example, initial cracking due to contraction, early strength concrete, bleeding, etc. Therefore, we repeated various tests and examined and carried out a method that could ensure the same construction method and quality as when using ordinary Portland cement, even with fly-ash. Also, we adopted a structure that is unlikely to be affected by rainwater as a structural measure. For example, the entire adoption of a ramen type viaduct that has eliminated bearings, adoption of FRP sound barrier, etc. Then we made it possible to build highly durable railway viaducts by these various measures of materials and structures. |