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A trial construction of high durability railway viaducts with local aggregates

A trial construction of high durability railway viaducts with local aggregates
Author(s): , , , ,
Presented at IABSE Congress: The Evolving Metropolis, New York, NY, USA, 4-6 September 2019, published in , pp. 1917-1921
DOI: 10.2749/newyork.2019.1917
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We are carrying out a construction project of new railroad viaducts. These new railroad viaducts are constructing using about 110,000 mĀ³volume concrete. In this construction place, it is difficult ...
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Bibliographic Details

Author(s): (East Japan Railway Company)
(East Japan Railway Company)
(East Japan Railway Company)
(East Japan Railway Company)
(East Japan Railway Company)
Medium: conference paper
Language(s): English
Conference: IABSE Congress: The Evolving Metropolis, New York, NY, USA, 4-6 September 2019
Published in:
Page(s): 1917-1921 Total no. of pages: 5
Page(s): 1917-1921
Total no. of pages: 5
DOI: 10.2749/newyork.2019.1917
Abstract:

We are carrying out a construction project of new railroad viaducts. These new railroad viaducts are constructing using about 110,000 mĀ³volume 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.

Keywords:
durability FRP alkali silica reaction (ASR) Fly-ash Andesite Ramen-viaduct