Quarterly Report of RTRI
Online ISSN : 1880-1765
Print ISSN : 0033-9008
ISSN-L : 0033-9008
PAPERS
Mechanism and Countermeasures of Coarse Aggregate Spalling in Aged Concrete Tunnel Linings
Sohei NISHIOTakahiko SASAKIYoshiyuki KOJIMA
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2006 Volume 47 Issue 3 Pages 132-137

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Abstract

A number of defective conditions such as coarse aggregate spalling are visible on cast-in-place concrete tunnel linings covered with accumulated soot emitted by steam locomotives. It is apparent that such defects have mainly occurred at construction joints or honeycombing existed since the beginning of the concrete construction. We conducted a study into the mechanism of such defects; hence, this paper describes the results of the study and countermeasures to cope with such defects.

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© 2006 by Railway Technical Research Institute
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