Study on concrete deterioration and deterioration indicators in marine environments

Toru Yamaji, Yoshikazu Akira, Hidenori Hamada, Kazuo Yamada

Research output: Contribution to journalConference articlepeer-review

Abstract

In order to investigate the deterioration of concrete in marine environments, both concrete cores sampled from existing structures and test specimens exposed in an outdoor pool of natural seawater are used. These specimens were examined using the Vickers hardness test and EPMA (Electron Prove Micro Analyzer). The following behaviors were observed: 1) The penetration depth of Mg2+ was correlated with both the neutralization depth and the depth of SO4 2- penetration. 2) Deteriorated areas in concrete specimens determined by Vickers hardness were correlated with the penetration depth of Mg2+. One reason for this deterioration is considered to be the phase change of C-S-H (Calcium silicate hydrate) to M-S-H (Magnesium silicate hydrate), which has a lower strength than C-S-H. 3) The penetration depth of Mg2+ can be an indicator of concrete deterioration progress in marine environments.

Original languageEnglish
Article numbere257
JournalSustainable Construction Materials and Technologies
Volume2013-August
Publication statusPublished - 2013
Event3rd International Conference on Sustainable Construction Materials and Technologies, SCMT 2013 - Kyoto, Japan
Duration: Aug 18 2013Aug 21 2013

All Science Journal Classification (ASJC) codes

  • Civil and Structural Engineering
  • Building and Construction
  • Mechanics of Materials
  • Materials Science(all)

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