eprintid: 1410474
rev_number: 32
eprint_status: archive
userid: 608
dir: disk0/01/41/04/74
datestamp: 2013-10-20 18:49:19
lastmod: 2021-10-04 00:23:27
status_changed: 2013-10-20 18:49:19
type: article
metadata_visibility: show
item_issues_count: 0
creators_name: Yue, Y
creators_name: Bai, Y
creators_name: Muhammed Basheer, PA
creators_name: Boland, JJ
creators_name: Wang, JJ
title: Monitoring the cementitious materials subjected to sulfate attack with optical fiber excitation Raman spectroscopy
ispublished: pub
divisions: UCL
divisions: B04
divisions: C05
divisions: F44
note: © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.
abstract: Formation of ettringite and gypsum from sulfate attack together with carbonation and chloride ingress have been considered as the most serious deterioration mechanisms of concrete structures. Although electrical resistance sensors and fiber optic chemical sensors could be used to monitor the latter two mechanisms on site, currently there is no system for monitoring the deterioration mechanisms of sulfate attack. In this paper, a preliminary study was carried out to investigate the feasibility of monitoring sulfate attack with optical fiber excitation Raman spectroscopy through characterizing the ettringite and gypsum formed in deteriorated cementitious materials under an optical fiber excitation + objective collection configuration. Bench-mounted Raman spectroscopy analysis was also conducted to validate the spectrum obtained from the fiber-objective configuration. The results showed that the expected Raman bands of ettringite and gypsum in the sulfate-attacked cement paste can be clearly identified by the optical fiber excitation Raman spectrometer and are in good agreement with those identified from bench-mounted Raman spectrometer. Therefore, based on these preliminary results, it is considered that there is a good potential for developing an optical fiber-based Raman system to monitor the deterioration mechanisms of concrete subjected to sulfate attack in the future. © The Authors.
date: 2013-10-23
official_url: http://dx.doi.org/10.1117/1.OE.52.10.104107
vfaculties: VENG
oa_status: green
full_text_type: pub
primo: open
primo_central: open_green
verified: verified_manual
elements_source: Scopus
elements_id: 910698
doi: 10.1117/1.OE.52.10.104107
lyricists_name: Bai, Yun
lyricists_name: Yue, Yanfei
lyricists_id: YBAIX06
lyricists_id: YYUEX97
full_text_status: public
publication: Optical Engineering
volume: 52
number: 10
article_number: 104107
issn: 0091-3286
citation:        Yue, Y;    Bai, Y;    Muhammed Basheer, PA;    Boland, JJ;    Wang, JJ;      (2013)    Monitoring the cementitious materials subjected to sulfate attack with optical fiber excitation Raman spectroscopy.                   Optical Engineering , 52  (10)    , Article 104107.  10.1117/1.OE.52.10.104107 <https://doi.org/10.1117/1.OE.52.10.104107>.       Green open access   
 
document_url: https://discovery.ucl.ac.uk/id/eprint/1410474/1/OE_52_10_104107.pdf