Non-destructive chemical analysis of water and chlorine content in cement paste using near-infrared spectroscopy

A. Watanabe, H. Furukawa, S. Miyamoto, H. Minagawa

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)

Abstract

Chloride induced deterioration of concrete structures is well underway when the damage is visually detected during inspection. If such damage was identified using a non-destructive method, inspection costs would reduce significantly. We tested the use of near-infrared (NIR) spectroscopy for non-destructive multicomponent analysis of cement pastes. Cement paste samples with varying chloride-ion concentrations and humidity were prepared for different cement types. Reflectance spectra were obtained, then total moisture content (v/v) and chloride ion concentrations were measured using destructive testing as a reference. A correlation was observed between the measured water amount/chloride ion concentration and respective NIR absorption values.

Original languageEnglish
Pages (from-to)95-104
Number of pages10
JournalConstruction and Building Materials
Volume196
DOIs
Publication statusPublished - 2019 Jan 30

Keywords

  • Ettringite
  • Friedel's salt
  • Moisture content
  • Multicomponent analysis
  • Near-infrared spectroscopy
  • Non-destructive testing
  • Portlandite

ASJC Scopus subject areas

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

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