Identifying the effects of different construction practices on the spectral characteristics of concrete

Identifying the effects of different construction practices on the spectral characteristics of concrete

The objective of this study was to investigate the effects of different construction practices on the spectral characteristics of the concrete. Concrete blocks of identical shape and size (20 × 20 × 6 cm 3) were prepared using different treatment processes to establish eight different concrete chara...

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Bibliographic Details
Published in:Cement and concrete research Vol. 38; no. 4; pp. 538 - 542
Main Authors: Maruthi Sridhar, B.B., Chapin, T.L., Vincent, R.K., Axe, M.J., Frizado, J.P.
Format: Journal Article
Language:English
Published: New York, NY Elsevier Ltd 01-04-2008
Elsevier Science
Subjects:
Applied sciences
Buildings. Public works
Concrete
Concretes. Mortars. Grouts
Construction
Exact sciences and technology
General (composition, classification, performance, standards, patents, etc.)
Materials
Spectral ratios
Spectral reflectance
Construction
Concrete
Spectral ratios
Spectral reflectance
Characteristics
Professional practice
Construction materials
Spectral analysis
Comparative study
Building process
Precast concrete block
Reflectance
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Summary:The objective of this study was to investigate the effects of different construction practices on the spectral characteristics of the concrete. Concrete blocks of identical shape and size (20 × 20 × 6 cm 3) were prepared using different treatment processes to establish eight different concrete characteristics. The different concrete treatments were: T C (control), T NC (no cure), T CL (cool cure), T H (heat cure), T HW (high water content), T HC (half cement), T G (gravel), and T L (limestone). Spectral reflectance of all the concrete blocks was obtained in the laboratory from 350–2500 nm spectral range using a portable, hand-held spectroradiometer. The spectral reflectance of the different concrete treatments varied systematically with changes in the concrete characteristics that resulted from different construction practices. Detailed spectral analysis shows that the spectral absorption features around 450, 1380 and 1850 nm are highly correlated with changes in the characteristics of the concrete. The spectral ratios R 600/R 450, R 1380/R 1440, R 1850/R 1950 and R 2150/R 880 can clearly differentiate the T NC- and T CL-treated concrete blocks from the other blocks with different concrete treatments. The spectral ratio R 600/R 450 can differentiate the T C-, T G- and T L-treatments, which were considered to have better concrete quality from the rest of the concrete treatments. The spectral results clearly indicate the potential application of spectral reflectance in assessing concrete characteristics after the concrete has hardened.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0008-8846
1873-3948
DOI:10.1016/j.cemconres.2007.11.012