Identifying the Effects of Different Construction Practices on the Spectral Characteristics of Concrete

The aim of this study was to investigate the effects of different construction practices on the spectral characteristics of concrete. Concrete blocks of identical shape and size (20 × 20 × 6 cm3) were prepared using different treatment processes to establish 8 different concrete characteristics. The different concrete treatments were: T-sub-C (control), T-sub-NC (no cure), T-sub-CL (cool cure), T-sub-H (heat cure), T-sub-HW (high water content), T-sub-HC (half cement), T-sub-G (gravel), and T-sub-L (limestone). Spectral reflectance of all 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-sub-600/R-sub-450, R-sub-1380/R-sub-1440, R-sub-1850/R-sub-1950 and R-sub-2150/R-sub-880 can clearly differentiate the TNC- and TCL-treated concrete blocks from the other blocks with different concrete treatments. The spectral ratio R-sub-600/R-sub-450 can differentiate TC-, TG- and TL-treatments, which were considered to have better concrete quality than the other concrete treatments. The spectral results clearly indicate the potential application of spectral reflectance in assessing concrete characteristics after the concrete has hardened.

• Record URL:
  • https://doi.org/10.1016/j.cemconres.2007.11.012
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/00088846
• Supplemental Notes:
  • Abstract reprinted with permission from Elsevier
• Authors:
  • Maruthi Sridhar, B B
  • Chapin, T L
  • Vincent, R K
  • Axe, M j
  • Frizado, J P
• Publication Date: 2008-4

Language

• English

Media Info

• Media Type: Print
• Features: Figures; References; Tables;
• Pagination: pp 538-542
• Serial:
  • Cement and Concrete Research
  • Volume: 38
  • Issue Number: 4
  • Publisher: Elsevier
  • ISSN: 0008-8846
  • Serial URL: http://www.sciencedirect.com/science/journal/00088846

Subject/Index Terms

• TRT Terms: Concrete construction; Construction management; Spectrum analysis
• Uncontrolled Terms: Spectral ratios
• Subject Areas: Construction; Highways; Materials; I32: Concrete;

Filing Info

• Accession Number: 01099427
• Record Type: Publication
• Files: TRIS
• Created Date: May 21 2008 7:07AM