Online sensor system based on laser-induced breakdown spectroscopy in quality inspection of demolition concrete

Title

Online sensor system based on laser-induced breakdown spectroscopy in quality inspection of demolition concrete

 Author

Xia, H.
Bakker, M.C.M.

Faculty

Civil Engineering and Geosciences

 Department

Structural Engineering

 Date

2012-03-12

 Abstract

In the C2CA project, an online sensor system is required to measure and control the quality and homogeneity of demolition concrete continuously. Laser-induced breakdown spectroscopy is a candidate to fulfil the objective in several tasks. Investigated is the ability of LIBS as an online semi-quantitative composition analysis technique. The maximum laser repetition rate of 100 Hz and each measurement by single laser shot within 5 ms enable the online application in real time. The wavelength range between 273 nm and 326 nm is chosen for differentiations between mineral alloys and CaO powder. Principal component analysis is applied to differentiate between slag concrete, cement and calcium oxide samples, as based on the Ca II photon counts at 315.76 nm, 317.916 nm, 393.189 nm and 396.608 nm. The effects of different sample preparation procedures on the laser shot-to-shot repeatability are also characterized. The encouraging results indicate the eligibility of LIBS for online quality inspection of concrete products.

 To reference this document use:

http://resolver.tudelft.nl/uuid:73f5290f-1563-45b3-9dd2-023cd7598947

 Publisher

International Society for Industrial Ecology

 Source

27th International Conference on Solid Waste Technology and Management, Philadelphia, USA 11-14 maart 2012

 Part of collection

Institutional Repository

 Document type

conference paper

 Rights

(c) Delft University of Technology
Files
PDF 283796.pdf 735.14 KB
Close viewer