Date Approved


Embargo Period


Document Type


Degree Name

MS Civil Engineering


Civil & Environmental Engineering


Henry M. Rowan College of Engineering

First Advisor

Sukumaran, Beena

Second Advisor

Ramachandran, Ravi

Third Advisor

Lim, Michael


Chemical Composition, LIBS, Material Testing, Quality Control, Quantitative analysis, Spectrometer


Road materials--Analysis; Spectroscopy


Civil and Environmental Engineering


The New Jersey Department of Transport (NJDOT) has a vested interest in the determination of the chemical composition and thereby the mineralogy of aggregates. Depending on the mineralogy of an aggregate sample, it may be inappropriate to use for construction and roadwork purposes. Current methods of determining the mineralogy of aggregates are costly in terms of time, money and convenience. As such, there is a desire for the development of an alternative and efficient method for aggregate mineralogical determination in the field.

The focus of this study is to develop a portable system for aggregate analysis in the field and compare the results with X-Ray Fluorescence (XRF) data provided by the NJDOT. Laser Induced Breakdown Spectroscopy (LIBS), which involves firing a laser pulse at a sample to determine its composition from light spectra emitted via a spectrometer and a custom program, was chosen to be the basis of the portable system. Along with system development, results were analyzed via Partial Least Squares Regression (PLSR). The current analysis technique utilizes split-training and y-scaling to analyze spectra data and performs well for most samples.