Prototype Development: Automated and Continuous Aggregate Sampling and Laser Targeting System

This report presents the activities and results associated with the development of a laser scanning prototype device, referred to as the Sampling and Laser Targeting System (SLT). The SLT provides the potential means to rapidly classify aggregates used in highway construction. This classification process can be employed to: quantify specific engineering properties; identify and/or quantify the presence and amounts of deleterious materials present; determine whether aggregate types or quality are changing during production; and determine the source material or sources of blended production materials. This project involved the design and fabrication of a prototype SLT, the development of software capable of operating the system and processing, through chemometric modeling, the large quantity of data generated during the scanning process to provide near real-time data turnaround. It was concluded from these findings that laser scanning in near real-time of aggregate materials is a technology capable of significantly improving the manner in which aggregate quality control procedures are employed by the industry. The SLT prototype developed during the course of this investigation provides a system capable of processing aggregate samples and can be operated by material technicians with no special training. The findings also indicate that the development of the technology will require establishing suitable and expanded laser-induced spectral information databases for target aggregates of interest, with sufficient numbers and types of sample to properly characterize the target property. Improvements in data analytical techniques still being evaluated will further assist in resolving the spectral information generated during the laser scanning process and improving model predictions of aggregate properties.

  • Record URL:
  • Supplemental Notes:
    • This NCHRP-IDEA investigation was conducted by Chesner Engineering and New Mexico State University.
  • Authors:
    • Chesner, Warren H
    • McMillan, Nancy J
  • Publication Date: 2015-9


  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; Photos; References; Tables;
  • Pagination: 45p
  • Serial:
  • Publication flags:

    Open Access (libre)

Subject/Index Terms

Filing Info

  • Accession Number: 01599014
  • Record Type: Publication
  • Report/Paper Numbers: NCHRP IDEA Project 168
  • Files: TRIS, TRB, ATRI
  • Created Date: Apr 29 2016 2:18PM