TRB Webinar: Ensuring Construction Quality Assurance with Light-Weight Deflectometers

September 30, 2021 01:00 PM - 02:30 PM U.S. Eastern
Cost (for your seat)
Professional Development Hours for this webinar
1.50 hour(s)
Continuing Education Hours for this webinar
AAE: 0.00 hour(s)
AICP: 0.00 hour(s)
CLE: 0.00 hour(s)

Light-weight deflectometers (LWDs) are increasingly being used for controlling the quality of compacted aggregate and soil layers as a partial or full replacement of conventional density testing. TRB will host a webinar on Thursday, September 30, 2021 from 1:00-2:30 PM Eastern to identify the latest practices in using LWDs for construction. Presenters will highlight current modulus-based compaction quality assurance (QA) methods that state departments of transportation use, describe the variety of LWDs in use, and identify the effect of the LWD’s configuration when measuring deflection. They will also discuss the steps required to further implement LWDs as a tool for construction acceptance of unbound material layers.

This webinar is sponsored by the TRB Standing Technical Committee on Aggregates.

Some registrants will need to pay $55 to attend this webinar. Sign into to view registration information.

Webinar agenda and presenters

  1. Review of compaction QA methods: Charles Schwartz, University of Maryland, and Xiong Zhang, Missouri University of Science and Technology
  2. Modulus-based compaction QA testing using LWDs: Charles Schwartz, University of Maryland
  3. State department of transportations’  QA specifications and practices of applying LWDs: Xiong Zhang, Missouri University of Science and Technology
  4. Indiana’s experience in construction QA and field performance: Nayyar Siddiki, Indiana DOT
  5. Summary and conclusion: Andrew Dawson, University of Nottingham
  6. Question and answer session: Moderated by Andrew Dawson, University of Nottingham

The first 60 minutes of the webinar will be for presentations and the final 30 minutes will be reserved for audience questions.

Learning Objectives

At the end of this webinar, participants will be able to:

  1. Identify conventional methods of construction QA for compacted unbound material layers
  2. Identify how to incorporate modulus-based methods in construction QA
  3. Implement LWDs in construction QA

Professional Development Hour Information

Professional engineers (PEs) who register and attend the entire webinar as an individual will be awarded 1.5 Professional Development Hours (PDHs). TRB’s webinar program awards PDH credits only to the registered individual, and not to other members of a group that view the webinar together. To be eligible for the credits, individuals must remain signed in for the entire webinar, including for any question and answer session following the presentations.

Please check with your licensing board to ensure that TRB webinar PDHs are approved by your board.

TRB will report credits earned to the Registered Continuing Education Program (RCEP). Complaints about registered providers may be sent to RCEP, 1015 15th Street, NW, 8th Floor, Washington, D.C., 20005.

Pre-registration is required. Once the webinar starts, you will be unable to register. Individuals that are registered for a webinar but do not receive their confirmation emails due to their organization’s internal firewalls should contact the TRB Helpdesk for assistance in signing in.

View our FAQ page for more information.

Registration questions? Contact TRB Webinars.