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NACOE Advanced methods for compaction quality control

by Australian Road Research Board on June 12, 2018

In situ density and CBR testing are primarily used for quality assurance during the roadwork construction. There are two issues with this standard approach:

  1. Neither density nor CBR are the end game.
  2. Modern geotechnical and pavement designs are often based on in situ modulus values, and it is assumed that there is a direct correlation between density and modulus. However, this assumption is often invalid in many cases.

The webinar is the first of the series to introduce alternative methods to assess compaction in the field (Refer Figure). The audience will be introduced to a range of testing techniques that have become available to the civil engineering community over the past two decades. The advantages, limitations, and fundamentals of the measurements will be discussed.

ARRB - Compaction testing

The acceptance of earthwork embankment construction currently relies on density testing and the California Bearing Ratios (CBRs) for Quality Assurance (QA) of earthworks and unbound granular pavement layers.

These tests are:

  • Lag indicators – Several days to over one week is required to complete evaluation of sampled materials.
  • Need Oversize correctionsThis correction is not consistently being applied across the industry.
  • Not a direct measurement of strength or modulus – Design is based on strength and modulus values. A (widely) correlated relationship is assumed.

Join us for this FREE webinar on June 26, 2018 at 12:00 PM AEST.

Participants please note - the session will commence at 12:00 pm AEST (Australian Eastern Standard Time). There may be time zone differences that apply. It is recommended that you connect to the webinar 15 minutes prior to allow sufficient time to connect in.

Registration for this FREE webinar is essential.

Register Now

After registering, you will receive a confirmation email containing information about joining the webinar.

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