Direct Estimation of Air Void Content from Gyratory Compaction History

Authors

  • Eyal Levenberg

Abstract

A computational approach is offered and explored for estimating the air void content of asphalt mixtures densified in the Superpave gyratory compactor. It entails fitting a sigmoidal function to the compaction history records of specimen height vs. gyration level. The compaction progress is then extrapolated mathematically to infinite number of gyrations for which the air void content is theoretically zero. The fitted densification curve is then used to estimate the air void content at any finite gyration level of interest. Different asphalt mixtures consisting of both dense and coarse aggregate gradations are compacted to assess the approach. At this point of development, based on comparison with measured air void contents, acceptable estimations are obtained only for dense-graded mixes. It is envisioned that the ideas proposed herein will be programmed into future gyratory equipment to provide operators with an estimated air void content immediately after compaction.  

 

Keywords: gyratory compaction, air void content, asphalt content, extrapolation, method comparison. 

Downloads

Published

2020-12-14

Issue

Vol. 3 No. 1 (2013)

Section

Articles

License

Declaration and Copyright Transfer Form

(to be completed by authors)

I/ We, the undersigned author(s) of the submitted manuscript, hereby declare, that the above manuscript which is submitted for publication in the STM Journals(s), is not published already in part or whole (except in the form of abstract) in any journal or magazine for private or public circulation, and, is not under consideration of publication elsewhere.

  • I/We will not withdraw the manuscript after 1 week of submission as I have read the Author Guidelines and will adhere to the guidelines.
  • I/We Author(s ) have niether given nor will give this manuscript elsewhere for publishing after submitting in STM Journal(s).
  • I/ We have read the original version of the manuscript and am/ are responsible for the thought contents embodied in it. The work dealt in the manuscript is my/ our own, and my/ our individual contribution to this work is significant enough to qualify for authorship.
  •  I/We also agree to the authorship of the article in the following order:

Author’s name                                    

 

1. ________________

2. ________________

3. ________________

4. ________________

 

We  Author(s) tick this box and would request you to consider it as our signature as we agree to the terms of this Copyright Notice, which will apply to this submission if and when it is published by this journal.