Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Estimating In Situ Optimum Bitumen Content of Dense Bituminous Macadam: An Alternative Approach

Estimating In Situ Optimum Bitumen Content of Dense Bituminous Macadam: An Alternative Approach Optimum bitumen content (OBC) in dense bituminous macadam (DBM) in India is determined using Marshall mix design method, which simulates the field condition in laboratory. It is a cumbersome, temperature-controlled laboratory process varies widely from the actual field condition. To overcome this mismatch, an easy empirical method is attempted for calculating in situ OBC in DBM. In the process, the OBC is calculated as a function of physical properties of the materials used in DBM for bitumen viscosity grade-30 (VG-30) and compared with the actual bitumen consumptions in the field samples obtained through bitumen extraction test. The laboratory DBM specimens prepared based on each field sample gradation using OBC calculated by empirical method are tested for Marshall properties for field acceptability. The analysis of forty-field samples concluded that the OBC calculated by empirical method can be comparable with actual consumption with a negligible average variation of 0.03554%, ascertaining the use of alternative method as an in situ model of calculating OBC for DBM. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of The Institution of Engineers (India): Series A Springer Journals

Estimating In Situ Optimum Bitumen Content of Dense Bituminous Macadam: An Alternative Approach

Loading next page...
 
/lp/springer-journals/estimating-in-situ-optimum-bitumen-content-of-dense-bituminous-macadam-9IHB7tSnHM
Publisher
Springer Journals
Copyright
Copyright © 2018 by The Institution of Engineers (India)
Subject
Engineering; Civil Engineering
ISSN
2250-2149
eISSN
2250-2157
DOI
10.1007/s40030-018-0322-7
Publisher site
See Article on Publisher Site

Abstract

Optimum bitumen content (OBC) in dense bituminous macadam (DBM) in India is determined using Marshall mix design method, which simulates the field condition in laboratory. It is a cumbersome, temperature-controlled laboratory process varies widely from the actual field condition. To overcome this mismatch, an easy empirical method is attempted for calculating in situ OBC in DBM. In the process, the OBC is calculated as a function of physical properties of the materials used in DBM for bitumen viscosity grade-30 (VG-30) and compared with the actual bitumen consumptions in the field samples obtained through bitumen extraction test. The laboratory DBM specimens prepared based on each field sample gradation using OBC calculated by empirical method are tested for Marshall properties for field acceptability. The analysis of forty-field samples concluded that the OBC calculated by empirical method can be comparable with actual consumption with a negligible average variation of 0.03554%, ascertaining the use of alternative method as an in situ model of calculating OBC for DBM.

Journal

Journal of The Institution of Engineers (India): Series ASpringer Journals

Published: Aug 31, 2018

References