Evaluation of Indicator Tests for Identification of Segregation in Flexible Pavements - A Case Study

Authors

  • Mohd Rosli Hainin Department of Geotechnics and Transportation Faculty of Civil Engineering Universiti Teknologi Malaysia

DOI:

https://doi.org/10.11113/mjce.v12.15633

Keywords:

Segregation. Macrotexture. Unit Weight

Abstract

Segregation of hot mix asphalt (HMA) is a continuing problem in construction
practice which has caused premature distress in many flexible pavements. A
study, funded by the Kansas Department of Transportation, was conducted on a
newly constructed pavement to evaluate the effectiveness of indicator tests m
detection of segregation.
Cores were obtained from segregated and non-segregated areas of the pavement
and the unit weights of the pavement were determined using a thin-lift nuclear
gauge. The change gradation on the 4.75 mm sieve was compared with the
indicator tests of asphalt content, i.e., nuclear gauge unit weight, core unit weight
and macrotexture.
The results of this study indicate that asphalt content is the best indicator test of
segregation whilst macrotexture is the best non-destructive indicator test of
segregation.

References

Brown, E. R., R. Collins, and J. R. Brownfield. "Investigation of segregation of

Asphalt Mixtures in the State of Georgia". Transportation Research Record

No. 1217, Transportation Research Board, Washington, D.C., 1989.

Cross, S. A. and E.R. Brown. "Effect of Segregation on Perfonnance of Hot Mix

Asphalt". Transportation Research Record No. 1417, Transportation

Research Board, Washington, D.C., 1993.

Kandhal, Prithvi S. And Stephen A. Cross. "Effects of Aggregate Gradation on

Measured Asphalt Content". Transportation Research Record No. 1417,

Transportation Research Board, Washington, D.C., 1993.

Webb, M. "Identifying Segreation with a Continuous Density System". Report

No. F.o. 94-14, Division of Materials aNd Research, Missouri Highway and

Transportation Department, Jefferson City, Missouri., January 1995

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Published

2018-02-20

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Section

Articles

How to Cite

Evaluation of Indicator Tests for Identification of Segregation in Flexible Pavements - A Case Study. (2018). Malaysian Journal of Civil Engineering, 12(2). https://doi.org/10.11113/mjce.v12.15633