Curing of Asphalt Emulsified Tack Coat Subjected to Malaysian Weather Conditions
Publication: Journal of Materials in Civil Engineering
Volume 27, Issue 4
Abstract
Curing of asphalt emulsions ensures the proper strength development of the material with the evaporation of water. This paper focuses on determining the minimum curing time needed for Malaysian asphalt emulsions. Three factors, including curing conditions (indoor, outdoor, and curing at night), asphalt emulsion types (RS-1k, RS-2k, RS-2kL, RS-3k, Ralumac, and SRSB) and application rates (high, medium, and low), were investigated. The curing time was determined by weighing a specimen repeatedly at a certain time interval until a constant weight was achieved. Statistical analysis of analysis of variance (ANOVA) was also performed to study if there are differences between groups of variables. From the results, it was found that curing conditions incorporating weather characteristics (i.e., wind speed, temperature, relative humidity, and solar radiation) are the most significant factor affecting the curing time of a particular asphalt emulsion. Curing of asphalt emulsions for construction at night proved to be unworkable due to the absence of solar radiation with relatively low temperature and high relative humidity. On the other hand, a low application rate of asphalt emulsions generally cured faster regardless of the curing conditions and asphalt emulsion types.
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Acknowledgments
The authors are grateful to the Ministry of Higher Education (MOHE), Universiti Teknologi Malaysia Research grants (GUP Tier 2 Vote 06J52), and the Fundamental Research Grant Scheme (FRGS Vote 4F201) for the financial support in this research project. The authors would also like to express their deepest appreciation to all those who provided the possibility to complete this research. Special thanks go to the Alloy MTD Group and Asa Infratech (M) Sdn. Bhd. for supplying the asphalt emulsions and providing necessary information.
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Information & Authors
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Published In
Journal of Materials in Civil Engineering
Volume 27 • Issue 4 • April 2015
Copyright
© 2014 American Society of Civil Engineers.
History
Received: Aug 27, 2013
Accepted: Apr 11, 2014
Published online: Jul 24, 2014
Discussion open until: Dec 24, 2014
Published in print: Apr 1, 2015
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