期刊
INTERNATIONAL JOURNAL OF PAVEMENT ENGINEERING
卷 18, 期 8, 页码 682-692出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/10298436.2015.1121779
关键词
Recycled asphalt; warm mix additive; response surface method; optimum binder content; volumetric properties; strength behaviour
类别
资金
- Universiti Sains Malaysia through Research University Individual Grant Scheme (RUI) [1001/PAWAM/814231]
This paper presents a new approach to estimate the optimum binder content (OBC) of recycled asphalts (RAs) incorporating a warm mix additive based on the interaction effects of compaction temperature, RA content and binder content using volumetric and strength characterisation. The experimental design was developed using response surface method (RSM) based on central composite design for various compaction temperatures (130-160 degrees C), RA contents (30-50%) and binder contents (4.9-6.0%). Laboratory tests were performed and analysed to meet the desired volumetric and strength properties according to the Malaysian specifications for the design of dense asphalt mixtures. Statistical analysis and mathematical models proposed by RSM were used to determine the OBC. The results showed that compaction temperature is the most significant factor in determining the OBC. There are minimum differences in the OBC variation of samples incorporating different dosage of RA. The developed model can be used for quick estimation of OBC for various levels of compaction temperature and RA content.
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