Abstract
Hot mix asphalt (HMA) is a conventional mixture that is commonly used in Malaysia. Production of HMA requires high temperature which produces high carbon dioxide (CO²) emission and gives bad impact to the environment. During the construction, cool weather is one of the factor that can influence the temperature of HMA mixture. It will reduce the mixture temperature during compaction. Warm mix asphalt (WMA) is one of the methods to overcome this issue. Even though HMA mixture is produced at higher temperature, the rate of cooling also high. This study focused on evaluating the performance of HMA and WMA as related to the compaction design. The types of mixture used were HMA and WMA with 14 mm nominal maximum aggregate size. The oil based additive used in WMA was Cecabase. This study was conducted at Kg Ayer Merah, Mersing where real time temperature and density were measured during construction. Rate of cooling, degree of compaction (DOC) and rutting performance of mixtures were analysed. By comparing to HMA mixture, the results show that WMA mixture has lower rate of cooling where the temperature of WMA mixture decreases slowly but still provides higher density. WMA also has higher DOC which provides better workability of compaction compared to HMA mixture. Other than that, WMA mixture has lower resilient modulus than HMA mixture which could suggest that WMA mixture is more susceptible to rutting.
Export citation and abstract BibTeX RIS
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.