Effects of Anti-Stripping Agents in Warm-Mix Asphalt Incorporating Cecabase® Against Moisture Damage

Aman, Mohamad Yusri; Shahadan, Zulkurnain; Razali, Siti Radhiah; Zawani, Zuwairi Izwan
July 2014
Australian Journal of Basic & Applied Sciences;Jul2014, Vol. 8 Issue 10, p446
Academic Journal
The asphalt industry is making constant efforts to minimize energy consumption and reduce emissions by lowering production temperature, made possible by incorporating warm asphalt additives. However, the use of warm-mix asphalt additive may make a mixture susceptible to moisture damage. This study was initiated to evaluate the moisture sensitivity of asphalt mixes incorporated with Cecabase® for three different fillers. The fillers were quarry dust, Ordinary Portland cement (OPC) and newly developed filler known as Pavement Modifier (PMD). Specimens were compacted at different temperatures and evaluated for the moisture sensitivity according to Modified Lottman Test (AASHTO T283) procedures. The result shows that the specimens prepared with PMD have significantly higher ITS and better resistance to water damage. However, it's have lower air voids compared to mixes incorporating OPC and quarry dust fillers. Furthermore, the ITSR results indicate that specimens containing PMD compacted at 150°C and 140°C significantly improves the ITSR for water immersion and freeze-thaw conditions. Specimens incorporating Cecabase® decreased the binder viscosity and increased bitumen stiffness at lower temperature. It can be seen that specimens incorporating PMD filler improved resistance to moisture damage compared to mixes with OPC and dust quarry fillers regardless of compaction temperature.


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