The article presents the study of physical characteristics of warm mix asphalt cement concrete (WMA), components designed by the Marshall Method. Stability, flow rate, strength index, air void, and percent voids in mineral aggregate (VMA) of a total of 77 specimens were examined as a general standard specification test of the Department of Highways, Thailand. Limestone was used as aggregate. Adhesive mixtures of asphalt grade 60/70 were mixed with admixture “ADVERA” to the ratios of 0.20%, 0.25%, and 0.30% by weight of aggregate. WMA-mixing and compaction temperatures were controlled at 115°C, 120°C, and 125°C. The results were that the asphalt cement mixed with 0.25% of ADVERA (by total mixed) at 125°C shows the best mechanical properties standard, with higher value of stability (2,200lbs, i.e., more than the standard 1,800lbs), flow rate, air void, VMA and hardness index. Finally, this study indicates that asphalt concrete added with admixture ADVERA (WMA) could reduce the mixing and compaction temperature during production processes from >160°C to ≤ 125°C.
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