| dc.description.abstract | Warm mix asphalt is gaining increasing popularity worldwide, with numerous countries eager to adopt its environmentally friendly and cost effective advantages. Climate change necessitates governments making ＂2050 Net-Zero Emissions＂ pledges and measures. In March 2022, Taiwan will unveil its path to net-zero emissions. The government applies WMA as one of its approaches to encourage net zero-emissions initiatives. This research investigated into different Warm Mix Asphalt (WMA) technologies, such as chemical additives (ZycoTherm), wax additives (Sasobit and Polyethylene), and foaming technologies (Asphamin and water injection system). The goal was to evaluate their effects on the manufacturing process, rheological properties, and asphalt mixture performance. The results showed that ZycoTherm blended easily, whereas wax additives required higher temperatures and longer blending times. Asphamin foaming technology proved to be less complicated than the water injection system, which required additional machinery. At a reduced mixing temperature of 30 °C, all WMA technologies performed well in terms of compactability and workability. Wax additives, on the other hand, had a significant impact on the rheological properties of the binder. Sasobit and Polyethylene can decrease penetration depth, while also increase softening point. The behavior of wax additives is to increase viscosity at low temperatures and decrease viscosity at high temperatures. Increase the failure temperature of DSR for the unaged and after short term aging, respectively. Whereas other additives had no such effect on rheological properties. As a result, rheological tests alone were insufficient for determining mixing and compaction temperatures, as well as the performance of asphalt mixtures. On the other hand, ZycoTherm increase bonding between aggregate and binder which stands out with the best boiling test result (99%).The study also discovered that mixtures containing calcium carbonate as a filler failed to meet moisture resistance requirements and performed poorly in terms of rutting. The addition of cement, on the other hand, significantly improved moisture resistance and rutting resistance for all WMA technologies tested. The moisture resistance increase of 31%, 30%, 34%, 40%, 49%, and 35% for HMA, ZycoTherm, Sasobit, Polyethlene, Asphamin, and water injection system, respectively. The rutting resistance increase 18%, 120%, 54%, 83%, 111%, and 59% for HMA, ZycoTherm, Sasobit, Polyethlene, Asphamin, and water injection system, respectively. Based on the results, Sasobit and ZycoTherm outperform other additives, and all of the WMA technologies used in this study still meet the requirements and can be used in Taiwan. | en_US |