| dc.description.abstract | WMA, or Warm Mix Asphalt, is highly regarded for its energy-saving benefits and reduced emissions of smoke and gases, creating a better working environment for construction teams and laboratory professionals. The technology achieves this by lowering the temperatures at which asphalt mixtures are
mixed and compacted, resulting in decreased greenhouse gas emissions. Globally, WMA is widely embraced for its positive environmental impact, and its characteristics do not compromise the inherent performance and subsequent quality of asphalt mixtures. This study was undertaken against the
backdrop of growing concerns about environmental issues. Its primary objective is to investigate the distinctions in materials and performance between WMA additives and traditional Hot Mix Asphalt (HMA) in a laboratory setting. Three warm mix additives were employed, and Marshall design methods were applied according to specified design rules. Both four-inch and six-inch specimens were utilized to compare and analyze volume properties, including void content and VMA. The study evaluated the influence of warm mix additives on WMA performance and compared it with HMA to comprehend the variances and impacts. Furthermore, the study delved into the practicality and effectiveness of WMA through retention strength tests and Hamburg Wheel-Tracking Tests.
Results from this research demonstrate that all three additives contribute to enhancing low temperature performance in testing while ensuring effective coverage of aggregate asphalt and optimal mixing. At a temperature of 128 degrees, the performance of these additives is comparable to HMA,showcasing similar compaction processing characteristics of WMA. Performance test results indicate
that WMA meets or surpasses standards in coating,compaction , moisture sensitivity, and rutting resistance, displaying consistent performance across various parameters. In summary, the application of chemical additives in WMA, as evidenced by various laboratory tests, plays a pivotal role in enhancing the overall performance of WMA, meriting further in-depth research. | en_US |