Journal of the Korean Asphalt Institute ISSN:2234-0785(Print) 2635-9553(Online) 한국아스팔트학회지

Blowing agent is a material that has been applied for a long time in household goods such as plastics, rubber, paper, leather, etc. in various industrial fields. Attempts to apply it to asphalt began in Japan in the early 1990s, and began to be used in some areas in Hokkaido from the mid-1990s. Warm Mix Asphalt using a blowing agent is evaluated as a Warm Mix Asphalt method because it can reduce carbon dioxide and reduce production and compaction temperatures to a greater extent compared to the existing Warm Mix Asphalt method. Considering this point, it is necessary to conduct a study on the applicability of the Warm Mix Asphalt using the blowing agent in Korea by applying the advantages of the blowing agent to asphalt. This study was a basic study on the possibility of developing Warm Mix Asphalt using a blowing agent, and it was examined by conducting an indoor test by mixing it with an asphalt binder and a mixture using an industrial blowing agent currently produced in Korea. This paper provides an extensive literature review especially on Warm Mix Asphalt (WMA) technology. A wide considerations of construction example, current issues and future research topics on WMA were performed. It is well known that WMA is an environment friendly, next generation asphalt pavement technology. However, due to lack of long-term performance evaluation and corresponding results, more prudent consideration on applying WMA on asphalt pavement field is needed. In addition, more extensive studies on gas ventilation system development, evaluation during WMA production and optimized additives development with application process are crucially recommended. Based on this paper, readers can understand advantages, disadvantages and challenges on WMA well in many specialized areas.