A comprehensive review on the plant-mixed cold recycling technology of emulsified asphalt: Raw materials and factors affecting performances

• Published in: Construction & building materials Vol. 439; p. 137344
• Main Authors: Xing, Chengwei, Tang, Shixian, Chang, Zhibin, Han, Zhanchuang, Li, Haozongyang, Zhu, Bohan
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 16-08-2024
• Subjects: Challenges and suggestions; Cold recycling technology; Emulsified asphalt; Influence factors; Raw materials; RAP; SBR; BF; MS; Raw materials; DS; VVTM; TSR; Emulsified asphalt; Cold recycling technology; MCM; Influence factors; Challenges and suggestions; CRME; SEM; CRTE; Gf
• ISSN: 0950-0618; 1879-0526
• DOI: 10.1016/j.conbuildmat.2024.137344

The plant-mixed cold recycling technology of emulsified asphalt (CRTE) is widely applied in road engineering due to its environmental and economic advantages. The composition of raw materials directly affects the road performances of the mixtures, and then affects the serving quality of the asphalt pavement. Therefore, an in-depth interpretation of various raw materials and factors affecting the performances is crucial for enhancing the design and production of cold recycled asphalt mixtures of emulsified asphalt (CRME). The present paper provides a review of the state-of-the-art studies in the area of the composition of raw materials and performances influencing factors of CRME. Firstly, the roles of reclaimed asphalt pavement (RAP) materials and virgin aggregates in CRME are briefly introduced. Secondly, the strength formation mechanism of five additives and emulsified asphalt is introduced in detail. Afterwards, critical factors affecting the road performances of the mixtures are described in detail. Finally, some challenges in the current research are discussed, and the corresponding recommendations are proposed for future exploration.
•Introduce the composition of raw materials in CRME.•Summarize the strength formation mechanism of various raw materials.•Describe the critical factors affecting the road performances of the CRME.•Provide technical challenges and future recommendations for CRTE.