Emulsified asphalt cold recycled mixture based on rheological properties(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2018年04期
- Page:
- 21-28
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Emulsified asphalt cold recycled mixture based on rheological properties
- Author(s):
- GAO Xinwen; PANG Jinyu
- （1. School of Traffic and Transportation Engineering, Changsha University of Science and Technology,Changsha 410004, Hunan, China; 2. Transport Department of Shanxi Province, Taiyuan 030001, Shanxi,China; 3. Shanxi Transportation Research Institute, Taiyuan 030006, Shanxi, China）
- Keywords:
- road engineering; emulsified asphalt cold recycled mixture; rheological property; interfacial rheology; dynamic shear rheology
- PACS:
- -
- DOI:
- -
- Abstract:
- Interfacial rheology and dynamic shear rheology were employed to investigate the effect of rheological properties of emulsified asphalt on the performance index of cold recycled mixture with emulsified asphalt, as well as to provide guidance for establishing the performance index. The main characteristic parameters were set up, including interfacial dilational modulus, viscous/elastic modulus, phase angle, and viscous to elastic transition. The variations of all the parameters as functions of temperature and frequency, and their effects on the properties of cold recycled mixture were studied. The ideal Maxwell model was used to calculate the real model of the fluid. Based on the interaction mechanism and rheological model, the relationship between the rheological parameters and the pavement properties of cold recycled mixture with emulsified asphalt was established, and it can be applied for the property evaluation of the cold recycled mixture. The results show that the rheological parameters related to the pavement properties of emulsified asphalt cold recycled mixture. The dilational modulus as well as viscosity has a positive correlation with the storage stability of the asphalt emulsion. A large dilational modulus and high viscosity result in favorable storage stability for the asphalt emulsion. The rheological parameters of the transition temperature from the viscous to elastic state and the modulus have a positive correlation with the strength and moisture stability of the cold recycled mixture. A high transition temperature and modulus of the emulsified asphalt result in high values of strength and moisture stability of the cold recycled mixture. Furthermore, the diagrams of colecole (elastic modulus versus viscous modulus) and G′/G″ω (elastic modulus G′ and viscous modulus G″ versus frequency ω) deviate from the classical Maxwell fluid model, indicating a nonlinear viscoelastic fluid with a nonstructural relaxation time. These results could provide a database for theoretical research and help to establish a performance index for emulsified asphalt cold recycled mixture. 2 tabs, 9 figs, 24 refs.
Last Update: 2018-08-03