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Li Y, Bai T, Zhang J, Gao Y. Advances in Regenerated Asphalt Mixtures. MATERIALS (BASEL, SWITZERLAND) 2023; 16:2872. [PMID: 37049165 PMCID: PMC10095993 DOI: 10.3390/ma16072872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2023] [Accepted: 04/03/2023] [Indexed: 06/19/2023]
Abstract
This Special Issue is devoted to research on asphalt pavement materials, including asphalt binders, asphalt mixtures and recycled asphalt pavement (RAP) [...].
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Affiliation(s)
- Yuanyuan Li
- School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China
| | - Tao Bai
- School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430074, China
| | - Jizhe Zhang
- Qilu School of Transportation, Shandong University, Jinan 250061, China
| | - Yangming Gao
- School of Civil Engineering and Built Environment, Liverpool John Moores University, Byrom Street, Liverpool L3 3AF, UK
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Yi J, Feng J, Li Y, Bai T, Chen A, Gao Y, Wu F, Wu S, Liu Q, Li C. Research on Design and Performance of Self-Compacting Cement Emulsified Bitumen Mixture (CEBM). MATERIALS 2022; 15:ma15144840. [PMID: 35888307 PMCID: PMC9316300 DOI: 10.3390/ma15144840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/04/2022] [Accepted: 07/07/2022] [Indexed: 02/04/2023]
Abstract
To meet the needs of the road industry for maintenance operations, a new cement emulsified bitumen mixture (CEBM) with early-strength, self-compacting, and room-temperature construction characteristics was designed. The strength formation mechanism of CEBM was revealed with a scanning electron microscope (SEM) and the surface free energy (SFE) theory. The mechanical properties and road performance of the CEBM were investigated extensively. The results show that before the demulsification of emulsified bitumen, the SFE of the bitumen–aggregate–water three-phase system was reduced due to the replacement of the bitumen–aggregate interface with water. The adhesion work between the emulsified bitumen and the aggregate is negative, which means the adhesion between the emulsified bitumen and the aggregate will not occur spontaneously due to the existence of water. The liquid emulsified bitumen improves the workability of the mixture and ensures that the mixture can be evenly mixed and self-compacted. After demulsification, the work of adhesion between the residual bitumen and the aggregate is positive, which means residual bitumen and aggregate can bond spontaneously. In addition, the hydration products of cement and aggregate form a skeleton, and the emulsified bitumen film wraps and bonds the cement and aggregate together, creating strength. The emulsified bitumen, cement content, and curing conditions have significant effects on the stability of CEBM. The recommended dosage of emulsified bitumen and cement is 8% and 8–10%, respectively. This material integrates the hardening effect of cement and the viscoelastic performance of bitumen and has good workability, mechanical properties, and road performance. Therefore, the CEBM is technically feasible for application to bitumen pavement.
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Affiliation(s)
- Jinming Yi
- School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430205, China; (J.Y.); (T.B.); (F.W.)
- Poly Changda Engineering Co., Ltd., Guangzhou 510062, China
| | - Jianlin Feng
- School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430205, China; (J.Y.); (T.B.); (F.W.)
- Correspondence: (J.F.); (Y.L.)
| | - Yuanyuan Li
- School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430205, China; (J.Y.); (T.B.); (F.W.)
- Correspondence: (J.F.); (Y.L.)
| | - Tao Bai
- School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430205, China; (J.Y.); (T.B.); (F.W.)
| | - Anqi Chen
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China; (A.C.); (S.W.); (Q.L.)
| | - Yangming Gao
- Faculty of Civil Engineering & Geosciences, Delft University of Technology, Stevinweg 1, 2628 CN Delft, The Netherlands;
| | - Fan Wu
- School of Civil Engineering and Architecture, Wuhan Institute of Technology, Wuhan 430205, China; (J.Y.); (T.B.); (F.W.)
| | - Shaopeng Wu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China; (A.C.); (S.W.); (Q.L.)
| | - Quantao Liu
- State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China; (A.C.); (S.W.); (Q.L.)
| | - Chuangmin Li
- School of Traffic and Transportation Engineering, Changsha University of Science and Technology, Changsha 410114, China;
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