Research on the Performance of Regenerant Modified Cold Recycled Mixture with Asphalt Emulsions

Decai Wang, Tengteng Guo, Haolei Chang, Xianhua Yao, Yuanzhao Chen and Tongning Wang
Additional contact information
Decai Wang: School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Tengteng Guo: School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Haolei Chang: School of Water Conservancy and Environment, Zhengzhou University, Zhengzhou 450001, China
Xianhua Yao: School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Yuanzhao Chen: School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China
Tongning Wang: School of Civil Engineering and Communication, North China University of Water Resources and Electric Power, Zhengzhou 450045, China

Sustainability, 2021, vol. 13, issue 13, 1-17

Abstract: In order to study the mechanical properties and effect of a regenerant on a cold recycled mixture with asphalt emulsions (CRMEs), the moisture susceptibility, high-temperature performance, low-temperature performance, dynamic mechanical properties and durability of CRMEs were analyzed and evaluated by immersion splitting strength tests, freeze-thaw splitting strength tests, rutting tests, semi-circle bending tests, uniaxial compression dynamic modulus tests and indirect tensile tests. Scanning electron microscopy (SEM) was used to analyze the micromorphology of CRMEs modified with regenerant. Finally, a comprehensive evaluation system of five different CRMEs was established based on the efficacy coefficient method to quantitatively analyze the comprehensive performance of the CRMEs. The test results showed that the regenerant can significantly improve the water immersion splitting strength, freeze-thaw splitting strength fracture energy density, and fatigue resistance of CRMEs. However, the addition of regenerant affected the high-temperature performance of the cold recycled mixture. The dynamic modulus of the CRMEs first increased and then decreased with regenerant content increasing. When the regenerant content was 8%, the dynamic modulus of the CRMEs was the highest. Adding styrene-butadiene rubber (SBR) latex can improve the high-temperature performance of CRMEs, but the moisture susceptibility, low temperature performance and fatigue resistance of the cold recycled mixture were not significantly improved, and the dynamic modulus of the mixture was reduced. Based on the efficacy coefficient method, the optimal content of regenerant is 8%. Regenerant are potential modifiers for cold recycled mixture that they can significantly improve the dynamic mechanical properties and durability.

Keywords: cold recycled mixture; emulsified asphalt; regenerant; performance; efficacy coefficient method (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2021
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
https://www.mdpi.com/2071-1050/13/13/7284/pdf (application/pdf)
https://www.mdpi.com/2071-1050/13/13/7284/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jsusta:v:13:y:2021:i:13:p:7284-:d:584787

Access Statistics for this article

Sustainability is currently edited by Ms. Alexandra Wu

More articles in Sustainability from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().