Multi-Scale Decay Mechanism of Emulsified Asphalt Cold Recycled Mixture Under Freeze-Thaw-Reference-Cited by-同舟云学术

Multi-Scale Decay Mechanism of Emulsified Asphalt Cold Recycled Mixture Under Freeze-Thaw

Published:2023-09-26 Issue:3 Volume:18 Page:50-69
ISSN:1822-427X
Container-title:The Baltic Journal of Road and Bridge Engineering
language:
Short-container-title:BJRBE

Author:

Yang Yanhai¹^ORCID,Yue Liang¹^ORCID,Yang Ye²^ORCID,Chen Guanliang¹^ORCID

Affiliation:

1. School of Transportation and Geomatics Engineering, Shenyang Jianzhu University, Shenyang, China

2. School of Transportation and Geomatics Engineering, Shenyang Jianzhu University, Shenyang, China; College of Transportation Engineering, Dalian Maritime University, Dalian, China

Abstract

The road performance decay law of EACRM under freeze-thaw cycles was studied using laboratory tests on the macroscopic scale in order to comprehensively analyze the serious performance damage mechanism of emulsified asphalt cold recycled mixture (EACRM) in cold regions during the service period. The surface cracking behavior, internal void evolution characteristics, and asphalt mortar morphology damage of EACRM under freeze-thaw cycles were studied by means of digital speckle, industrial CT, and scanning electron microscope (SEM) on the mesoscopic and microscopic scale. The results show that along with the increase in the number of freeze-thaw cycles, the road performance of EACRM decreases significantly. The surface of EACRM obviously cracks, and the width and number of main cracks increase significantly. The fatigue times of the maximum horizontal strain in the whole field gradually decrease. Air voids and the average volume of meso-void visibly increase. The microcracks of cement-emulsified asphalt mortar constantly emerge at the interface. The serious damage of the “three-dimensional network structure” is the fundamental reason for the performance decay of EACRM in cold regions. The performance damage of EACRM in cold regions is aggravated by water seeping into voids from cracks. Eventually, EACRM shows serious freeze-thaw inflicted damage.

Funder

National Natural Science Foundation of China

Publisher

Riga Technical University

Subject

Building and Construction,Civil and Structural Engineering

Reference28 articles.

1. Cheng, Y., Yu, D., Tan, G., et al. (2019). Evolution on freeze-thaw damage of basalt fiber asphalt mixture. Journal of Harbin Engineering University, 40(3), 518−524.

2. Duojie, C., Si, W., Ma, B., Hu, Y., Liu, X., and Wang, X. (2021). Assessment of freeze-thaw cycles impact on flexural tensile characteristics of asphalt mixture in cold regions. Mathematical Problems in Engineering, 2021, Article 6697693. https://doi.org/10.1155/2021/6697693

3. Fan, Z., Xu, H., Xiao, J., and Tan, Y. (2020). Effects of freeze-thaw cycles on fatigue performance of asphalt mixture and development of fatigue-freeze-thaw (FFT) uniform equation. Construction and Building Materials, 242, Article 118043. https://doi.org/10.1016/j.conbuildmat.2020.118043

4. Gao, L., Ni, F., Braham, A., and Luo, X. (2014). Mixed-mode cracking behavior of cold recycled mixes with emulsion using Arcan configuration. Construction and Building Materials, 55, 415−422. https://doi.org/10.1016/j. conbuildmat.2013.12.079

5. Gong, X., Romero, P., Dong, Z., and Li, Y. (2017). Investigation on the low temperature property of asphalt fine aggregate matrix and asphalt mixture including the environmental factors. Construction and Building Materials, 156, 56−62. https://doi.org/10.1016/j.conbuildmat.2017.08.142