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Properties and Microcosmic Mechanism of Coral Powder Modified Asphalt in Offshore Islands and Reefs Construction

Author

Listed:
  • Yi Chen

    (School of Highway, Chang’an University, South Erhuan Middle Section, Xi’an 710064, China
    Road and Bridge School, Zhejiang Institute of Communications, No. 1515, Moganshan Road, Hangzhou 311112, China)

  • Bingjie Fang

    (School of Civil and Transportation Engineering, Hebei University of Technology, 5340 Xiping Road, Beichen District, Tianjin 300401, China)

  • Haixiao Hu

    (Shandong Provincial Communications Planning and Design Institute Group Co., Ltd., No. 2177 Tianchen Road, Jinan 250101, China)

  • Fangyuan Gong

    (School of Civil and Transportation Engineering, Hebei University of Technology, 5340 Xiping Road, Beichen District, Tianjin 300401, China)

  • Xuejiao Cheng

    (School of Civil and Transportation Engineering, Hebei University of Technology, 5340 Xiping Road, Beichen District, Tianjin 300401, China)

  • Yu Liu

    (School of Highway, Chang’an University, South Erhuan Middle Section, Xi’an 710064, China)

Abstract

The application of waste coral fragments from natural weathering, harbor construction and channel excavation to infrastructure construction on offshore islands can help alleviate the problems of shortage of traditional materials, land use of waste materials, and long-distances transport. In order to promote the comprehensive application of coral materials in road engineering construction on offshore islands, and to develop road pavement materials with good service performances and economic and environmental benefits, this paper studies the base properties, high-temperature rheological properties, and microstructure of coral powder (CP) modified asphalt through indoor experiments. The base properties tests (penetration, softening point and ductility) showed that the incorporation of CP increased the stiffness and high-temperature stability of the asphalt, but decreased the ductility of the asphalt. The optimal dosing of CP in virgin asphalt (VA) and styrene-butadiene-styrene-modified asphalt (SA) is 12% and 15%, respectively. The results of viscosity and high-temperature rheology tests showed that the right amount of CP could improve the high-temperature rheological properties and resistance to permanent deformation of asphalt, but superfluous CP tends to have a negative effect. Microscopic test results show that in the recommended dosage, the combination effect of CP and asphalt is better. CP-modified asphalt is mainly based on physical modification.

Suggested Citation

  • Yi Chen & Bingjie Fang & Haixiao Hu & Fangyuan Gong & Xuejiao Cheng & Yu Liu, 2023. "Properties and Microcosmic Mechanism of Coral Powder Modified Asphalt in Offshore Islands and Reefs Construction," Sustainability, MDPI, vol. 15(16), pages 1-20, August.
    • Handle: RePEc:gam:jsusta:v:15:y:2023:i:16:p:12393-:d:1217574
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    References listed on IDEAS

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    1. Yuchen Guo & Xuancang Wang & Guanyu Ji & Yi Zhang & Hao Su & Yaolu Luo, 2021. "Effect of Recycled Shell Waste as a Modifier on the High- and Low-Temperature Rheological Properties of Asphalt," Sustainability, MDPI, vol. 13(18), pages 1-23, September.
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