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High-Temperature Rheological Properties of Crumb Rubber Composite Modified Asphalt

Author

Listed:
  • Fangyuan Gong

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

  • Weijie Lin

    (School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China
    Xiamen Longfor Dejia Real Estate Co., Ltd., Yongquan Industrial Park, Guankou Town, Jimei District, Xiamen 361000, China)

  • Zhenkan Chen

    (Guangzhou Communications Investment Group Operating Points Co., Ltd., Guangzhou 511434, China)

  • Tao Shen

    (Department of Infrastructure Construction, South China University of Technology, Guangzhou 510641, China)

  • Chichun Hu

    (School of Civil Engineering and Transportation, South China University of Technology, Guangzhou 510641, China)

Abstract

As a kind of environmentally friendly material, crumb rubber modified asphalt is widely used in highway engineering to accelerate the consumption of end-life tires. The objective of this study is to investigate the high-temperature rheological properties of crumb rubber composite modified (CRCM) asphalt. In this study, the same content of crumb rubber and different content of composite additives were added to prepare the CRCM asphalt, including CRCM-SBS, CRCM- Sasobit/BRF, and CRCM-RARX. The viscosity, phase angle, rutting factor, critical temperature, storage modulus, non-recoverable creep compliance, percent recovery, stress sensitivity, and the functional groups of all testing specimens were obtained by the rotational viscometer, dynamic shear rheometer, multiple stress creep recovery, and Fourier transform infrared spectroscopy tests to evaluate the high-temperature rheological properties of asphalt. In general, the results were favorable for enhancing the high-temperature performance and reducing the stress sensitivity of asphalt. It showed that the incorporation of crumb rubber and additives increased the viscosity of asphalt under different testing conditions. Additionally, the addition of crumb rubber and additives in the base asphalt could be used to increase elastic components and improve the permanent deformation resistance, and the performances are closely related to the types of additives. Thus, considering the high-temperature performance, the asphalt modified by crumb rubber and RARX additive was recommended to apply to asphalt pavement.

Suggested Citation

  • Fangyuan Gong & Weijie Lin & Zhenkan Chen & Tao Shen & Chichun Hu, 2022. "High-Temperature Rheological Properties of Crumb Rubber Composite Modified Asphalt," Sustainability, MDPI, vol. 14(15), pages 1-18, July.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:15:p:8999-:d:869056
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    References listed on IDEAS

    as
    1. Punyaslok Rath & Joshua E. Love & William G. Buttlar & Henrique Reis, 2019. "Performance Analysis of Asphalt Mixtures Modified with Ground Tire Rubber Modifiers and Recycled Materials," Sustainability, MDPI, vol. 11(6), pages 1-20, March.
    Full references (including those not matched with items on IDEAS)

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