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POLYMERIC THERMOCHROMIC MATERIAL FOR IMPROVEMENT OF ASPHALT PAVEMENT DURABILITY

hu, jianying
http://rave.ohiolink.edu/etdc/view?acc_num=case1458728010

Abstract Details

2016, Doctor of Philosophy, Case Western Reserve University, Civil Engineering.
Asphalt pavements feature good performance and relatively low construction and maintenance costs. However, the black color of asphalt binder implies that the sunlight is not reflected but absorbed, which raises the temperature of the asphalt pavement and impairs its long-term durability. Conventional cool pavement technologies reduce the surface temperature of roads regardless of season. These technologies, however, have detrimental negative impacts during the winter season. An innovative strategy presented in this dissertation is to use innovative thermochromic material to develop thermochromic asphalt binders with desirable solar reflectance, i.e., they reflect more solar energy at high temperature and reflect less solar energy at low temperature. Thermochromic materials are substances that can reversibly change their colors in response to temperature. Comparison measurements have found that the surface temperature of thermochromic asphalt binder is lower than that of the conventional asphalt binder with maximum decrease as high as 6.6 °C during typical summer day in the northeast U.S. (i.e. Cleveland, OH). This helps to improve its resistance to high temperature related performance degradation (such as rutting, fatigue, etc), and mitigate urban heat island effects. Besides the cooling effects, study showed that the surface temperature of thermochromic asphalt was higher than regular asphalt under low temperature. This means thermochromic asphalt can delay ice formation on the surface of road, which is an important potential benefit for road safety in cold regions. The thermal, optical, mechanical, pyrolytical, and chemical properties of the thermochromic asphalt binders were characterized. Superpave binder grading was assigned to the thermochromic binders. Experiments were also conducted to assess the performance of hot mix asphalt (HMA) with thermochromic asphalt binders. The results from the mechanical experiments indicated that thermochromic HMA can achieve satisfactory performance. The thermal performance of the thermochromic HMA was evaluated from long-term field exposure. The results indicated that the effectiveness of the thermochromic HMA could sustain after long term exposure. The dissertation conducted a study to gauge the potential of thermochromic asphalt concrete to improve the durability of the pavement, reduce the environmental impacts, and mitigate ice related safety issues on the road. This demonstrates innovation for development of sustainable and environmental benign infrastructure.
Xiong Yu (Advisor)
Xiangwu Zeng (Committee Member)
Adel S. Saada (Committee Member)
Eric Baer (Committee Member)
Roger H. French (Committee Member)
235 p.
Civil Engineering
Thermochromic material, asphalt pavement, durability, solar reflectance

Recommended Citations

Citations

  • hu, J. (2016). POLYMERIC THERMOCHROMIC MATERIAL FOR IMPROVEMENT OF ASPHALT PAVEMENT DURABILITY [Doctoral dissertation, Case Western Reserve University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=case1458728010

    APA Style (7th edition)

  • hu, jianying. POLYMERIC THERMOCHROMIC MATERIAL FOR IMPROVEMENT OF ASPHALT PAVEMENT DURABILITY. 2016. Case Western Reserve University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=case1458728010.

    MLA Style (8th edition)

  • hu, jianying. "POLYMERIC THERMOCHROMIC MATERIAL FOR IMPROVEMENT OF ASPHALT PAVEMENT DURABILITY." Doctoral dissertation, Case Western Reserve University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=case1458728010

    Chicago Manual of Style (17th edition)

case1458728010
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© 2016, all rights reserved.
This open access ETD is published by Case Western Reserve University School of Graduate Studies and OhioLINK.