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http://dx.doi.org/10.7473/EC.2014.49.2.134

Study on Polymer-Modified Self-Healing Asphalt  

Yang, Dong-Geon (Department of Polymer Engineering, The University of Suwon)
Yoo, Pyeong-Jun (Highway Research Division, Korea Institute of Construction Technology)
Hong, Young-Keun (Department of Polymer Engineering, The University of Suwon)
Publication Information
Elastomers and Composites / v.49, no.2, 2014 , pp. 134-143 More about this Journal
Abstract
Polymers are introduced to neat asphalt to prepare self-healing asphalt. The polymers are Surlyn, Nylon and polyethyleneterephtalate(PET). Since they are known as having high intermolecular force, they have high processing temperature. Therefore they are hardly introduced into the asphalt as bulk state. So in this study, they are introduced as solutions. Polymer-modified asphalts showed excellent modification effect and also healing effect. 5% polymer added asphalt showed more than 18% increased tensile strength. This tensile strength increment can be explained by polymer's intermolecular forces. Especially Surlyn interacts with asphalt molecules by hydrogen bonding and also with metals in asphalt by ionic bonding. When it comes to healing aspect the healing efficiency of Surlyn increased to 138% based on tensile strength. That of PET increased to 141% based on complex modulus and in case of Nylon it increased to 131% based on impact strength. This tells that in dealing with healing efficiency the important considering factors are not only the intermolecular forces of the polymers but also the interaction between the polymer and asphalt molecules.
Keywords
self-healing; crack repairing; asphalt; Surlyn; Nylon; PET; healing efficiency;
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