Abstract
This study aimed to evaluate the permanent deformation and aging conditions of BatuPahat soft clay–modified asphalt mixture, also called BatuPahat soft clay (BPSC) particles; these particles are used in powder form as an additive to hot-mix asphalt mixture. In this experiment, five percentage compositions of BPSC (0%, 2%, 4%, 6%, and 8%) by weight of bitumen were used. A novel design was established to modify the hot-mix asphalt by using the Superpave method for each additive ratio. Several laboratory tests evaluating different properties, such as indirect tensile strength, resilient stiffness modulus, and dynamic creep, was conducted to assess the performance of the samples mixed through the Superpave method. In the resilient modulus test, fatigue and rutting resistance were reduced by the BPSC particles. The added BPSC particles increased the indirect tensile strength. Among the mixtures, 4% BPSC particles yielded the highest performance. In the dynamic creep test, 4% BPSC particles added to the unaged and short-term aged specimens also showed the highest performance. Based on these results, our conclusion is that the BPSC particles can alleviate the permanent deformation (rutting) of roads.
Highlights
MATEC Web of Conferences additives for modified asphalt mixtures have been used to change the formation stage and to improve the engineering properties of asphalt mixtures [7].Oxidative aging is the reaction of oxygen with an asphalt binder; the rate of this reaction depends on the characteristics of the asphalt binder and temperature [8]
This study aimed to evaluate the permanent deformation and aging conditions of BatuPahat soft clay–modified asphalt mixture, called BatuPahat soft clay (BPSC) particles; these particles are used in powder form as an additive to hot-mix asphalt mixture
IConCEES 2015 resilient modulus at 25 °C corresponds to the resistance of the mixture to fatigue; by contrast, the resilient modulus at 40 °C displays the resistance of the mixture to rutting
Summary
Oxidative aging is the reaction of oxygen with an asphalt binder; the rate of this reaction depends on the characteristics of the asphalt binder and temperature [8]. Oxidation and volatilization cause asphalt pavements to retreat by increasing the stiffness of the binder, by enhancing the sensitivity to cracking, and by adversely affecting the structural performance of pavements [9]. The severity of aging among different asphalts can evaluated using different parameters [11]. Unmodified binders in pavements commonly harden and oxidize to a grade that exceeds the generally acceptable specifications of pavement aging [12]. The effect of long-term aging on the pavement depends largely on the properties of the materials constituting the asphalt mixture [14]. Pavement aging should be investigated to help enhance the design of durable flexible pavements on the basis of mechanistic–empirical principles [6]
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
