Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Mechanical Response of Asphalt Mixtures Modified with Natural Wax
The main objective of the research was to modify Colombian asphalts with natural waxes to produce warm mix asphalt and determine their mechanical and dynamic properties. The mixtures evaluated correspond to the md-10 and md-12 gradation curves, as defined in the specifications of the Urban Development Institute (IDU) of Bogota. The first step of the research comprised materials characterization (i.e., granular aggregate, asphalt, and natural waxes) and the determination of the wax and asphalt optimal percentages to be added to the mixes. Afterward, the warm-mixed asphalt mixtures were prepared and compacted at different temperature levels (i.e., 110, 130, and 150 °C) to evaluate the effect of modified asphalt in their mechanical and dynamic response. The resilient moduli (RM), preserved strength, and indirect tensile strength (ITS) tests were used to determine the asphalt mixture properties. The results showed that the use of natural waxes reduces the asphalt viscosity and, therefore, decreases the mixtures' production and compaction temperatures, which significantly reduces the energy consumption during the production process. Finally, based on the test results, the mechanical and dynamic properties of the modified asphalt mixtures with waxes are similar to those of conventional mixtures, which allows for establishing their feasibility for implementation and practical use.
Mechanical Response of Asphalt Mixtures Modified with Natural Wax
The main objective of the research was to modify Colombian asphalts with natural waxes to produce warm mix asphalt and determine their mechanical and dynamic properties. The mixtures evaluated correspond to the md-10 and md-12 gradation curves, as defined in the specifications of the Urban Development Institute (IDU) of Bogota. The first step of the research comprised materials characterization (i.e., granular aggregate, asphalt, and natural waxes) and the determination of the wax and asphalt optimal percentages to be added to the mixes. Afterward, the warm-mixed asphalt mixtures were prepared and compacted at different temperature levels (i.e., 110, 130, and 150 °C) to evaluate the effect of modified asphalt in their mechanical and dynamic response. The resilient moduli (RM), preserved strength, and indirect tensile strength (ITS) tests were used to determine the asphalt mixture properties. The results showed that the use of natural waxes reduces the asphalt viscosity and, therefore, decreases the mixtures' production and compaction temperatures, which significantly reduces the energy consumption during the production process. Finally, based on the test results, the mechanical and dynamic properties of the modified asphalt mixtures with waxes are similar to those of conventional mixtures, which allows for establishing their feasibility for implementation and practical use.
Mechanical Response of Asphalt Mixtures Modified with Natural Wax
Reyes-Ortiz, Oscar J. (Autor:in) / Fuentes, Luis G. (Autor:in) / Alvarez, Allex E. (Autor:in)
Geo-Hubei 2014 International Conference on Sustainable Civil Infrastructure ; 2014 ; Yichang, Hubei, China
23.06.2014
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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