Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Sensitivity analysis of complex shear modulus using Hirsch model
Abstract The present work evaluates the factors that affecting estimation of the Complex Shear Modulus (G*) of a binder when this estimation is done through an indirect approach: the Hirsch model. This technique consists of (i) testing specimens for dynamic modulus (E*) and (ii) back calculating the G* using the Hirsch model. To this purpose, four virgin asphalt binders were performance-graded with frequency sweeps to determine the appropriate properties. The data obtained from the laboratory tests were used in the Hirsch model for E* prediction. Subsequently, the Bulk Specific Gravity (Gsb) and G* were altered to determine the sensitivity of the Hirsch model to these estimations in terms of E*. Finally, the Gsb was altered, and the G* was estimated. The results showed that the estimation of G* presents more reproducibility for higher temperatures and lower frequencies. In conclusion, the estimation G* in hot mix asphalt designs using the Hirsch model is a promising alternative.
Sensitivity analysis of complex shear modulus using Hirsch model
Abstract The present work evaluates the factors that affecting estimation of the Complex Shear Modulus (G*) of a binder when this estimation is done through an indirect approach: the Hirsch model. This technique consists of (i) testing specimens for dynamic modulus (E*) and (ii) back calculating the G* using the Hirsch model. To this purpose, four virgin asphalt binders were performance-graded with frequency sweeps to determine the appropriate properties. The data obtained from the laboratory tests were used in the Hirsch model for E* prediction. Subsequently, the Bulk Specific Gravity (Gsb) and G* were altered to determine the sensitivity of the Hirsch model to these estimations in terms of E*. Finally, the Gsb was altered, and the G* was estimated. The results showed that the estimation of G* presents more reproducibility for higher temperatures and lower frequencies. In conclusion, the estimation G* in hot mix asphalt designs using the Hirsch model is a promising alternative.
Sensitivity analysis of complex shear modulus using Hirsch model
Padula, Flávio R. G. (Autor:in) / Nicodemos, Sidney (Autor:in) / Mendes, Júlia C. (Autor:in) / Willis, Richard (Autor:in)
International Journal of Pavement Research and Technology ; 12 ; 125-130
01.03.2019
6 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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