Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Prediction of Tensile Strength of Asphalt Concrete
Durable and sustainable asphalt pavements require high-quality asphalt materials. In pavement design, the tensile strength of asphalt concrete is a fundamental engineering property. Due to the characteristics of bitumen, the tensile strength is a function of temperature and loading rate. In the past, some regression equations were developed to predict the tensile strength of asphalt concrete. However, these equations are only valid for narrow temperature and strain rate ranges and do not relate to the material properties. This paper proposes a new general equation for the prediction of the tensile strength, which is based on tension tests performed at different test conditions and relates to the complex modulus of the bitumen. By means of the Dynamic Shear Rheometer (DSR), frequency sweeps were done to obtain a master curve for the complex modulus of the bitumen. Uniaxial tensile strength (UTS) tests were conducted to get the tensile strength of the asphalt mixture at different temperatures and loading rates, respectively. In this paper, an S-shaped prediction curve is used to link the tensile strength of the mixture and complex modulus of the bitumen to each other. The test results indicate that the proposed prediction model has a low relative error, which means that it gives a realistic description for the tensile strength of an asphalt mixture.
Prediction of Tensile Strength of Asphalt Concrete
Durable and sustainable asphalt pavements require high-quality asphalt materials. In pavement design, the tensile strength of asphalt concrete is a fundamental engineering property. Due to the characteristics of bitumen, the tensile strength is a function of temperature and loading rate. In the past, some regression equations were developed to predict the tensile strength of asphalt concrete. However, these equations are only valid for narrow temperature and strain rate ranges and do not relate to the material properties. This paper proposes a new general equation for the prediction of the tensile strength, which is based on tension tests performed at different test conditions and relates to the complex modulus of the bitumen. By means of the Dynamic Shear Rheometer (DSR), frequency sweeps were done to obtain a master curve for the complex modulus of the bitumen. Uniaxial tensile strength (UTS) tests were conducted to get the tensile strength of the asphalt mixture at different temperatures and loading rates, respectively. In this paper, an S-shaped prediction curve is used to link the tensile strength of the mixture and complex modulus of the bitumen to each other. The test results indicate that the proposed prediction model has a low relative error, which means that it gives a realistic description for the tensile strength of an asphalt mixture.
Prediction of Tensile Strength of Asphalt Concrete
Li, N. (Autor:in) / Molenaar, A. A. A. (Autor:in)
Second International Conference on Sustainable Construction Materials: Design, Performance, and Application ; 2012 ; Wuhan, China
Sustainable Construction Materials 2012 ; 276-288
13.12.2012
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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