Road Materials and Pavement Design ( IF 3.4 ) Pub Date : 2021-08-02 , DOI: 10.1080/14680629.2021.1957000 Mohamed Mounir Boussabnia 1 , Daniel Perraton 1 , Sebastien Lamothe 1 , Hervé Di Benedetto 2 , Charles Neyret 3 , Alan Carter 1 , Bertrand Pouteau 4 , Marc Proteau 5
The fatigue's behaviour of bituminous materials is affected by the loading frequency. For hot mix asphalt (HMA) with unmodified bitumen, previous research showed a decrease in fatigue life, under strain-control mode, by increasing loading frequency. However, the effect of loading frequency on polymer-modified HMA has not been investigated extensively and researchers have found opposite results using the same testing method in strain-controlled mode. This paper looks at how the loading frequency impacts Wöhler's law parameters (slope and intercept) of a high modulus asphalt concrete (HMAC) made with a polymer-modified bitumen. Under strain-controlled mode, Tensile-Compression tests (TC) on cylindrical samples were carried out at isothermal conditions (θ = 10°C) and three distinct frequencies (5, 10 and 25 Hz). The analysis of covariance (ANCOVA) was considered to compare Wöhler's law parameters from different frequencies. The results showed no statistical difference in the slope and the intercept values from all studied frequencies.
中文翻译:
评估加载频率对高模量沥青混凝土 (HMAC) 的 Wöhler 曲线参数的影响
沥青材料的疲劳行为受加载频率的影响。对于未改性沥青的热拌沥青 (HMA),先前的研究表明,在应变控制模式下,通过增加加载频率会降低疲劳寿命。然而,加载频率对聚合物改性 HMA 的影响尚未得到广泛研究,研究人员在应变控制模式下使用相同的测试方法发现了相反的结果。本文着眼于加载频率如何影响由聚合物改性沥青制成的高模量沥青混凝土 (HMAC) 的 Wöhler 定律参数(斜率和截距)。在应变控制模式下,在等温条件下(θ = 10°C)和三个不同的频率(5、10 和 25 Hz)。协方差分析 (ANCOVA) 被认为是比较不同频率的 Wöhler 定律参数。结果显示所有研究频率的斜率和截距值没有统计学差异。