Is Normal Distribution the Most Appropriate Statistical Distribution for Volumetric Properties in Asphalt Mixtures?
Yiqiu, Tan Professor, Department of Transportation Science and Engineering, Harbin Institute of Technology, Huining, Xu PhD candidate, Department of Transportation Science and Engineering, Harbin Institute of Technology, Xiaomin, Li Senior Engineer, Gansu Provincial Communications Planning Survey and Design Institute, (Received 7 January 2009; accepted 30 April 2009) Abstract Volumetric properties are essential for a better understanding of how to design the mixtures. Due to the irregularity of aggregate shape, these properties vary randomly with the same gradation. In this paper, the volumetric properties [bulk specific gravity (γf), air voids (VV), voids in mineral aggregate (VMA), and voids filled with asphalt (VFA)] were determined on two mixtures types, namely, A and B. These mixtures were statistically analyzed using different distribution methods. Seventy-two samples of Mixture A and 52 of Mixture B were fabricated using the Marshall design method. Results of the study showed th
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