Advances and Applications in Statistics
Volume 51, Issue 6, Pages 427 - 444
(December 2017) http://dx.doi.org/10.17654/AS051060427 |
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A STATISTICAL STUDY ON THE VARIABILITY OF AGGREGATE CHARACTERISTICS OF ASPHALT MIXTURES
Saeed Maghsoodloo, Randy West and Dilcu Barnes
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Abstract: In the design of asphalt paving mixtures, aggregates from the stockpiles are blended at selected proportions to satisfy specified gradation ranges. In a laboratory environment, the mix designer controls the proportion from each stockpile so that the proportions (or weights) can be assumed fixed. This is unlike in a plant operation where aggregates are fed from bins into a mixing-drum so that the proportion of each aggregate, from each bin is a random variable. Statistical analyses of the former case are well-known and are first repeated in Sections 2 and 3. The objective of this article is to provide statistical information for the case when aggregate proportions are treated as random variables. The formulas in Section 4 provide the reader with a method of calculating approximate first two moments of asphalt paving mixture characteristic treated as random variables witnessed in plant operations. |
Keywords and phrases: statistical properties, asphalt mixtures, expected value, variance. |
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