Hitomi ISHIDA
A fundamental study on Rice method for determining theoretical maximum density of asphalt mixtures
Osamu TAKAHASHI
A theoretical maximum density of asphalt mixtures has been determined by calculation method based on specific gravities of the mixture ingredients and their mixing percentages, or by direct measurement method using Rice method. Japanese pavement engineers use the calculation method on a process of mixture design, whereas U.S. or Canadian pavement engineers commonly use Rice method. Japanese pavement engineers should discuss rational aspects and test procedures on Rice method.
This study evaluated test procedures of Rice method standardized AASHTO, and investigated a difference between theoretical maximum densities determined by calculation method and Rice method. The following findings were obtained form the study.
a)Test procedures and test conditions of Rice method standardized AASHTO are valid for Japanese asphalt mixtures.
b)The difference between theoretical maximum densities is about 0.03g/cm3. It is equivalent to a difference of 1% in air void.
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