Characterization of Asphalt Mixtures in Qatar
Abstract
The State of Qatar went through a massive road construction program in the last decade
as part of the ongoing development of its infrastructure and road transport network.
Construction of roads in Qatar generally utilizes imported materials such as aggregate
and binders as a result of the scarcity of local construction materials. Characteristics
of asphalt mixtures are studied in this research program in order to evaluate mixtures
properties in terms of aggregate packing, binder content, voids, mixture density, maximum
density and Marshall Stability. Actual mixtures used in the Public Works Authority road
projects were analyzed in the research program. Mixtures were prepared following the
Qatar Construction Specifications (QCS, 2014). Combined aggregate gradations for
different asphalt mixtures were compared with maximum density envelopes for different
maximum aggregate sizes. Moreover, regression analysis was used to evaluate the
strength of correlations established between different asphalt mixtures properties. The
analysis of these mixtures is outlined in terms of general characteristics and consequently,
recommendations are given to improve asphalt mixtures performance.
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- Theme 2: Materials and Transportation Engineering [43 items ]