doi:10.3850/978-981-08-7920-4_S1-C09-cd
Evaluation of Construction Limestone Aggregate Sourced in the Northern Part of Jordan using Superpave Tests
Ghazi Al-Khateeb, Turki Obaidat and Taisir Khedaywi
Jordan University of Science and Technology, Irbid, Jordan.
ABSTRACT
SUPERPAVE is an acronym that stands for SUperior PERforming asphalt PAVEments. Superpave
system is the outcome of a 5-year, $150 million research program (the Strategic Highway
Research Program or SHRP) that was conducted during the time period of 1987–1992 in
the United States (US) to enhance the performance of asphalt pavements. Superpave system
developed and used tests for consensus and source aggregate properties to improve their
specifications and criteria. Limestone aggregate sourced in the northern part of Jordan was
evaluated according to the Superpave tests. Therefore, the study aimed at evaluating the
limestone aggregate for Superpave consensus and source aggregate properties to investigate the
suitability of this type of aggregate for construction of highway pavements in Jordan. Limestone
is considered themost common aggregate type that is used for pavement construction in Jordan.
The Superpave tests for consensus properties used to evaluate the aggregate included: coarse
aggregate angularity (CAA), flat and elongated (F&E) particles, fine aggregate angularity (FAA),
and sand equivalent (SE) tests. In addition, other tests for source aggregate properties including:
Los Angeles (LA) abrasion, specific gravity and absorption of coarse aggregate, specific gravity
and absorption of fine aggregate, and deleterious materials tests were used in the evaluation.
Basalt aggregate was also used in this study for comparison with the limestone aggregate.
Basalt aggregate exists heavily in the eastern part of Jordan. In the last few years, due to the
high abrasion value for the currently-used limestone aggregate that leads to polished pavement
surface, highway agencies in Jordan started to use basalt for the construction of highway
pavements to improve skid resistance and reduce pavement rutting.
Keywords: Superpave, Limestone, Basalt, Consensus Properties, Source Properties, Construction.
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