الفهرس 
LITERATURE REVIEWOnly 14 pages are availabe for public view
 |  | from | 142 |  |  |
| | | from | 142 | | |
Abstract
The performance of bituminous concrete pavement
depends largely on the properties of mineral aggregates
which are commonly composed of coarse aggregate. fine
aggregate, and mineral filler. Mineral aggregates vary
widely in their mineralogical, granulometric, strength
surface texture, and shape characteristics. These properties
are usually evaluated to determine the suitabi-
lity of mineral aggregates for ~se in bituminous mixtures.
One of the major sources of road making aggregates
is the crushed rock aggregate which is prepared by quarrying
natural rock from quarries having materials of acceptable
propeFties and crushing it to the required size.
In the majority of these quarries, the fresh rock
is capped by an overburden of partially decomposed rock.
In addition, decomposition may penetrate into cracks and
joints in sound rock, which may alsQ be traversed by veins
of rock of inferior quality. Decomposed or inferior rock
may find its way into the crushers, which cannot be easily
eliminated - 2 -
In Egypt, ”Abu-Zaabal” basaltic quarries are extensively
used in attaining coarse basaltic aggregates for
road construction. Decomposed quarries surface materials
were found with fresh basalt after the crushing operations.
The properties of these decomposed materials, as well as
their effect on engineering properties of hot bituminous
mixt~res, were not clearly evaluated and fully understood.
This research has been initiated, first, to determine
the different properties of the decomposed quarries
surface materials and, secondly, to evaluate their effect
on the engineering properties of hot road tar mixtures.
The study covers a review of the available related
literature. Experimental work has been conducted to deter-
mine the different properties of the quarries surface materials.
The mineralogical and chemical composition of the
quarries surface materials have been studied.
The specific gravity, water absorption, and strip-
ping resistance of the quarries surface materials have been
determined.- 2 -
In Egypt, ”Abu-Zaabal” basaltic quarries are extensively
used in attaining coarse basaltic aggregates for
road construction. Decomposed quarries surface materials
were found with fresh basalt after the crushing operations.
The properties of these decomposed materials, as well as
their effect on engineering properties of hot bituminous
mixt~res, were not clearly evaluated and fully understood.
This research has been initiated, first, to determine
the different properties of the decomposed quarries
surface materials and, secondly, to evaluate their effect
on the engineering properties of hot road tar mixtures.
The study covers a review of the available related
literature. Experimental work has been conducted to deter-
mine the different properties of the quarries surface materials.
The mineralogical and chemical composition of the
quarries surface materials have been studied.
The specific gravity, water absorption, and strip-
ping resistance of the quarries surface materials have been
determined.