TITLE:
Improving Rutting Resistance of Flexible Pavement Using Geosynthetics
AUTHORS:
Ahmed Ebrahim Abu El-Maaty
KEYWORDS:
Flexible Pavement, Geosynthetics, Deformation, Base Course
JOURNAL NAME:
Open Access Library Journal,
Vol.3 No.5,
May
23,
2016
ABSTRACT: Unbound base layers deform under load and contribute to the accumulation
of ruts. Therefore, this study was concerned with studying the effect of
reinforcement on the behavior of unbound granular material that used in flexible
pavement layers as a base course. Two main geothynthetic types were used in
this study. These types were woven geotextile and geogrid. Two geogrid opening
sizes were used (GR105 and GR420). The experimental work was designed to
evaluate plastic and elastic deformation and the modulus of elasticity of
reinforced limestone base course. This experimental work carried out utilizing
the static plate loading test in a test-model which simulated the subgrade and
base course of the flexible pavement. The effect of base thickness, geogrid
depth, modulus of elasticity of base course and geogrid edges fixation on the
deformation characteristics were studied. Furthermore, the effect of loading
time on the accumulated deformation was investigated. Moreover, the effect of
reinforcement on base thickness saving (BCR) and deformation reduction ratio
(DRR) was studied. A great influence for reinforcement especially with geogrid
(GR420) was observed in improving the deformation characteristics of base
course.