| OBJECTIVE : |
In
order to maximize their performance, hot mix asphalt (HMA) pavements must
be constructed with adquate field density and relatively impermeable to
moisture. Permeability is an important factor that affects
the performance of Superpave pavements. Superpave stands for SUperior PERforming
asphalt PAVEments. Percolation of water, through the interconnected voids
of an asphalt pavement causes stripping of the asphalt-bound layer as well
as deterioration of the foundation layers of the roads. It
is a fact that the life of a permeable pavement would be shorter than that
of an impermeable pavement. Recent experiences in different states including
Kansas show that mixtures with higher air voids and larger stone sizes
can cause excessive permeability of the Superpave pavements. Recent experiences
in different states including Kansas show that mixtures with higher air
voids and larger stone sizes can cause excessive permeability of the Superpave
pavements. The main objective of this study was to identify different factors
that affect the permeability of Superpave mixtures in Kansas and suggest
remedies to lower the permeability of these mixtures, thereby increasing
potential service life of these roads. |
