Clogging Behaviour of OGFC Mixes
Open Graded Friction Course (OGFC) mix is an open graded Hot Mix Asphalt (HMA) mixture having high
surface drainability and is recommended for high-speed, high-volume road-corridors in many countries around the world for
easy drainage during rainfall. The performance life of OGFC depends mainly upon its permeability. Clogging of voids in the
OGFC is one of the main causes of deterioration of performance and durability of the mixture. This paper presents the results
of an experimental study on clogging behavior of OGFC mixes when a Clogging Material (CM) is added to clog the pores,
by conducting Falling head permeability tests.
Index terms- OGFC, Clogging, Permeability, Hot Mix Asphalt.