Gilsonite acts as an enhancement to the quality of the asphalt mix, the presence of sulfur compounds in Gilsonite has the effect of asphalt resistance. Modified asphalt by Gilsonite is stronger, more tight, more adhesive, and easily mixed with asphalt without the need for high roller strength , In contrast to other modifiers, is mixed.
Modified asphalt by Gilsonite has higher strength, less deformation, higher softness point, water resistance higher than other modified asphalt with other modifiers, and in whole or in part, or as a supplement in terms of value and price. It can replace the “SBS“ polymers in asphalt modifiers.
Flexible pavement surfaces are composed of two major components; bitumen and aggregates. Cohesion in flexible
pavement mixtures is provided by the bituminous binders whereas the aggregates provide the internal shear strength and the stability of the mixture.
Bitumen binders also bind the aggregate particles together preventing their breakdown under the traffic load as well as providing driving comfort by providing smooth surfaces. Additionally, they increase the stability of the mixture through cohesion and enabling its impermeability by filling in the voids in the mixture.
Although bituminous binders are used in pavement mixtures in as low amounts as 5-7% by weight, they have a significant effect on the mixture performance .
In the hot mix asphalts (HMAs) used in the flexible pavements of highways, various deformations such as permanent deformation, moisture damage and cracks due to low temperature and fatigue regularly occur.
The modifiers that can be added into the bituminous binder as well as into the mixture directly is Gilsonite.
Gilsonite enhances the resistance of HMAs against deformation and thus improve the pavement’s performance and extend its service life.
Gilsonite improve the pavement stability and have many other benefits;