Ovidijus Šernas, Mantvydas Strumskys, Dovydas Skrodenis

Possibility of use of granite fines in asphalt pavements

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Abstract

The deposits of minerals in Lithuania are quite limited, also the mineral aggregates there are only low or average strength, such as sand, gravel and dolomite. High strength materials (granite) are imported from the east and north in narrow fraction and later on are processed into desirable fraction or mix. The fractionation process of large granite aggregates leaves huge amount of secondary product – granite fines. So the problem of appliance or utilization of this filler emerges. One of the possibilities could be the use of granite fines in asphalt pavements. In this study, a laboratory investigation was conducted on the physical and mechanical properties of asphalt mix reliant of mineral filler type. The asphalt mix physical and mechanical properties were carried out using maximum density of asphalt mix test, bulk density of bituminous specimens test, void characteristic of bituminous specimens test, Marshall test, indirect tensile strength test, wheel tracking test. Also, according to the results of laboratory testing, the possible ways and tendencies of use of granite fines in asphalt pavements are projected.

Keywords: Mineral filler; granite fines; Marshall test; indirect tensile strength test; wheel tracking test.