Performance Improvement of Dune Sand Asphalt Concrete With Two Different Types of Fillers

Abstract

This paper shows the results of an experimental study aboutthe contribution to the valorization of dune sands in hot mix asphaltin road pavements. Toward compensate for the lack of filler in dune sands, fivemixtures were improved by two types of filler: limestone filler and crushed dune sand.The experimental testing plancomprisesMarshall test, moisture sensitivity and uniaxial tension test. The addition of crushed dune sand and limestone fines to hot mix asphalt based in dune sand has a positive effect. The results of the tests show that the mixtures with of crushed dune sand give better characteristic than the mixtures with limestone filler.