Red mud is a solid residue that results when bauxite ore is processed to obtain alumina (aluminum oxide –Al2O3), the main chemical compound to produce aluminum. Brazil has a wide reserve of bauxite in Pará State and the ore is processed in large scale. However, in the country red mud is stored inadequately in the environment. Pará is situated in northern region of Brazil and presents high temperature throughout the year. The elevated traffic volume and the high temperatures contributed to the early appearing of defects in the flexible asphalt pavement surfaces. This laboratory study aims the introduction of the red mud as filler in dense asphalt mixtures to improve the permanent deformation resistance. Asphalt mixtures with 3%, 5% and 7% of red mud (range between 0.02 to 2,800 micrometers) were produced. A conventional mixture with 7% stone powder filler (maximum diameter of 0.075 mm) was used as reference. Permanent deformation resistance of the mixtures was evaluated through French Rutting Tester. As a result, the mixture with 5% red mud presented better resistance that obtained at 30,000 cycles, 3.5% of rutting percentage depth. The asphalt mixtures with red mud presented good performance, with reduction of the permanent deformation of 12.63 to 42.62% in relation to reference mixture. Red mud as filler in asphalt mixtures is a viable option to reuse this waste, as well as being an environmentally friendly alternative.


    Access

    Download


    Export, share and cite



    Title :

    Mechanical feasibility of using red mud as filler in asphalt mixtures to improve permanent deformation




    Publication date :

    2020




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    Unknown





    Assessing Permanent Deformation Resistance of High Modulus Asphalt Mixtures

    Capitao, S. D. / Picado-Santos, L. | British Library Online Contents | 2006



    Permanent Deformation Model Based on Shear Properties of Asphalt Mixtures

    Li, Qiang / Lee, Hyun Jong / Lee, Sang Yum | Transportation Research Record | 2011


    Fatigue and Permanent Deformation Models for Polymer-Modified Asphalt Mixtures

    Khattak, Mohammad J. / Baladi, Gilbert Y. | Transportation Research Record | 2001