Investigating the Effect of Various Fillers on Cohesive Failure Mechanism in Asphalt Mixtures

  • Gholam Hossein Hamedi ORCID
    Affiliation

    Department of Civil Engineering, Faculty of Engineering, University of Guilan, P. O. B. 3756, Rasht, Iran

  • Mohsen Sohrabi
    Affiliation

    Department of Civil Engineering, Faculty of Engineering, Urmia University, P. O. B. 165, Urmia, Iran

  • Farhad Sakanlou
    Affiliation

    Department of Civil Engineering, Faculty of Engineering, Urmia University, P. O. B. 165, Urmia, Iran

  • Seyed Amid Tahami
    Affiliation

    Department of Civil and Environmental Engineering, University of Texas at San Antonio, P. O. B. 78712, TX 78249 San Antonio, United States of America

Abstract

In the current research attempts have been made to investigate the effect of various fillers on the resistance to mastic failure using mechanical and thermodynamic methods. Two types of granite and limestone aggregates with acidic and basic characteristics were used, respectively. Besides, four types of filler including calcium carbonate, hydrated lime, Portland cement and stone powder and two types asphalt binder PEN 60-70 and PEN 85-100 were used. Calcium carbonate and hydrated lime had the most effect and Portland cement and stone powder had the least effect on strength reduction. In addition, the results obtained by modified Lottman test showed that the use of hydrated lime and calcium carbonate increased resistance to moisture damage. The results of correlation coefficients show the necessity of using the effect of filler on cohesion free energy calculation in the surface free energy to investigate cohesion failure in different asphalt mixtures.

Keywords: asphalt mixtures, moisture damage, cohesion free energy, filler, pull off tensile strength, indirect tensile strength
Published online
2020-01-17
How to Cite
Hamedi, G. H., Sohrabi, M., Sakanlou, F., Tahami, S. A. “Investigating the Effect of Various Fillers on Cohesive Failure Mechanism in Asphalt Mixtures”, Periodica Polytechnica Civil Engineering, 64(1), pp. 144-155, 2020. https://doi.org/10.3311/PPci.14505
Section
Research Article