Browsing by Author "S. Maqbool"

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    Effect of fines content on dry and saturated indirect tensile strength of hot mix asphalt mixtures
    (Technical Journal, University of Engineering and Technology (UET) Taxila, Pakistan, 2015) S. Maqbool; A. H. Khan; A. Inam; T. Sultan; M. U. Rashid; M. A. Rizvi
    Fines and coarse aggregates play vital role in achieving strength properties of hot mix asphalt (HMA) mixtures. ASTM D 3515 recommends nine types of gradations combinations to be used for HMA with variable fractions of fines. In this research the effect of fines in these nine gradations of HMA were evaluated. HMA with variable fines contents were prepared in laboratory using gyratory compactor. The indirect tensile strength using Universal Testing Machine (UTM HYD-25-II) of original and moisture conditioned HMA samples were determined. Tensile strength ratio (TSR) of the HMA samples was also evaluated. It has been observed that with the increase in the fines content the strength and TSR of HMA samples initially increase then it decrease. The HMA mixes having low plastic fines (PI = 6) should not be exceeded beyond 10 % in order to achieve optimum strength.