Evaluation of Compressive Strength of Asphalt Mixture from Marshall Stability and Indirect Tensile Strength

This research includes a laboratory study that deals with the evaluation of compressive strength for three different asphalt mixtures of hot mix asphalt (HMA).First, traditional HMA was prepared, and then, two asphalt mixtures were prepared using two different polymers, namely styrene-butadiene-styrene (SBS) using 5% SBS and reactive ethylene-butyl acrylate-glycidyl methacrylate terpolymer (Ax) using three concentrations (1% Ax, 2% Ax, and 3% Ax).Polymers are used as additives to enhance the performance of mixtures by enabling the creation of blends that resist rutting and cracking.The polymer-asphalt blends and conventional mixes were assessed by examining their Marshall stability, indirect tensile strength, and compressive strength.The results indicated that the mixtures modified with Ax exhibited enhanced mechanical properties, followed by the modified blend with 5% SBS.The modified asphalt mixtures exhibit superior performance compared with unmodified asphalt, as they possess greater Marshall stability, indirect tensile strength, and compressive strength.The relationships were derived for all three asphalt mixtures (traditional HMA and the two polymer-modified mixtures).These relations were quite strong, as indicated by the high value of R 2 .The empirical relations can be used to predict compressive strength in a mix based on stability and indirect tensile strength data without performing the compressive strength test.Moreover, the association between compressive strength and stability proves to be more robust than the correlation between compressive strength and indirect tensile strength.