India annually produces around 200 million tons of fly ash as a waste from coal based thermal power plants and more than 1.6 billion new tires and about 1 billion used tires are produced by the transportation industries. But barely 100 million tires were processed annually by the recycling sector, and the rest are dumped into the landfills as waste materials. Hence necessitating their effective utilization to mitigate environmental challenges. Despite limited research on their combined use, this study investigates the small strain shear modulus of mixtures composed of fly ash and tire-derived materials. The focus of this study is to understand how varying ratios of these materials, alongside different relative densities (50, 70), confining pressures (50, 75, 100), amplitudes (10, 15, 20), and frequencies (7.5, 10, 12.5), affect the shear modulus and shear wave velocity. The Bender element test has been used to determine these parameters, considering a different mix denoted as FT0, FT10, FT20, and FT100, corresponding to mixing ratios of fly ash and rubber of 100:0, 90:10, 80:20, and 0:100 respectively. The results indicate a notable decrease in shear modulus and shear wave velocity with the addition of tire scraps to fly ash, shedding light on the material behavior under different conditions. This research underscores the significance of utilizing waste materials for constructive purposes, offering insights into sustainable practices in construction and civil engineering while addressing environmental concerns.