Mechanical properties of high-volume fly ash roller compacted concrete designed by maximum density method

► Up to 60 wt% of cement, cement or aggregate was substituted with fly ash in RCC mixtures. ► Replacing cement with fly ash increased optimum water content of the mixture. ► Thus, reduced its strength even up to 180 days. ► Replacing aggregate with fly ash increased the compactibility of the mixture. ► W/b ratios of fly ash RCC were lower but their strengths were higher than control mix.