Effects of Minimum Cementitious Paste Volume and Blended Aggregates on Compressive Strength and Surface Resistivity of Portland Limestone Cement Concrete

Portland limestone cement (PLC) has been used in all classes of concrete in Florida since 2017. In order to comprehensively use PLC, this study investigates the effects of cementitious paste volume (CPV), water to cementitious materials ($\mathrm{w}/\mathrm{cm}$ ) ratio on PLC concrete mixes with or without incorporation of the blended aggregate optimization (BAO) technique. The prelimary results indicated that CPV and aggregate gradation affected the workability, and $\mathrm{w}/\mathrm{cm}$ ratio mainly influenced strength in PLC concrete. Using a lower CPV can improve the electronic resistance and durability of PLC concrete. The findings of this research can help design the proper PLC concrete mix with low cost and environmental impact.