The objective of this course is to introduce and explain by case studies a new document, “211.7R-15: Guide to Proportioning Concrete Mixes with Ground Limestone and Mineral Fillers”. This main objective is to propose that a blended portland limestone cement (PLC) with supplementary cementitious material (SCM) cement blend can provide an effective synergy to produce a comparable concrete to a portland cement. This course will provide studies that show different ways that PLC and SCM concretes can attain adequate compressive strength and durability to be used in many concrete applications.