[Mojoe]

Portland cement (white or gray) and masonry cement are different with the exception of they both get hard when water is added. Masonry cement uses the same clinker (small balls resulting from cooking raw materials in a 2700 F rotary kiln) as Portland cement but it is ground finer and has hydrated lime added during the milling process. The finer grind and lime addition makes the product weaker more pliable than Portland cement.

There is also a product known as PCL, portland cement and lime, which is typically used for at or below grade applications or when high strength is needed. Many government jobs spec this material when constructing schools, jails, etc when laying the cmu's. We produce this product either in the mill or we blend the portland with the hydrated lime in our mixer.