3,500 psi min. 60 lb. bag (56 bags/pallet) Holcim Concrete Mix consists of Portland Cement, fine aggregate and coarse aggregate proportioned for convenience and consistency - just add water. Holcim Concrete Mix meets the requirements of ASTM C387 for normal strength, normal weight concrete. One bag will yield approximately Vi of a cubic foot of concrete. This versatile product can be used for many applications, including: a grout mix for filling masonry cavity walls, setting posts, building walkways, topping concrete, or other similar projects requiring greater than 2” of fill.