Description Properly graded sand and gravel blended with portland cement for use as in general concrete applications. Use for: sidewalks, driveways, setting posts, footings, floors and curbs. Reaches 4000 psi in 28 days.Features:Designed for pouring concrete 2-in thick or more and building or repairing anything out of concreteIdeal for sidewalks, curbs, steps, ramps, walkways and patiosExceeds the compressive strength requirements of ASTM C387Pre-blended for ease of use