These mixes can be the most cement rich and most fluid of all the many concrete varieties. Masonry Block fill has the lowest strength, usually in the 2000 psi range and at the upper end are the Auger Cast grouts, which have cement content up to 10sx per cubic yard. Strength is critical in auger cast placements, since ultimately the finished product becomes a subterranean column supporting an above ground structure. All these mixes are pumpable and are generally exclusively sand mixes. The delivered Slump is a very high 6” to 10” so that the mix will flow; in the case of masonry fill, or is very fluid; in the case of auger cast piles to allow for the insertion of intricate rebar cages

Salmon Bay Sand and Gravel Co.