Proper Grout Rheology Assures Quality Work

Traditional grouts consisted of fluid suspensions of cement and water and these continue to be sometimes used. Such mixtures are subject to sedimentation of the solids resulting in incomplete filling of the injected voids, and thus poor quality work. Grouting is now performed for an ever-expanding variety of objectives which require special grout properties varying from self-leveling fluid to stiff mortar-like low mobility. Established cement technology and material science now enable design of stable grout mixes with virtually any desired properties. The many available mix ingredients and admixtures are discussed, as is practical mix design of optimal grout for a variety of typical applications.