RHEOLOGY OF LATEX-MODIFIED GROUTS

The rheology of grouts containing latex was investigated. The two late x additives used were carboxylated styrene-butadiene and acrylic. The influences of superplasticizer, fly ash, and blast furnace slag on the rheology of latex-modified grouts were addressed. Shear stress-shear rate curves were determined for a variety of mix proportions. The time -dependent behaviour of selected grouts was also studied. It was deter mined that the yield stress and apparent viscosity are influenced by l atex content and that the grouts are shear thinning at low water/cemen t ratios. Latex imparts stability and thixotropy in grouts. Partial re placement of cement with either fly ash or slag diminishes the effect of latex on theology. (C) 1997 Elsevier Science Ltd.