Experimental Investigation of Microfine Cement Suspensions Injectability in Sandy Soils

ABSTRACT

A laboratory investigation was conducted in order to evaluate the properties and the groutability of microfine cements. Four gradations from CEM II/B-M type of cement were used having nominal maximum grain sizes of 100 μm, 40 μm, 20 μm and 10 μm. The properties of suspensions, with water to cement ratios of 1:1, 2:1 and 3:1 by weight, were determined in terms of viscosity, bleeding, setting times and unconfined compression strength. Injectability was evaluated by conducting one-dimensional injections into five different, clean sands using two specially constructed devices. Groutability of cement suspensions increases with increasing cement fineness and water to cement ratio. Microfine cement suspensions with water to cement ratios of 2:1 and 3:1 can penetrate into medium-to-fine sands. Groutability predictions by conventional criteria are not always confirmed by laboratory injections.

KEYWORDS

Permeation grouting, cement suspensions, sands, laboratory investigation, groutability ratios

Cite this paper

Dimitrios Christodoulou, Ioannis Markou, Alexandros Droudakis. (2021) Experimental Investigation of Microfine Cement Suspensions Injectability in Sandy Soils. International Journal of Environmental Science, 6, 445-456