Investigation of the Penetrability of CEM II/B-M Based Microfine Cement Grouts in Composite Sands with Different Gradation_Crimson Publishers
Investigation of the Penetrability of CEM II/B-M Based Microfine Cement Grouts in Composite Sands with Different Gradation by Christodoulou Dimitrios* in Crimson Publishers: Peer Reviewed Material Science Journals
Grouting is a common technical method with many applications, e.g. it is used for soil stabilization and strengthening, for reduction for water ingress to underground facilities or of the water loss through a dam foundation, etc. Grouts comprise several constituents, which are combined in many ways depending on the in-situ conditions and the outcome desired. The use of very fine cement grouts for injections into fine-to-medium sands has been proposed to circumvent problems associated with the permanence and toxicity of chemical grouts and the inability of ordinary cement grouts to permeate soil formations finer than coarse sand. A laboratory investigation was conducted in order to evaluate the penetrability of cement suspensions. Two gradations from CEM II/B-M (according to EN 197-1) type of cement were used having nominal maximum grain sizes of 100μm and 10μm. Suspension properties with water-to-cement (W/C) ratio of 2:1 by weight, were determined in terms of apparent viscosity. The experimental results reported in the present paper suggest some trend in the effect of gradation on grout penetrability, however, rather the regulatory factor is the increase in the percentage of fine components in the final composition of the mixture.
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