Permeability Characteristics of Superfine Cement-Grouted Sand

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Title: Permeability Characteristics of Superfine Cement-Grouted Sand

Author(s): Eyubhan Avci and Murat Mollamahmutoglu

Publication: Materials Journal

Volume: 114

Issue: 01

Appears on pages(s): 21-28

Keywords: grout properties; groutability; permeability; superfine slag-based cement

Date: 1/1/2017

Abstract:
The aim of this research was to investigate the permeability of superfine cement-grouted sand. Initially, rheology of superfine cement suspensions was studied. The sedimentation and the setting time increased but the viscosity decreased as the water-cement ratio (w/c) increased. In addition, the penetrability of superfine cement suspensions with different w/c into various graded sand specimens prepared at different relative densities was tested. The penetrability of suspensions into the sand specimens was successful and increased as the w/c increased, but decreased as the relative density increased. Grouted sand samples were kept in a humidity room at a temperature of 20°C (68°F) until testing time and subjected to permeability tests at different time intervals. The coefficient of permeability increased as the w/c increased, but decreased as the relative density and the percentage of fines increased. Additionally, the coefficient of permeability of grouted samples decreased slightly with time.