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    Volume 26, Issue 4 (December 2003)

    Mechanical Behavior of a Pulverized Fly Ash Grouted Sand

    (Received 27 March 2002; accepted 31 October 2002)

    Published Online: 2003


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    A laboratory investigation was conducted in order to develop a new grout based on pulverized fly ash. Pulverization of a selected Greek fly ash yielded a gradation with D15 = 1.3 µm, D50 = 6 µm, and D85 = 20 µm and Blaine specific surface approximately equal to 8300 cm2/g. Suspensions of this pulverized fly ash, improved with additives, have comparable properties to ordinary and microfine cement suspensions. Suspensions were injected into clean sands. Permeability, UU, and CU-PP triaxial compression tests were conducted on the grouted specimens. The coefficient of permeability of the sands is reduced by 4 to 7 orders of magnitude. Grouting increases the stiffness and reduces the deformability of the sands. The Mohr-Coulomb failure criterion represents adequately the behavior of the grouted sands, yielding cohesion values ranging from 290 to 450 kPa and angle of internal friction values up to 5° higher than those of the clean sands. The shear strength parameters vary with axial strain, attaining their final values well before failure.

    Author Information:

    Markou, IN
    Lecturer, Democritus University of Thrace, School of Engineering, Xanthi,

    Atmatzidis, DK
    Professor, University of Patras, School of Engineering, Rio (Patra),

    Stock #: GTJ11252J


    DOI: 10.1520/GTJ11252J

    Title Mechanical Behavior of a Pulverized Fly Ash Grouted Sand
    Symposium ,
    Committee D18