A geotechnical description of fresh cement grout - filtration and consolidation behaviour

John McKinley, M.D. Bolton

    Research output: Contribution to journalArticlepeer-review

    19 Citations (Scopus)

    Abstract

    The removal of water from three Portland cement grouts by pressure filtration is examined, and the consolidation behaviour of the filtered material clarified. The filtration takes place by the laying down of a very stiff filter cake through the removal of excess water. The behaviour due to further loading resembles that of a re-constituted silt. For stress levels above the filtration pressure the calculated permeability values are similar to those from the filtration phase only if the data sampling rate was sufficiently rapid to discriminate the first portion of the observed primary consolidation curve. The change in void ratio for incremental loading is roughly linear with the change in the logarithm of the vertical effective stress. The characterisation of fresh cement paste using standard soil mechanics models is both appropriate and useful, at least during the first few hours after mixing.
    Original languageEnglish
    Pages (from-to)295-307
    Number of pages13
    JournalMagazine of Concrete Research
    Volume51
    Publication statusPublished - Oct 1999

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