Abstract
The influence of mineralogical composition of soil on the consolidation coefficient value
Highlights
The consolidation process is a combination of two phenomena: the permeability, which controls the rate at which the water is expelled out of the soil and the rate of settlement at any time, and the compressibility, which controls the evolution of excess pore pressures and the duration of the consolidation
The influence of consolidation pressure on the consolidation coefficient presented in this paper shows that when the consolidation process is controlled by mechanical factors, as in soils with predominant kaolinite content (K100B0 and K95B05), the consolidation coefficient increases with the consolidation pressure
For soils with a higher montmorillonite content (K90B10 and K85B15), where physicochemical factors affect the consolidation, the consolidation coefficient decreases with increasing consolidation pressure
Summary
The consolidation process is a combination of two phenomena: the permeability, which controls the rate at which the water is expelled out of the soil and the rate of settlement at any time, and the compressibility, which controls the evolution of excess pore pressures and the duration of the consolidation. Soil consolidation coefficient is not constant but varies with consolidation pressure, which is confirmed by few data available in the literature (Leonards & Ramiah, 1959; Samarasinghe, Huang & Drenevich, 1982; Nagase, Kusakabe & Sing-Fang Wong, 1984; Sridharan, Sivapulliah & Stalin, 1994). Since importance of this issue was marginalised in the past and not much research was done, the Authors hope to draw more attention to the subject by means of this article
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