Effect of Short Duration of Load increment on the Compressibility of Soils

    Volume 17, Issue 4 (December 1994)

    ISSN: 0149-6115

    CODEN: GTJOAD

    Page Count: 9


    Sridharan, A
    Professor, senior scientific office, and research scholar, Indian Institute of Science, Bangalore,

    Sivapullaiah, PV
    Professor, senior scientific office, and research scholar, Indian Institute of Science, Bangalore,

    Stalin, VK
    Professor, senior scientific office, and research scholar, Indian Institute of Science, Bangalore,

    Abstract

    This study concerns the effect of duration of load increment (up to 24 h) on the consolidation properties of expansive black cotton soil (liquid limit = 81%) and nonexpansive kaolinite (liquid limit = 49%). It indicates that the amount and rate of compression are not noticeably affected by the duration of loading for a standard sample of 25 mm in height and 76.2 mm in diameter with double drainage. Hence, the compression index and coefficient of consolidation can be obtained with reasonable accuracy even if the duration of each load increment is as short as 4 h.

    The secondary compression coefficient (Cαε) for kaolinite can be obtained for any pressure range with 1/2 h of loading, which, however, requires 4 h for black cotton soil. This is because primary consolidation is completed early in the case of kaolinite. The paper proves that the conventional consolidation test can be carried out with much shorter duration of loading (less than 4 h) than the standard specification of 24 h or more even for remolded fine-grained soils.


    Paper ID: GTJ10309J

    DOI: 10.1520/GTJ10309J

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    Author
    Title Effect of Short Duration of Load increment on the Compressibility of Soils
    Symposium , 0000-00-00
    Committee D18