ISSN: 0149-6115
Page Count: 5

T Chart to Evaluate Consolidation Test Results

Tewatia, SK
Assistant research officer and director,Central Soil and Materials Research Station, Olof Palme Marg,

Venkatachalam, K
Assistant research officer and director,Central Soil and Materials Research Station, Olof Palme Marg,

Sridharan, A
Professor of Civil Engineering,Indian Institute of Science,

Abstract

Using Terzaghi's degree of consolidation, U, and the time factor, T, relationship, if M^U1 and M^U2 (M^U1 ≠ M^U2) are slopes of the U−√T curve at any two time factors T^U1 and T^U2, then it can be shown that a unique relationship exists between T^U2/T^U1, M^U1/M^U2, and T^U1 (or T^U2), and knowing any two of these, the third can be uniquely determined. A chart, called the T chart, has been plotted using these three variables for quickly determining T and U at any experimental time, t, to determine the coefficient of consolidation, c^v, corrected zero settlement, δ⁰, and ultimate primary settlement, δ¹⁰⁰. The chart can be used even in those cases where settlement and time, at the instant of load increment, are not known.

Keywords:
coefficients, clays, consolidation, laboratory test, slope, rate of settlement

Paper ID: GTJ10900J
DOI: 10.1520/GTJ10900J
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