Abstract
A series of drained triaxial compression (TC) tests were conducted on a lightly cement-mixed gravelly soil (CMG) compacted at three different water contents (w), on a dry side, at the optimum (wopt) and at a wet side. The specimens were cured at constant water content under atmospheric pressure for periods of 7, 28 and 180 days. The TC tests performed under 20 kPa confining pressure by measuring local strains showed that the compressive strength, qmax, and the initial Young’s modulus, E0, in particular the former, became the respective maximum value when compacted at w=wopt regardless of curing period (tc). Each of the qmax and E0 value increased at a rather constant rate with respect to log (tc) even after tc= 28 days, at which the design strength is determined in the usual design practice. Such an increasing trend for CMG specimens is close enough to the conclusion drawn for cement-mixed sand specimens but differs largely from that of ordinary cement concrete, found in the existing literatures. The stress-strain behavior became more linear with tc irrespective to their molding water content.
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Lohani, T.N., Tatsuoka, F., Tateyama, M., Shibuya, S. (2007). Strengthening of Weakly-Cemented Gravelly Soil with Curing Period. In: Ling, H.I., Callisto, L., Leshchinsky, D., Koseki, J. (eds) Soil Stress-Strain Behavior: Measurement, Modeling and Analysis. Solid Mechanics and Its Applications, vol 146. Springer, Dordrecht. https://doi.org/10.1007/978-1-4020-6146-2_27
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DOI: https://doi.org/10.1007/978-1-4020-6146-2_27
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