Erosion Rate of Compacted NA‐Montmorillonite Soils
Publication: Journal of Geotechnical Engineering
Volume 114, Issue 3
Abstract
Erosion rates of unsaturated compacted Na‐montmorillonite clays are measured under a range of tractive stresses from surface flows in a rectangular flume. The degree of saturation of compacted samples ranges from 0.52–0.97. The Na‐montmorillonite (Volclay bentonite) is mixed with ground silica to obtain samples with various percentages of clay. Samples of 100, 70, 40, and 10% clay content by dry weight are tested. Samples are compacted under 700 Pa into sample containers with surface area and are subjected to flowing water in the flume. The results of the study show that the erosion rate of Na‐montmorillonite soil samples increases when clay content decreases and is independent of compaction water content. The relationship between erosion rate and tractive stress is linear for all Na‐montmorillonite samples. For the range of water content tested, an empirical relationship is developed to estimate the erosion rate of compacted Na‐montmorillonite clays as a function of percent clay content and tractive stress.
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References
1.
Alizadeh, A. (1974). “Amount and type of clay and pore fluid influence on the critical shear stress and swelling of cohesive soils.” Thesis presented to the University of California, at Davis, Calif., in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
2.
Chow, V. T. (1959). Open‐channel hydraulics. McGraw‐Hill, New York, N.Y., 168 and 200.
3.
Grissinger, E. H. (1966). “Resistance of selected clay systems to erosion by water.” Water Resourc. Res., 2(1), 131–138.
4.
Kandiah, A. (1974). “Fundamental aspects of surface erosion of cohesive soils.” Thesis presented to the University of California, at Davis, Calif., in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
5.
Lambe, T. W. (1958). “The structure of compacted clays.” J. Soil Mech. Found. Engrg. Div., ASCE, 84(2), 682–706.
6.
Liou, Y. D. (1970). “Hydraulic erodibility of two pure clay systems.” Thesis presented to Colorado State Univ., at Fort Collins, Colo., in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
7.
Seed, H. B., and Chan, C. K. (1961). “Compacted clays: structure and strength characteristics.” Trans., ASCE, 126(1), 1343–1425.
8.
Shaikh, A. (1986). “Surface erosion of compacted clays.” Thesis presented to Colorado State Univ., at Fort Collins, Colo., in partial fulfillment of the requirements for the degree of Doctor of Philosophy.
Information & Authors
Information
Published In
Journal of Geotechnical Engineering
Volume 114 • Issue 3 • March 1988
Pages: 296 - 305
Copyright
Copyright © 1988 ASCE.
History
Published online: Mar 1, 1988
Published in print: Mar 1988
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