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Title: | Small strain stiffness of unsaturated sands containing a polyacrylamide solution | Authors: | Jung, J Ku, T Ahn, J |
Keywords: | Acoustic wave velocity Polyacrylates Sand Shear strength Shear waves Soil conservation Soil pollution Stiffness Strain measurement Supersaturation Velocity Wave propagation Degree of saturations Erosion resistance Shear wave velocity Small-strain stiffness Soil remediation Unsaturated condition Unsaturated sand Water retention curve Shear flow |
Issue Date: | 2017 | Publisher: | MDPI AG | Citation: | Jung, J, Ku, T, Ahn, J (2017). Small strain stiffness of unsaturated sands containing a polyacrylamide solution. Materials 10 (4) : 401. ScholarBank@NUS Repository. https://doi.org/10.3390/ma10040401 | Rights: | Attribution 4.0 International | Abstract: | Sand improvements using organic agents have shown promising results. Polyacrylamide is one possible organic agent, which has been shown to influence the shear strength, stiffness, soil remediation, and erosion resistance of geomaterials. In this study, we explored the shear wave velocity (S-wave) and water retention curves of unsaturated sands containing polyacrylamide solutions. The shear wave velocity was measured during the water retention curve measurement tests according to the variation of the degree of saturation. The experimental setup was verified through comparison of the measured water retention curves with the published data. The results show that (1) the S-wave velocity of saturated sands increases with polyacrylamide concentration; (2) as the degree of saturation decreases, the S-wave velocity increases; (3) near the residual water (or polyacrylamide solution) saturation, the S-wave velocity increases dramatically; (4) as the degree of saturation decreases, the S-wave velocity at unsaturated conditions increases with any given water (or polyacrylamide solution) saturation, like the water retention curves; (5) the S-wave velocity increases with the increase in capillary pressure; and (6) the predicted S-wave velocity at a given degree of saturation is slightly overestimated, and the modification of the equation is required. © 2017 by the authors. | Source Title: | Materials | URI: | https://scholarbank.nus.edu.sg/handle/10635/179721 | ISSN: | 1996-1944 | DOI: | 10.3390/ma10040401 | Rights: | Attribution 4.0 International |
Appears in Collections: | Elements Staff Publications |
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