Effect of Polymer on Shear Strength of Silty Sand - Ejge.com

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Vol. 14, Bund. A 4 Table 1: Important physicochemical properties <strong>of</strong> the as-received emulsion physicochemical properties Phase Solvability in water Density (g/cm 3 ) Viscosity PH Name <strong>of</strong> polymer poly methyl mehta acrylate (PMMA) liquid solution 1.09 330 4.8 The sand that was used was classified based on the Unified Soil Classification System (ASTM D 422- 87) as poorly graded sand (SP). The optimum moisture content for the sand was 8% by weight, as determined by the Modified Proctor Test Procedure (ASTM D 698-78), and the maximum dry density was 2.07 g/cm 3 . We performed an experimental study on the sand containing different percentages <strong>of</strong> silt and pure silt. Grain-size distribution <strong>of</strong> all soil are shown in Figure 1. Cumulative passing (%) 100 90 80 70 60 50 40 30 20 10 sand 10% silt 20% silt 25% silt 30% silt 35% silt 50% silt 70% silt silt 0 1 0.1 0.01 0.001 Size <strong>of</strong> sieve (mm) Figure 1: Particle size distribution curve 0.0001 Specimen Preparation Specimens with specified amounts <strong>of</strong> polymer and water added to the sand were prepared by mixing the polymer and water with the sand. The resulting emulsion had solid content concentrations <strong>of</strong> 0.0125%, 0.00625% and 0.00312% and added to soil with 8% (by dry weight).
Vol. 14, Bund. A 5 The soil/polymer/water mixture was processed into dough using a mechanical kneader. The uniformly mixed dough was subsequently placed into a steel mold measuring (6*6*2 cm) with density 2.07 g/ /cm 3 . Finally, the molded specimens were left to dry or cure for a period <strong>of</strong> 1 week at . Specimens containing 0.025, 0.05 and 0.1 wt. .% (by dry weight) polymer were prepared using this method. During the drying process <strong>of</strong> the specimens, the weight loss was recorded as a function <strong>of</strong> time until a steady value was reached to ensure complete removal <strong>of</strong> water. A period <strong>of</strong> 1 week was enough for all specimens to dry completely. Specimens used in this study were prepared for shear direct test in according to ASTM D 3080-90. MAX shear strenth (kpa) 350 300 250 200 150 100 50 0% polymer 100kpa 200kpa 300kpa 0 sand 10 20 25 30 35 50 70 silt silt content (%) Figure 2: <strong>Effect</strong> <strong>of</strong> silt content <strong>of</strong> shear strength for 0% polymer.
Page 1 and 2: Effect of<
Page 3: Vol. 14, Bund. A 3 However, most <s
Page 7 and 8: Vol. 14, Bund. A 7 450 400 0.1% pol
Page 9 and 10: Vol. 14, Bund. A 9 300 250 200 0.0%
Page 11: Vol. 14, Bund. A 11 REFERENCES 1. L

Effect of Polymer on Shear Strength of Silty Sand - Ejge.com

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