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Chemical analysis of tested materials [3]_
Composition (%) | Chlef sand | Chlef silt |
---|---|---|
Fire loss | 14.34 | 10.85 |
Total Silica (SiO2) | 55.89 | 48.95 |
Alumina (Al2O3) | 5.58 | 34.08 |
Oxide of iron (Fe2O3) | 7.58 | 1.43 |
Oxide of titane (TiO2) | 0.00 | 0.00 |
Lime (CaO) | 15.42 | 0.20 |
Magnesia (MgO). | 0.00 | 0.42 |
Potash (K2O) | Traces | 2.26 |
Oxide of sodium (Na2O) | Traces | 0.06 |
Sulfates SO4 | 0.28 | 0.00 |
Chlorides CL-Solubles in water | 0.14 | 0.00 |
Carbonates CaCO3 | 24.60 | 0.00 |
Insolubles | 0.53 | 0.00 |
Organic materials | 0.00 | 0.00 |
Coefficients A, B and R2 for equation (3) (RD = 80%)_
sn (kPa) | Preparation method | A | B | R2 |
---|---|---|---|---|
100 | Air pluviation (AP) | −0.351 | 93.826 | 0.97 |
200 | −1.325 | 213.47 | 0.98 | |
400 | −2.366 | 377.46 | 0.99 | |
100 | Moist tamping (MT) | −0.106 | 74.932 | 0.88 |
200 | −0.214 | 160.2 | 0.98 | |
400 | −0.860 | 304.74 | 0.91 |
Coefficients A, B and R2 for equation (2)_
sn (kPa) | RD (%) | A | B | R2 |
---|---|---|---|---|
100 | 65 | −5.221 | 88.869 | 0.94 |
200 | −12.52 | 183.33 | 0.90 | |
400 | −20.73 | 345.97 | 0.89 | |
100 | 80 | −6.83 | 94.153 | 0.98 |
200 | −15.94 | 203.42 | 0.87 | |
400 | −25.48 | 370.26 | 0.90 |
Cohesion and friction angle for test result_
Material | w (%) | RD (%) | c (kPa) | j (°) |
---|---|---|---|---|
Clean sand | 0 | 65 | 0 | 41.67 |
85 | 0 | 44.13 | ||
1 | 65 | 0 | 38.66 | |
80 | 0 | 39.69 | ||
2 | 65 | 0 | 36.50 | |
80 | 0 | 38.31 | ||
3 | 65 | 0 | 36.13 | |
80 | 0 | 37.23 |
Cohesion and friction angle for tests result_
Material | Fc (%) | RD (%) | c (kPa) | j (°) |
---|---|---|---|---|
Clean sand | 0 | 65 | 0 | 41.67 |
85 | 0 | 44.13 | ||
10 | 65 | 9.13 | 39.01 | |
80 | 15.33 | 40.36 | ||
Sand-silt mixtures | 20 | 65 | 11.20 | 37.23 |
80 | 15.88 | 38.66 | ||
30 | 65 | 13.54 | 35.37 | |
80 | 17.17 | 35.75 | ||
40 | 65 | 15.09 | 33.82 | |
80 | 18.86 | 34.05 |
Index properties of sand-silt mixtures_
Materials | Fc (%) | Gs | D10 (mm) | D50 (mm) | Cu | Cc | emin | emax |
---|---|---|---|---|---|---|---|---|
Clean sand | 0 | 2.650 | 0.17 | 0.41 | 2.82 | 1.10 | 0.623 | 0.848 |
10 | 2.653 | 0.08 | 0.38 | 5.28 | 1.70 | 0.487 | 0.811 | |
Sand-silt mixtures | 20 | 2.656 | 0.04 | 0.33 | 9.80 | 1.92 | 0.455 | 0.776 |
30 | 2.659 | 0.03 | 0.32 | 13.31 | 0.84 | 0.421 | 0.749 | |
40 | 2.662 | 0.02 | 0.25 | 15.17 | 0.01 | 0.489 | 0.803 | |
Chlef silt | 100 | 2.667 | - | 0.03 | - | - | 0.593 | 0.783 |
Coefficients A, B and R2 for equation (3) (RD = 65%)_
sn (kPa) | Preparation method | A | B | R2 |
---|---|---|---|---|
100 | Air pluviation (AP) | −0.274 | 88.4 | 0.93 |
200 | −0.875 | 188.68 | 0.99 | |
400 | −1.823 | 350.92 | 0.99 | |
100 | Moist tamping (MT) | −0.179 | 73.794 | 0.92 |
200 | −0.400 | 151.71 | 0.90 | |
400 | −1.024 | 292.67 | 0.99 |