Evaluation of actual and estimated hydraulic conductivity of sands with different gradation and shape

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Table 2 Some physical characteristics of the CSS samples

Gradation (mm)	d₁₀ (mm)	d₂₀ (mm)	d₃₀ (mm)	d₅₀ (mm)	d₆₀ (mm)	c_u	c_c	n	e_max	e_min	e_test	d (g/cm³)	I₀ (mm)	k (cm/s)
4.75–2	2.20	2.40	2.60	3.10	3.30	1.50	0.93	0.51	1.12	0.83	1.02	1.32	2.00	2.45
2–1.18	1.25	1.30	1.38	1.63	1.70	1.35	0.89	0.50	1.08	0.82	0.99	1.34	1.18	0.47
1.18–0.6	0.64	0.69	0.74	0.84	0.90	1.41	0.93	0.49	1.04	0.80	0.96	1.36	0.60	0.19
0.6–0.425	0.43	0.45	0.47	0.50	0.51	1.19	1.00	0.48	0.88	0.75	0.83	0.45	0.43	0.11
0.425–0.3	0.32	0.33	0.34	0.35	0.37	1.16	0.98	0.45	1.08	0.80	0.98	1.34	0.30	0.07
4.75–0.075	0.33	0.44	0.59	1.00	1.45	4.39	0.73	0.48	1.02	0.69	0.91	1.40	0.25	0.05
2–0.075	0.24	0.36	0.46	0.69	0.87	3.63	1.01	0.48	1.03	0.69	0.91	1.40	0.19	0.03
1.18–0.075	0.17	0.31	0.38	0.50	0.59	3.47	1.44	0.46	0.97	0.64	0.86	1.43	0.14	0.03
0.6–0.075	0.13	0.20	0.31	0.39	0.43	3.27	1.74	0.44	0.91	0.56	0.79	1.49	0.09	0.02
0.425–0.075	0.11	0.16	0.22	0.32	0.34	3.09	1.29	0.43	0.86	0.52	0.74	1.53	0.08	0.02
0.3–0.075	0.09	0.10	0.12	0.16	0.18	2.07	0.92	0.40	0.78	0.47	0.67	1.59	0.08	0.01
4.75–0.6	1.00	1.33	1.60	2.20	2.60	2.60	0.98	0.46	0.97	0.66	0.86	1.44	0.82	0.29
2–0.6	0.69	0.79	0.90	1.18	1.33	1.93	0.88	0.44	0.91	0.60	0.80	1.48	0.60	0.22
4.75–0.425	0.70	1.10	1.40	2.00	2.30	3.28	1.22	0.41	0.78	0.57	0.71	1.56	0.55	0.19
2–0.425	0.49	0.58	0.68	0.99	1.18	2.41	0.80	0.47	0.99	0.70	0.89	1.41	0.41	0.09
1.18–0.425	0.46	0.51	0.58	0.70	0.79	1.71	0.93	0.42	0.80	0.57	0.71	1.55	0.43	0.09