Critical State of Sand Matrix Soils

Table 2

Critical state parameters of some soil types [20].

Soil Indexes	LL	PL	𝜆	Γ	𝑁	𝑀	𝜙^′	𝜅/𝜆
Fine-grained clay soils
London clay	75	30	0.16	2.45	2.68	0.89	23°	0.39
Kaolin clay	65	15	0.19	3.14	3.26	1.00	25°	0.26
Glacial till	35	17	0.09	1.81	1.98	1.18	29°	0.16
Coarse-grained soils
River sand			0.16	2.99	3.17	1.28	32°	0.09
Decomposed granite			0.09	2.04	2.17	1.59	39°	0.06
Carbonate sand			0.34	4.35	4.80	1.65	40°	0.01