An Improved Prediction Method of Soil-Water Characteristic Curve by Geometrical Derivation and Empirical Equation

Table 4

Specific ratio of kaolin and sand in different types of soil.

Type	Specific gravity of soil solids	Dry density	Ingredients
			Sand (%)	Silt (%)	Clay (%)
Sand sample	2.63	1.65	77	15	8
Silt sample	2.66	1.30	40	50	10
Clay sample	2.69	1.20	23	20	57