Effects of Clay and Moisture Content on Direct Shear Tests for Clay-Sand Mixtures

Table 2

Chemical composition of Al-Qatif clay.

K^+ (%)	K2O (%)	Al (%)	Al2O3 (%)	Si (%)	SiO2 (%)	Ca^2+ (%)	CaO (%)
1.8	2.2	3.3	6.3	8.1	17.3	0.7	0.9

After Dafalla et al. [4].