Effect of Chromium Ion on the Strength Characteristics and Damage Law of Red Clay

Table 2

Triaxial test plan.

Heavy metal ion	Concentration	Confining pressure (kPa)	Dry density (g/cm^3)
Cr^3+	0%	100, 200, 300, 400	1.35, 1.40, 1.45
	0.01%	100, 200, 300, 400	1.35, 1.40, 1.45
	0.05%	100, 200, 300, 400	1.35, 1.40, 1.45
	0.1%	100, 200, 300, 400	1.35, 1.40, 1.45