Improving the Mechanical Properties of Red Clay Using Xanthan Gum Biopolymer

Table 3

Groups and conditions of direct shear test.

Test groups	Curing ages (days)	Vertical pressure (kPa)
		100 kPa	200 kPa	300 kPa	400 kPa
A: red clay	3	A-3-1	A-3-2	A-3-3	A-3-4
	7	A-7-1	A-7-2	A-7-3	A-7-4
	14	A-14-1	A-14-2	A-14-3	A-14-4
	28	A-28-1	A-28-2	A-28-3	A-28-4
B:	3	B-3-1	B-3-2	B-3-3	B-3-4
	7	B-7-1	B-7-2	B-7-3	B-7-4
	14	B-14-1	B-14-2	B-14-3	B-14-4
	28	B-28-1	B-28-2	B-28-3	B-28-4
C:	3	C-3-1	C-3-2	C-3-3	C-3-4
	7	C-7-1	C-7-2	C-7-3	C-7-4
	14	C-14-1	C-14-2	C-14-3	C-14-4
	28	C-28-1	C-28-2	C-28-3	C-28-4
D:	3	D-3-1	D-3-2	D-3-3	D-3-4
	7	D-7-1	C-7-2	D-7-3	D-7-4
	14	D-14-1	C-14-2	D-14-3	D-14-4
	28	D-28-1	C-28-2	D-28-3	D-28-4
E:	3	E-3-1	E-3-2	E-3-3	E-3-4
	7	E-7-1	E-7-2	E-7-3	E-7-4
	14	E-14-1	E-14-2	E-14-3	E-14-4
	28	E-28-1	E-28-2	E-28-3	E-28-4