Mechanical Properties of Scrap Tire Crumbs-Clayey Soil Mixtures Determined by Laboratory Tests

Table 4

The results of repeated direct shear tests for mixtures.

Rubber content (%)	Normal stress (kPa)	Peak strength (kPa)	Residual strength (kPa)	Shear displacement at residual strength (mm)	Moisture content increase ratio (%)
Clayey soil	100	83.5	78.5	45∼48	1.58
	200	157	135
	300	221	202
10	100	71.6	68.7	65∼70	1.15
	200	140	125
	300	215	180
20	100	88.5	63.5	83∼86	1.46
	200	137	116
	300	219	175
30	100	95.3	62.6	94∼97	1.27
	200	155	109
	300	210	170