Use of Silica Fume, Bentonite, and Waste Tire Rubber as Impermeable Layer Construction Materials

Table 2

Experimental test program.

Test performed	Method	Number of specimen	Dimensions of samples
Specific gravity	ASTM D-854	4 times	—
Consistency limits	ASTM D 4318-84	4 times	—
Hydraulic conductivity	ASTM D5084	2 samples for each mixture	H = 116 mm, D = 101.70 mm
Compaction characteristics	ASTM D 698	4 samples for each mixture	H = 105 mm, D = 115 mm
Free swelling tests	ASTM D-4546	4 samples for each mixture	H = 20 mm, D = 50 mm
Unconfined compressive strength	ASTM D 2166	15 samples for each mixture	H = 72 mm, D = 36 mm
Split tensile strength	ASTM C-496	15 samples for each mixture	H = 76 mm, D = 38 mm
Ultrasonic pulse velocity	ASTM C 597	5 samples for each mixture	H = 72 mm, D = 36 mm
California bearing ratio (CBR) test	ASTM D1883-05	4 samples for each mixture	H = 177.8 mm, D = 152.5 mm

All the specimens have been prepared according to compaction characteristics.