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

Table 4

Physical characteristics of the mixtures.

Sample ID	Specific gravity	Maximum dry density (γdry, Mg/m^3)	Optimum water content (, %)
90S10B	2.39	1,329	31
90S9B1WRT	2.27	1,311	31.2
90S7B3WRT	2.08	1,303	31.4
90S5B5WRT	1.72	1.29	31.6
90S3B7WRT	1.97	1,289	31.2
90S1B9WRT	2.02	1,286	30.6
90S10WRT	2.31	1,284	29.5