Mechanical Behavior of Cemented Sand Reinforced with Different Polymer Fibers

Table 3

Brittleness indexes of fiber-reinforced cemented sand specimens.

Fiber type	Brittleness index (IB)
	Fiber length = 6 mm			Fiber length = 9 mm			Fiber length = 12 mm
	100 kPa	300 kPa	500 kPa	100 kPa	300 kPa	500 kPa	100 kPa	300 kPa	500 kPa
Polyamide	1.0496	0.4268	0.3136	0.5441	0.2564	0.2564	0.8683	0.5873	0.2816
	1.1450	0.3631	0.2558	0.7383	0.1589	0.1589	1.1450	0.4653	0.1655
	0.7677	0.2244	0.2243	0.7195	0.1086	0.1086	0.6387	0.6712	0.1621
	0.7132	0.23.1	0.2461	0.6814	0.1927	0.2874	0.6211	0.8357	0.2031
Polyester	0.5911	0.3114	0.1278	0.9532	0.4786	0.2322	0.8123	0.5739	0.3267
	0.8567	0.3392	0.1773	0.8912	0.3630	0.2127	0.7367	0.6783	0.2369
	0.7360	0.5415	0.2663	0.7616	0.4441	0.1885	0.7210	0.8764	0.2646
	1.2360	0.8433	0.3114	0.9214	0.5791	0.2613	0.7163	1.0238	0.3816
Polypropylene	0.5406	0.3242	0.1470	0.6914	0.2255	0.5180	0.7236	0.5262	0.2470
	0.3337	0.137	0.1198	0.3655	0.1604	0.2255	0.8346	0.6791	0.1521
	0.4058	0.1918	0.1012	0.2332	0.0578	0.1604	0.8896	0.8459	0.2134
	0.6771	0.3.58	0.2131	0.5546	0.2174	0.0078	1.2486	0.7143	0.3129