Influence of Tire-Recycled Steel Fibers on Strength and Flexural Behavior of Reinforced Concrete

Table 7

Flexural toughness index and residual strength coefficient of steel fiber reinforced concrete.

Type	No.	Flexural toughness index				Residual strength coefficient
		I5	I10	I20	I30	R5,10	R10,20	R10,30
Industrial steel fibers	I-5	2.38	3.21	5.14	8.46	16.6	19.3	26.3
	I-10	2.81	3.99	7.55	14.77	23.6	35.6	53.9
	I-15	3.44	4.06	9.87	15.82	12.4	58.1	58.8
	I-20	4.56	6.48	10.80	19.15	38.4	43.2	63.4
	I-25	5.48	9.96	14.59	26.45	89.6	46.3	82.5
Tire-recycled steel fibers	T-12	2.55	3.57	5.33	7.16	20.4	17.6	18.0
	T-18	3.14	5.33	7.14	10.05	43.8	18.1	23.6
	T-24	3.87	6.03	9.87	14.71	43.2	38.4	43.4
	T-30	4.26	6.09	10.69	18.74	36.6	46.0	63.3
	T-36	4.75	8.57	14.88	23.75	76.4	63.1	75.9