Behavior of Low Grade Steel Fiber Reinforced Concrete Made with Fresh and Recycled Brick Aggregates

Table 5

Mechanical properties of concrete.

Mix	Compressive test			Indirect tensile test			Modulus of elasticity			Compressive test (NDT)
	(MPa)			(MPa)			(GPa)			(MPa)
	7 days	14 days	28 days	7 days	14 days	28 days	7 days	14 days	28 days	7 days	14 days	28 days
Plain Concrete
B SF 0%	13.93	17.57	24.01	1.61	2.16	2.67	12.03	13.34	17.93	10.53	12.1	12.2
RB SF 0%	12.15	15.35	20.75	1.26	1.94	2.44	13.89	15.17	14.14	9.1	10.5	11.6
Steel fiber (SF) reinforced concrete
B SF 0.5%	16.66	19.77	25.28	2.08	2.46	2.81	13.67	13.67	15.53	11.5	13.2	14.8
B SF 1%	17.21	21.09	26	2.31	2.75	2.92	14.76	17.38	17.79	12.7	13.7	15.8
RB SF 0.5%	14.64	18.25	23.10	1.72	2.26	2.61	11.60	15.24	17.82	9.5	12.2	13.2
RB SF 1%	15.24	19.23	23.58	2.06	2.41	2.66	15.85	16.94	19.67	10.9	12.2	13.7