Effects of Single and Hybrid Steel Fiber Lengths and Fiber Contents on the Mechanical Properties of High-Strength Fiber-Reinforced Concrete

Table 8

Comparison of the test results and estimation from the regression analysis of the tensile strength .

Mixture	Batch	Number of specimens	Number of specimens successfully evaluated in the inverse analysis	Maximum load (kN)	Test result of the tensile strength (MPa)	Prediction of the tensile strength (MPa)
F20-S-L130	1	3	—	69.7	—	14.71
	2	4	3	60.0	12.73	12.67
	3	4	1	62.5	12.90	13.2
	4	4	3	63.3	13.10	13.36
	5	4	1	61.3	8.90	12.94
	6	4	2	72.0	15.00	15.21
	7	6	3	74.7	17.29	15.77
	8	6	4	79.7	17.15	16.83
	9	5	2	73.4	16.86	15.5
	Mean			67.2	14.92	14.18
F20-H	1	6	2	89.0	18.80	18.8
	2	3	1	70.1	14.69	14.8
	3	5	4	71.9	15.36	15.18
	4	6	2	62.6	13.38	13.21
	5	6	1	61.5	13.79	12.98
	6	6	4	62.3	13.58	13.16
	Mean			69.4	14.90	14.66