Structural Behavior of Concrete Beams Containing Recycled Coarse Aggregates under Flexure

Table 4

Experimental values of the cracking, yield, and ultimate loads.

Beam specimen	Initial cracking		Yield state		Ultimate state		Ductility index
	Pcr (kN)	Δcr (mm)	Py (kN)	Δy (mm)	Pu (kN)	Δu (mm)
R000-S1	13.4	1.90	52.5	14.9	66.3	90.3	4.7
R000-S2	13.0	1.50	68.0	13.8	91.5	96.8	6.4
R000-S3	7.2	0.80	112.4	19.0	121.5	46.0	2.4
R030-S1	14.7	1.10	53.9	14.5	65.2	86.3	4.7
R030-S2	16.1	1.84	68.5	13.1	88.3	92.2	7.0
R030-S3	15.3	1.63	115.9	20.0	123.7	34.9	1.7
R050-S1	10.0	1.12	48.7	14.5	57.1	70.9	4.9
R050-S2	8.9	1.13	61.6	14.7	82.2	93.5	6.3
R050-S3	11.9	1.18	110.2	19.8	124.3	50.3	2.5
R100-S1	11.9	1.39	54.7	15.2	67.9	73.3	4.8
R100-S2	5.0	0.60	61.9	12.9	81.0	84.7	6.6
R100-S3	5.9	0.50	110.9	21.5	120.4	41.2	1.9