Bond Behavior between Steel Rebar and RCA Concrete after Exposure to Elevated Temperatures

Table 4

Tested and predicted bond strength.

No.	T (°C)	t (h)	fc (MPa)	s0 (mm)	τ0exp (MPa)	τ0cal (MPa)	Error (%)
NC	20	1	37.92	0.37	14.71	15.39	4.62
	200	1	35.34	0.88	12.32	12.83	4.14
	400	1	32.12	1.44	9.81	9.87	0.61
	600	1	25.21	1.98	5.85	5.99	2.39
	600	0.5	27.80	2.24	8.53	8.55	0.23
	600	2	21.21	1.79	1.99	2.24	12.56
RAC50	20	1	30.53	0.43	13.11	13.81	5.34
	200	1	27.62	0.92	11.12	11.10	0.18
	400	1	24.15	1.51	7.93	7.99	0.76
	600	1	20.26	2.05	4.56	4.69	2.85
	600	0.5	22.41	2.32	6.89	7.20	4.49
	600	2	19.82	1.86	1.85	1.86	0.54
RAC100	20	1	28.73	0.54	12.54	13.40	6.86
	200	1	25.72	0.97	10.52	10.64	1.14
	400	1	23.11	1.64	7.72	7.72	0.00
	600	1	19.16	2.13	4.26	4.39	3.05
	600	0.5	18.22	2.48	5.94	6.04	1.68
	600	2	17.61	1.91	1.27	1.22	3.94