Experimental Study on Bond Behavior between Plain Reinforcing Bars and Concrete

Table 3

Main test results.

Number	Concrete strength/MPa	Diameters/mm	Length of embedment/mm	Maximum load; /kN	Bond strength /MPa	Average value /MPa
PS14-1a				21.05	4.79
PS14-1b	48.5	14	100	24.27	5.52	5.10
PS14-1c				22.00	5.00
PS14-2a				34.88	5.66
PS14-2b	48.5	14	140	32.68	5.31	5.51
PS14-2c				34.14	5.54
AA14-1a				1.03	0.23
AA14-1b	40.8		100	0.98	0.22	0.26
AA14-1c				1.46	0.33
AA14-2a				2.06	0.33
AA14-2b	40.8	14	140	5.84	0.95	0.31
AA14-2c				1.76	0.29
S14-1a				91.69	20.85
S14-1b	48.5	14	100	79.64	18.11	19.80
S14-1c				89.90	20.44
PS16-1a				11.05	1.91
PS16-1b	40.8	16	115	14.97	2.59	2.22
PS16-1c				12.42	2.15
PS16-2a				30.13	3.75
PS16-2b	48.5	16	160	19.25	2.39	3.22
PS16-2c				28.32	3.52
AA16-1a				1.40	0.24
AA16-1b	40.8	16	115	1.46	0.25	0.23
AA16-1c				1.14	0.20
AA16-2a				5.38	0.67
AA16-2b	40.8	16	160	4.29	0.53	0.54
AA16-2c				3.31	0.41
S16-1a				111.02	19.21
S16-1b	48.5	16	115	120.78	20.89	20.33
S16-1c				120.70	20.88
PS8-1a				0.60	0.30
PS8-1b	40.8	8	80	0.56	0.28	0.25
PS8-1c				0.35	0.17
PS8-2a				4.44	1.47
PS8-2b	40.8	8	120	7.31	2.42	2.27
PS8-2c				8.76	2.90
AA8-1a				—	—
AA8-1b	40.8	8	80	0.37	0.18	0.21
AA8-1c				0.46	0.23
AA8-2a				0.42	0.14
AA8-2b	40.8	8	120	0.57	0.19	0.18
AA8-2c				0.64	0.21

Note: in the above table, the data of AA8-1a was not got for reason of operation; and data of AA14-2b is anomalous and was wiped off then.