Experimental Investigation on Shear Strength between Ultra-High-Performance Concrete and Normal Concrete Substrates

Table 7

The Interfacial bond strength, bond stiffness, and slip.

Group	Specimen No.	(MPa)	(mm)	(MPa)	(MPa/mm)		(mm)	(MPa)	(MPa/mm)		(mm)
K0-NA-40	K0-NA-40-1	0.125	0.267	2.389	8.503	0.999	—
	K0-NA-40-2	0.308	0.266	2.116	6.516	0.981	—
K1-NA-40	K1-NA-40-1	0.127	0.086	0.381	2.947	0.924	0.492	4.859	11.028	0.996	0.541
	K1-NA-40-2	0.156	0.109	0.498	3.356	0.953	0.216	5.367	45.297	0.991	0.296
	K1-NA-40-3	0.141	0.100	1.169	10.248	0.975	0.292	4.707	18.393	0.998	0.429
K2-NA-40	K2-NA-40-1	0.161	0.179	1.850	9.411	0.990	0.546	9.065	19.678	0.998	0.621
	K2-NA-40-2	0.144	0.087	1.149	11.447	0.975	0.509	10.478	22.137	0.999	0.713
	K2-NA-40-3	0.137	0.184	0.508	2.014	0.984	0.662	9.520	18.834	0.998	0.726
K3-NA-40	K3-NA-40-1	0.266	0.194	1.435	6.011	0.972	0.848	14.184	19.516	0.999	0.868
	K3-NA-40-2	0.156	0.266	0.855	2.632	0.976	0.903	13.391	19.641	0.998	1.198
	K3-NA-40-3	0.151	0.222	0.920	3.461	0.972	0.873	14.115	20.274	0.998	1.199