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

Table 1

Parameters of specimens.

Group	Number of keyways	Bonding materials	Concrete grade	Specimen
				Qty.
K0-NA-40	0	No interface agent	C40	3
K1-NA-40	1			3
K2-NA-40	2			3
K3-NA-40	3			3
K2-CP-40	2	Cement slurry	C40	3
K2-SC-40		Silica fume-modified cement slurry		3
K2-EC-40		Expansion agent-modified cement slurry		3
K2-NA-30	2	No interface agent	C30	3
K2-NA-35			C35	3
K2-NA-50			C50	3

Note. (1) Cement slurry is so prepared that the mass ratio of cement to water is 1 : 0.35, and the cement is the P II 52.5 cement. (2) Silica fume-modified cement slurry is so prepared that the mass ratio of cement to silica fume to water is 0.95 : 0.05 : 0.35, and the silica fume is the 970 silica fume. (3) Expansion agent-modified cement slurry is so prepared that the mass ratio of cement to expansion agent to water is 0.9 : 0.1 : 0.35, and the expansion agent is the CSA type expansion agent made in Japan.