Bond Strength between Hybrid Fiber-Reinforced Lightweight Aggregate Concrete Substrate and Self-Compacting Concrete as Topping Layer

Table 5

Test results on interfacial cohesion with different substrate surface condition.

Average compressive strength of SCC topping (MPa)	Substrate surface condition
	As-placed		Longitudinally grooved		Transversally grooved
	Shear force (kN)	Interfacial shear strength (MPa)	Shear force (kN)	Interfacial shear strength (MPa)	Shear force (kN)	Interfacial shear strength (MPa)
31.300	95.40	2.39	118.20	2.96	122.90	3.07
	92.20	2.31	121.10	3.03	126.40	3.16
	91.90	2.30	122.60	3.07	125.10	3.13
34.505	98.70	2.47	123.80	3.10	126.80	3.17
	96.10	2.40	127.60	3.19	132.20	3.31
	96.80	2.42	124.30	3.11	130.70	3.27
42.990	101.70	2.54	125.20	3.13	133.60	3.34
	104.20	2.61	130.40	3.26	137.10	3.43
	103.90	2.60	128.30	3.21	135.40	3.39
51.663	110.70	2.77	137.60	3.44	142.20	3.56
	105.20	2.63	132.10	3.30	138.50	3.46
	104.90	2.62	131.80	3.30	136.90	3.42
61.845	114.80	2.87	135.40	3.39	140.80	3.52
	112.10	2.80	140.20	3.51	146.30	3.66
	109.60	2.74	137.30	3.43	144.20	3.61