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

Table 4

Pull-off test results.

Average compressive strength of SCC topping (MPa)	Tensile bond strength of as-placed substrate surface (MPa)	Failure location	Tensile bond strength of grooved substrate surface (MPa)	Failure location
31.30	1.05	Interface	1.20	Interface
	0.96	Interface	1.18	Interface
	0.97	Interface	1.27	Interface
34.51	1.26	Interface	1.46	Interface
	1.21	Interface	1.50	Interface
	1.18	Interface	1.41	Interface
42.99	1.39	Interface	1.68	Interface
	1.37	Interface	1.63	Interface
	1.40	Interface	1.78	Interface
51.66	1.69	Interface	1.89	Interface
	1.56	Interface	1.95	Interface
	1.59	Interface	2.05	Interface
61.85	1.89	Interface	2.13	Substrate
	1.91	Interface	2.17	Substrate
	1.83	Interface	2.08	Substrate