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

Table 6

Test results on interfacial shear bond strength with different substrate surface condition and various normal force which is acting perpendicularly to the interface area.

As-placed		Longitudinally grooved		Transversally grooved		Remarks
Stress (MPa)		Stress (MPa)		Stress (MPa)
Normal	Shear	Normal	Shear	Normal	Shear
0.00	2.58	0.00	3.39	0.00	3.57	—
0.00	2.71	0.00	3.44	0.00	3.73	—
0.00	2.86	0.00	3.38	0.00	3.59	—
0.66	3.17	0.62	3.50	0.67	3.89	Compression
0.74	2.97	0.52	3.68	0.72	3.96	Compression
0.70	3.12	0.50	3.85	0.51	3.98	Compression
1.02	3.36	1.19	3.84	0.99	4.38	Compression
1.06	3.21	0.99	3.82	1.12	4.74	Compression
1.05	3.20	1.13	4.20	1.17	4.66	Compression
1.68	3.50	1.47	5.12	1.73	4.99	Compression
1.64	3.44	1.63	4.81	1.51	5.23	Compression
1.49	3.50	1.65	5.45	1.42	5.12	Compression
2.02	4.20	2.15	5.72	2.07	6.40	Compression
2.03	4.52	2.15	5.56	2.20	6.10	Compression
2.15	4.52	2.13	5.52	2.13	7.25	Compression
0.14	2.11	0.19	2.72	0.14	2.87	Tension
0.18	1.94	0.16	2.44	0.12	2.90	Tension
0.20	1.69	0.20	2.26	0.14	2.65	Tension