Interface Bond Characterization between Fiber and Cementitious Matrix

Table 5

Summary of test results.

I.D.	(mm)	δ (mm)	Initial stiffness (N/mm)	Peak pull-out load (N)
0.4C3.0	0.098	0.150	3.940	0.616
0.4C1.5	0.088	0.143	3.700	0.460
0.4C1.0	0.093	0.137	2.380	0.340
0.5C3.0	0.110	0.222	3.613	0.603
0.5C1.5	0.109	0.150	2.756	0.503
0.5C1.0	0.100	0.155	2.241	0.309
0.4P7.5	0.276	1.316	2.252	0.405
0.4P5.0	0.310	0.918	0.777	0.306
0.4P3.75	0.277	0.735	0.870	0.228
0.5P7.5	0.323	1.763	2.346	0.374
0.5P5.0	0.386	1.288	0.711	0.298
0.5P3.75	0.279	0.703	1.096	0.199
0.4S15	0.226	0.443	845.1	207.4
0.4S7.5	0.302	0.465	391.6	171.85
0.5S15	0.250	0.408	510.0	170.44
0.5S7.5	0.284	0.552	349.3	135.76

Note: δ is the pull-out displacement; corresponds to the displacement at which full debonding is completed.