Improving the Interfacial Bond Properties of the Carbon Fiber Coated with a Nano-SiO₂ Particle in a Cement Paste Matrix

Figure 13

SEM images of the carbon fiber in the cement paste matrix after the pull-out test (15,000 or 1,500x). (a, b) Nano-SiO₂-coated carbon fiber with 10 wt.% SF. (c, d) Nano-SiO₂-coated carbon fiber without SF.

(a)

(b)

(c)

(d)