Carbon fiber reinforced mortar as an electrical contact material for cathodic protection
- State Univ. of New York, Buffalo, NY (United States). Composite Materials Research Lab.
For a joint between old plain mortar and new mortar (which serves as an electrical contact material for cathodic protection of steel-reinforced old mortar), short carbon fiber addition to the new mortar was found to decrease both the contact resistivity and the new mortar`s volume resistivity. Whether the new mortar contained fibers or not, the contact resistance was higher than the new mortar`s volume resistance perpendicular to the contact and was lower than the new mortar`s volume resistance parallel to the contact. In the presence of latex, the volume resistivity was 3.1 {times} 10{sup 5}, 1.4 {times} 10{sup 3} and 1.2 {times} 10{sup 2} {Omega}{center_dot}cm and the contact resistivity was 5.9 {times} 10{sup 6}, 2.7 {times} 10{sup 5} and 2.6 {times} 10{sup 4} {Omega}{center_dot}cm{sup 2} at fiber contents of 0, 0.53 and 1.1 vol.% respectively. Latex addition alone to the new mortar increased slightly both contact resistivity and new mortar`s volume resistivity. All resistivities increased very slightly with curing age.
- OSTI ID:
- 63236
- Journal Information:
- Cement and Concrete Research, Vol. 25, Issue 4; Other Information: PBD: May 1995
- Country of Publication:
- United States
- Language:
- English
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