Durability of Carbon Fiber Reinforced Cements in Acidic Environments


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Title: Durability of Carbon Fiber Reinforced Cements in Acidic Environments

Author(s): Nemkumar Banthia and Jiakang Sheng

Publication: Special Publication

Volume: 126


Appears on pages(s): 837-850

Keywords: carbon fibers; cements; durability; inorganic acids; reinforced cements; Materials Research

Date: 8/1/1991

The strength and toughness durability of carbon fiber reinforced cements (CFRC) in inorganic acidic environments was investigated by subjected prismatic flexural specimens (15 x 15 x 150 mm) to two acidic environments (H2 and HNO4) at the age of 28 days for up to 90 days. The pH of the two acids was maintained at 4.0. Eight CFRC mixes and three volume fractions of pitch-based carbon fibers were investigated. It was concluded that while plain unreinforced cements had considerable retrogression in their mechanical properties, carbon fiber reinforced cements had no appreciable effect on either the strength or the toughness, at least for the duration of exposure investigated.