Flexural Behavior of Cementitious Composites Reinforced by Pitch-Based High Modulus Continuous Carbon Fibers

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Title: Flexural Behavior of Cementitious Composites Reinforced by Pitch-Based High Modulus Continuous Carbon Fibers

Author(s): Takashi Yamada, Kanji Yamada, and Kenji Kubomura

Publication: Special Publication

Volume: 138

Issue:

Appears on pages(s): 267-286

Keywords: carbon; composite materials; fibers; flexural strength; mechanical properties; reinforced concrete; Materials Research

Date: 9/1/1993

Abstract:
The potential of using pitch-based high-modulus carbon fiber was investigated as a reinforcement in cementitious composites for structurally reinforced concrete members. For this purpose, effects of carbon fiber mechanical properties on the mechanical properties of carbon fiber reinforced cementitious composites were studied through the three-point flexural test by using several pitch-based high-modulus carbon fiber rods of varying fiber moduli and strengths. For the specimens with a fiber volume fraction larger than the critical volume fraction, the flexural strength is found to exceed the mortar mix strength and is linearly proportional to the sum of all rod strengths, and the flexural modulus after matrix cracking is found to also be linearly proportional to the sum of all rod stiffnesses. 111-493