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CARBONLETT, vol. 23, no. 1, pp.22-29, 2017

DOI: http://dx.doi.org/ DOI:10.5714/CL.2017.23.022

Mechanical and electrical properties of cement paste incorporated with pitch-based carbon fiber

Inkyu Rhee1, Jin Hee Kim2, Sang Hee Park3, Sungho Lee4, Bong Ryeul Ryu5,♠ and Yoong Ahm Kim5,♠

Affiliation: 1Department of Civil Engineering, Chonnam National University, Gwangju 61186, Korea
2Faculty of Engineering, Chonnam National University, Gwangju 61186, Korea
3Project Group R&D Center, GS Caltex Corporation, Daejeon 34122, Korea
4Carbon Composite Materials Research Center, Korea Institute of Science and Technology (KIST), Wanju 55324, Korea 5School of Polymer Science and Engineering, Chonnam National University, Gwangju 61186, Korea

Abstract: The compressive strength and electrical resistance of pitch-based carbon fiber (CF) in cementitious materials are explored to determine the feasibility of its use as a functional material in construction. The most widely used CFs are manufactured from polyacrylonitrile (PAN-based CF). Alternatively, short CFs are obtained in an economical way using pitch as a precursor in a melt-blown process (pitch-based CF), which is cheaper and more eco-friendly method because this pitch-based CF is basically recycled from petroleum residue. In the construction field, PAN-based CFs in the form of fabric are used for rehabilitation purposes to reinforce concrete slabs and piers because of their high mechanical properties. However, studies have revealed that construction materials with pitch-based CF are not popular. This study explores the compressive strength and electrical resistances of a cement paste prism using pitch-based CF.

Keyword: pitch-based carbon fiber, compressive strength, electrical resistance, polarization, cement paste