Theoretical and experimental analysis of multifunctional high performance cement mortar matrices reinforced with varying lengths of carbon fibers

R. A. Khushnood; S. Muhammad; S. Ahmad; J. M. Tulliani; M. U. Qamar; Q. Ullah; S. A. Khan; A. Maqsom

doi:10.3989/mc.2018.09617

Authors

R. A. Khushnood NUST Institute of Civil Engineering, National University of Sciences & Technology https://orcid.org/0000-0002-9532-4096
S. Muhammad NUST Institute of Civil Engineering, National University of Sciences & Technology https://orcid.org/0000-0003-2180-1723
S. Ahmad Department of Building and Architectural Engineering, Bahauddin Zakariya University https://orcid.org/0000-0002-1139-8726
J. M. Tulliani Department of Applied Science & Technology, Politecnico di Torino https://orcid.org/0000-0003-2419-4383
M. U. Qamar Department of Irrigation & Drainage, Faculty of Agricultural Engineering & Technology, University of Agriculture https://orcid.org/0000-0003-3341-2581
Q. Ullah NUST Institute of Civil Engineering, National University of Sciences & Technology https://orcid.org/0000-0002-4602-5428
S. A. Khan Abasyn University, https://orcid.org/0000-0003-4293-5907
A. Maqsom Comsats Institute of Information Technology https://orcid.org/0000-0002-3745-516X

DOI:

https://doi.org/10.3989/mc.2018.09617

Keywords:

Fiber reinforcement, Mortar, Flexural strength, Compressive strength, Microcracking

Abstract

An effective scheme to formulate high performance and multifunctional cement based mortar composites reinforced with varying lengths of carbon fibers has been devised. The detailed investigations pertaining to the fracture response of composites in cracks initiation and progression phases, their conducting mechanism and volumetric stability were performed with varying loads of 6mm and 12mm long carbon fibers at two different w/c ratios i.e. 0.45 and 0.50. The experiments concluded that an optimum addition of carbon fibers results in substantial improvement of fracture properties alongside significant reduction in electrical resistivity and total plastic shrinkage. The field emission scanning electron microscopy of the cryofractured specimen revealed crack arresting actions of uniformly distributed carbon fibers through successful crack bridging and branching phenomenon.

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