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中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 1    January 2018

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Tensile properties of strain-hardening cementitious composites containing polyvinyl-alcohol fibers hybridized with polypropylene fibers
H. R. Pakravan1, M. Jamshidi2

1. Young Researchers and Elite Club, Central Tehran Branch, Islamic Azad University, Tehran, Iran; 2. School of Chemical Engineering, Iran University of Science and Technology (IUST), Tehran, Iran

Abstract:Partially replacing polyvinyl-alcohol (PVA) fibers with polypropylene (PP) fibers in strain-hardening cementitious composites (fiber hybridization) modify certain mechanical properties of these materials. The hybridization based on the introduction of low-modulus hydrophobic polypropylene fibers improves the ductility and the strain-hardening behavior of the cementitious composites containing polyvinyl-alcohol fibers of different types (PVA-SHCC). Pull-out tests indicate that adding PP fibers increases the energy capacity of the hybrid composite with respect to the material containing only PVA fibers under tensile loading, and PP-fiber geometry (i.e., section shape and length) is a key factor in enhancing the strain capacity.

 

Key words: polyvinyl-alcohol (PVA); strain-hardening cementitious composite (PVA-SHCC); fiber hybridization; tensile strain capacity; ultimate tensile strength; PVA fiber; poly propylene fiber

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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