Tensile properties of strain-hardening cementitious composites containing polyvinyl-alcohol fibers hybridized with polypropylene fibers

• Published in: Journal of Central South University Vol. 25; no. 1; pp. 51 - 59
• Main Authors: Pakravan, H. R., Jamshidi, M.
• Format: Journal Article
• Language: English
• Published: Changsha Central South University 01.01.2018; Springer Nature B.V
• Subjects: Alcohol; Cements; Deformation; Engineering; Fibers; Mechanical properties; Metallic Materials; Polymer matrix composites; Polypropylene; Polyvinyl alcohol; Strain hardening; Tensile properties; PVA fiber; poly propylene fiber; strain-hardening cementitious composite (PVA-SHCC); 纤维杂交; 极限抗拉强度; fiber hybridization; polyvinyl-alcohol (PVA); 聚丙烯纤维; ultimate tensile strength; 聚乙烯醇(PVA); 拉伸应变能力; 应变硬化胶凝复合材料(PVA-SHCC); 聚乙烯醇纤维; tensile strain capacity
• ISSN: 2095-2899; 2227-5223
• DOI: 10.1007/s11771-018-3716-9

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.