Title: UHPFRC Composites Incorporating Hybridized Polymer Fibers: Resistance to Static and Impact Loads (Pre-Published)

Author(s): Davood Mostofinejad, Iman Moosaie, Mohamadreza Eftekhar, and Ebrahim Hesami

Publication: Materials Journal

Volume:

Issue:

Appears on pages(s):

Keywords: environmental and economic impact; flexural strength; impact resistance; polypropylene (PP)-polyvinyl alcohol (PVA) fibers; steel fiber; toughness; ultra-high-performance fiber-reinforced concrete (UHPFRC)

DOI: 10.14359/51742259

Date: 9/13/2024

Abstract:
This paper investigates the mechanical characteristics (encompassing compressive strength, flexural strength, toughness, and impact resistance) of ultra-high performance fiber-reinforced concrete (UHPFRC) incorporating polypropylene (PP) and polyvinyl alcohol (PVA) fibers. An experimental program was conducted, based on which the polymer and metallic fibers were utilized at the same fiber content, and different sets of single and hybrid fiber-reinforced composites were fabricated and tested. Despite the fact it has been exhibited through previous research that the hybridized PVA-PP fibers do not result in the development of the mechanical characteristics of engineered cementitious composites (ECC), the UHPC composites incorporating such hybrid fibers show augmented levels of toughness, flexural strength, and resistance to impact loads. A comparison was also made to assess the potentiality of the used fibers in terms of environmental impact and cost. Based on the results, hybridization with PVA and PP fibers leads to remarkable improvement in technical performance and mitigation of the economic and environmental impact of UHPFRC composites.