Development of an HPFRC for Use in Flat Slabs

Julia Blazy, Sandra Nunes*, Carlos Sousa, Mário Pimentel

*Corresponding author for this work

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review

2 Citations (Scopus)

Abstract

Fibre-reinforced cementitious materials represent one of the most significant developments in the field of concrete technology of the last decades. The improved performance of this new class of materials (in terms of workability, compressive strength, flexural/tensile behaviour and/or durability) allows rethinking several of the existing structural solutions. This paper describes research on high-performance fibre reinforced concrete (HPFRC) to be used at the slab-column connection zones of flat slabs, in order to improve its punching shear resistance. Design of Experiments (DoE) approach was used to design HPFRC paste and aggregate particle phases. As such, a central composite design was carried out to mathematically model the influence of mixture parameters and their coupled effects on deformability, viscosity and compressive strength. After that, a numerical optimization technique was applied to the derived models to select the best mixture, which simultaneously, maximizes aggregates content and allows achieving a compressive strength of 90–120 MPa, while maintaining self-compactability (SF1 + VS2), incorporating 1% steel fibres content.

Original languageEnglish
Title of host publicationFibre Reinforced Concrete
Subtitle of host publicationImprovements and Innovations - RILEM-fib International Symposium on FRC BEFIB in 2020
EditorsPedro Serna, Aitor Llano-Torre, José R. Martí-Vargas, Juan Navarro-Gregori
PublisherSpringer
Pages209-220
Number of pages12
ISBN (Print)9783030584818
DOIs
Publication statusPublished - 2021
Externally publishedYes
EventRILEM-fib International Symposium on FRC, BEFIB 2020 - Valencia, Spain
Duration: 21 Sep 202023 Sep 2020

Publication series

NameRILEM Bookseries
Volume30
ISSN (Print)2211-0844
ISSN (Electronic)2211-0852

Conference

ConferenceRILEM-fib International Symposium on FRC, BEFIB 2020
Country/TerritorySpain
CityValencia
Period21/09/2023/09/20

Keywords

  • Flexural behaviour
  • High-Performance Fibre Reinforced Concrete (HPFRC)
  • Mix-design
  • Self-compacting
  • Steel fibres

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