Development of an HPFRC for Use in Flat Slabs

• Type: Article in International Conference Proceedings Book
• Date: 2021

Authors

Julia Blazy (Author) Other; Sandra Nunes (Author) FEUP; Carlos Sousa (Author) FEUP; Mário Jorge Pimentel (Author) FEUP

Conference proceedings International

Title: RILEM Bookseries

Pages: 209-220

RILEM-fib International Symposium on FRC, BEFIB 2020

21 September 2020 through 23 September 2020

Indexing

Scopus - 1 Citation

Other information

Authenticus ID: P-00S-ZYJ

DOI: 10.1007/978-3-030-58482-5_19

Abstract (EN): 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. © 2021, RILEM.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 12