TY - GEN
T1 - Development of an HPFRC for Use in Flat Slabs
AU - Blazy, Julia
AU - Nunes, Sandra
AU - Sousa, Carlos
AU - Pimentel, Mário
PY - 2021
Y1 - 2021
N2 - 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.
AB - 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.
KW - Flexural behaviour
KW - High-Performance Fibre Reinforced Concrete (HPFRC)
KW - Mix-design
KW - Self-compacting
KW - Steel fibres
UR - http://www.scopus.com/inward/record.url?scp=85097219836&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-58482-5_19
DO - 10.1007/978-3-030-58482-5_19
M3 - Conference contribution
AN - SCOPUS:85097219836
SN - 9783030584818
T3 - RILEM Bookseries
SP - 209
EP - 220
BT - Fibre Reinforced Concrete
A2 - Serna, Pedro
A2 - Llano-Torre, Aitor
A2 - Martí-Vargas, José R.
A2 - Navarro-Gregori, Juan
PB - Springer
T2 - RILEM-fib International Symposium on FRC, BEFIB 2020
Y2 - 21 September 2020 through 23 September 2020
ER -