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Design and characterization of self-compacting fibre reinforced lightweight aggregate concrete

Author(s): H. Costa, D. Esteves, E. Júlio, T. Simões
Paper category: Conference
Book title: 8th RILEM International Symposium on Fiber Reinforced Concrete: challenges and opportunities (BEFIB 2012)
Editor(s): Joaquim A.O. Barros
Print ISBN: 978-2-35158-132-2
e-ISBN: 978-2-35158-133-9
Publisher: RILEM Publications SARL
Pages: 431 - 443
Total Pages: 12
Language: English

Aiming to combine the properties of self-compacting concrete (SCC), fiber-reinforced concrete (FRC), and lightweight aggregate concrete (LWAC), resulting in a self-compacting fibre-reinforced lightweight aggregate concrete (SCFRLWAC), the experimental study herein described has been conducted. First, the mixture design method developed by the authors for self-compacting LWAC has been used to define the reference-mixture. Then, different SCFRLWAC mixtures were produced using different dosages of steel fibres. The binding paste matrix was defined by adjusting the parameters to the values commonly used in SCC and also considering the steel fibres' dosage. Optimized proportions of lightweight aggregates and normal weight sand were determined by granulometric adjustment. These mixtures were characterized both in fresh state - flowability and viscosity, passing ability and resistance to segregation - and in hardened state - compressive and tensile strengths, modulus of elasticity, flexural strength, fracture energy, punching strength, shrinkage and creep. Most relevant conclusions are presented, regarding: (i) the performance of the SCFRLWAC in terms of flowability and other typical properties of SCC; (ii) the influence of the fibres dosage; and (iii) the adjustment of the mixture to the desired density and strength by using an adequate selection of lightweight and normal weight aggregates.

Online publication: 2013
Publication Type: full_text
Public price (Euros): 0.00

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