Self-consolidating high performance fiber reinforced concrete: SCHPFRC

Author(s): W-C. Liao, S-H. Chao, S-Y. Park, A.E. Naaman
Paper category: Workshop
Book title: Fifth International RILEM Workshop on High Performance Fiber Reinforced Cement Composites (HPFRCC5)
Editor(s): H.W. Reinhardt, A.E. Naaman
ISBN: 978-2-35158-046-2
Pages: 293 - 302
Total Pages: 10
Language: English

Abstract: 
Self-consolidating high performance fiber reinforced concrete (SCHPFRC) combines the self-consolidating property of self consolidating concrete (SCC) with the strain-hardening and multiple cracking characteristics of high performance fiber reinforced cement composites (HPFRCC) [1, 2, 3]. SCHPFRC is a highly flowable, non segregating concrete that can spread into place, fill the formwork, and encapsulate the reinforcing steel in typical concrete structures. It is being addressed as part of a project for the U.S. Network for Earthquake Engineering Simulation (NEES) with the objective to develop a SCHPFRC that can be easily manufactured and delivered by ready-mix trucks for use on the job site, with particular application in seismic resistant structures.
In this paper, the authors provide a brief summary of findings based on an extensive review of existing literature and numerous laboratory trials. Several SCHPFRC mixtures taken from previous studies were modified using the available local materials, leading to recommended mixtures with compressive strengths ranging from 35 to 65 MPa. These mixtures contain coarse aggregates having a 12 mm maximum size and 30 mm long steel fibers in volume fractions of 1.5% and 2%. The recommended SCHPFRC mixtures were achieved by adjusting the coarse to fine aggregate ratios, increasing paste volume, mixing in steps according to a pre-set procedure, and adding relevant admixtures. Spread diameter of the fresh SCHPFRC mixtures measured by using the standard slump flow test was approximately 600 mm. Results obtained from direct tensile tests showed that the strain-hardening response of the hardened composites were maintained up to large composite strains.

Online publication: 2014
Publication Type: full_text
Public price (Euros): 0.00