Experimental investigation into the properties of self‐compacting rubberised concrete incorporating polypropylene and steel fibers

Self Cite

Self-compacting concrete (SCC) is a cementitious composite which serves complex formworks without mechanical vibrations with superior deformability and high resistance to segregation. Besides, the recycled aggregate concrete (RAC) is also developing rapidly and along with the ever-increasing sustainable demand for infrastructure. The combination of the fibers, RAC, and SCC may create advantages for the construction industry. In this study, the polypropylene (PP) fiber at 0.1, 0.15, 0.2, and 0.25% volume fractions and steel fibers at 0.25, 0.5, 0.75, and 1% volume fractions are introduced into fiber-reinforced recycled aggregate selfcompacting concrete (FR-RASCC). Both fresh property and hardened mechanical performance, comprising compressive and tensile strengths and modulus of elasticity are analyzed. The fibers validate the optimal 0.1% volume fraction for PP fiber and 0.75% volume fraction for steel fiber. In addition, the results are proved to enhance the mechanical properties and reduce cracking despite the negative impact on the fresh property. Moreover, the experimental outcomes are compared with previous researches to establish the linear model, demonstrating the relationship between fiber fraction and the mechanical properties. K E Y W O R D Sfiber-reinforced recycled aggregate self-compacting concrete, polypropylene fibers, recycled aggregate concrete, self-compacting concrete, steel fibers

R . I . = V_{f} \times l_{f} / d_{f}

where R.I .…”

Section: Analytical Modelsmentioning

confidence: 99%

Experimental analysis of fiber‐reinforced recycled aggregate self‐compacting concrete using waste recycled concrete aggregates, polypropylene, and steel fibers

Aslani

Hou

Nejadi

et al. 2019

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“…Generally, the PP fiber enhances the tensile performing but give varying effect upon compressive strength. The rule is validated not only out own findings but also other studies …”

Section: Resultsmentioning

confidence: 55%

Fiber‐reinforced lightweight self‐compacting concrete incorporating scoria aggregates at elevated temperatures

Aslani

Sun

Bromley

et al. 2019

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Self‐compacting concrete (SCC) has developed rapidly in modern concrete structures to accommodate the need of high deformability and considerable resistance to segregation. The lightweight aggregate called scoria is also utilized to manufacture lightweight self‐compacting concrete (LWSCC) to improve the strength‐to‐weight ratio with considerable cost beneficial. Meanwhile, the LWSCC employs fibers (polypropylene [PP] and steel) equipping different replacement ratios of traditional aggregates, the SCC will be invented to reveal balanced fresh property, spalling behavior, mechanical performance especially at elevated temperatures. In this study, eight LWSCC mix designs were explored with varying fiber ratios by volume of PP fiber (0.1, 0.15, 0.20, and 0.25%) and steel fiber (0.25, 0.5, 0.75, and 1.0%). The effects of different fiber types and ratios are tested with fresh properties (slump flow and J‐ring), hardened mechanical performance (compressive and tensile strength at 20°C) and high temperature resistance (compressive and tensile strength, mass loss and spalling) after 28‐day curing at 100, 300, 600, and 900°C. The 0.25% optimum fiber ratio for PP fiber mix and 0.75% for steel fiber mix are determined with balanced fresh properties as well as high‐temperature resistance for the hardened properties.

“…The reduction is significant at a fiber content of 0.15%. The detrimental effect of Polypropylene fibers on workability is also highlighted by Aslani and Nejadi …”

Section: Resultsmentioning

confidence: 81%

Reusing granite sawing waste in self‐compacting concrete with polypropylene fiber at low‐volume fractions

Karmegam

Arunachalam²

2018

This study aims to experimentally investigate the possibilities of reusing Granite Sawing waste (GSW) in Fibre Reinforced Self Compacting Concrete (FRSCC) using Polypropylene (PP) fibers. The effectiveness of GSW at 5, 10, 15, and 20% by weight instead of cement was investigated. The PP fibers were used at volume fractions of 0.05, 0.1, and 0.15%. In order to study the microstructure and to identify the elements of the FRSCC, SEM was used. Fresh and hardened properties were evaluated. Flyash was used as an additional mineral admixture while superplasticizer was also added to achieve required flow parameters. The GSW along with PP fibers increases the compressive strength of FRSCC. An improvement in splitting tensile strength was also observed.