Improvement in concrete behavior with fly ash, silica-fume and coconut fibres

By Mehran Khan. Construction and Building Materials, 2019

250 citations recorded by the source corpus.

Abstract Concrete is one of the most widely used construction material in spite of some inherited issues (brittleness, weak in tension, etc.). A lot of effort has been made to alter concrete behavior with the help of additives e.g. cementitious material, fibres, etc. Now a days, combination of additives are gaining popularity. Researchers have studied fibre reinforced concrete, silica-fume concrete and fly ash concrete, separately; but until now, the study is not carried out on coconut fibres with addition of fly ash and silica-fume in concrete. In this work, the mechanical properties of fly ash silica-fume plain concrete (FA-SPC) and fly ash silica-fume coconut fibre reinforced concrete (FA-SCFRC) are investigated. The silica-fume content is 15%, by cement mass, with addition of 0%, 5%, 10% and 15% fly ash content, by cement mass, are added. Coconut fibres having a length of 50 mm and content of 2%, by cement mass, are added for FA-SCFRC. The stress-strain curves, load-deflection curves and load-time curves for FA-SPC and FA-SCFRC are recorded against compression, flexure and split-tension loadings, respectively. It is revealed that FA-SCFRC has generally enhanced properties than that of their respective FA-SPC. As a nutshell, FA-SCFRC with 10% fly ash content demonstrates overall best mechanical properties than that of FA-SPC.

Subfields: Building and Construction, Civil and Structural Engineering

View Paper: https://www.semanticscholar.org/paper/dda6637ab44c53ee6b8d4e058e7631a213a4104a