Abstract
The goal of this research is to better understand the stress-strain behaviour of plain and fibre reinforced M30 grade plain SCC mixtures. The experimental stress strain relationship of SCC revealed that all changes had a minor effect on the stress strain curve's first section. The stress-strain behaviour of M30 FRSCC mixtures has improved with the addition of fibres, resulting in lower stress values for the same stresses. At peak loads, all fibre reinforced SCC mixes, notably SFRSCC and HFRSCC mixes, showed an increase in strain values. Steel and hybrid fibres enhanced the post-peak stress-strain behaviour of SCC mixes compared to glass fibered SCC mixes. M30 grades’ modulus of elasticity When compared to other FRSCC mixes, HFRSCC mixes created with optimal combinations of PF and s/a ratios have high values. By dispersing deformation energy through fibres, HFRSCC mixtures have a better capacity to prevent fracture growth. HFRSCC mixtures with high toughness moduli have better shock resistance. Because of the dense and compact microstructure, the modulus of elasticity (E) of HFRSCC mixes shows improved performance.
Highlights
European Federation of National Associations Representing for Concrete (EFNARC)(2002) has developed specifications and guidelines for the use of self-compacting concrete (SCC) that covers a number of topics ranging from material selection and mixture design to the significance of the testing methods
The experimental stress strain relationship of SCC revealed that all changes had a minor effect on the stress strain curve's first section
The stress-strain behaviour of M30 FRSCC mixtures has improved with the addition of fibres, resulting in lower stress values for the same stresses
Summary
European Federation of National Associations Representing for Concrete (EFNARC)(2002) has developed specifications and guidelines for the use of SCC that covers a number of topics ranging from material selection and mixture design to the significance of the testing methods. The main disadvantage of SCC is the high cost associated with the use of chemical admixtures and high volumes of Portland cement. SCC can be obtained by increasing the fine aggregate content; by limiting the maximum aggregate size; by increasing the powder content; by using viscosity modifying admixtures (VMA) and reducing the water-to-binder ratio through superplasticizer (SP)
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