Optimum steel fiber content of high strength pozzolime concrete

الملخص EN

Pozzolime is a promising alternative binder, compared to Portland cement becauseof its low CO2 emission.

it is produced by mixing hydrated lime, silica fume, andfly ash.

Fiber is added to concrete to improve the durability, mechanical propertiesof the structure, and others.

In this study, high-strength Pozzolime concrete wasreinforced with hooked-end steel fiber which was added as fractions of volume of0.5, 1, 1.5, and 2% .

Optimization for fiber content was performed according to theworkability and strength of the fiber-reinforced mixture.

Obtained results showedthat the compressive strengths at 14d and 90d increased by 71.4% and 58.3% respectively when adding 1.5% steel fiber.

Correspondingly, the 14d, 28d, and 90dflexural strength of pozzolime concrete increased by 170.4% , 203.2% , and 191.4% respectively at 1.5% and a further increase in fiber content caused a reduction instrength.

The finding presented in this research confirmed that the volume fraction(1.5% ) can be considered as the optimum Pozzolime is a promising alternative binder, compared to Portland cement becauseof its low CO2 emission.

it is produced by mixing hydrated lime, silica fume, andfly ash.

Fiber is added to concrete to improve the durability, mechanical propertiesof the structure, and others.

In this study, high-strength Pozzolime concrete wasreinforced with hooked-end steel fiber which was added as fractions of volume of0.5, 1, 1.5, and 2% .

Optimization for fiber content was performed according to theworkability and strength of the fiber-reinforced mixture.

Obtained results showedthat the compressive strengths at 14d and 90d increased by 71.4% and 58.3% respectively when adding 1.5% steel fiber.

Correspondingly, the 14d, 28d, and 90dflexural strength of pozzolime concrete increased by 170.4% , 203.2% , and 191.4% respectively at 1.5% and a further increase in fiber content caused a reduction instrength.

The finding presented in this research confirmed that the volume fraction(1.5% ) can be considered as the optimum content