Abstract
Pozzolime is a promising alternative binder, compared to Portland cement because of its low CO2 emission. it is produced by mixing hydrated lime, silica fume, and fly ash. Fiber is added to concrete to improve the durability, mechanical properties of the structure, and others. In this study, high-strength Pozzolime concrete was reinforced with hooked-end steel fiber which was added as fractions of volume of 0.5, 1, 1.5, and 2%. Optimization for fiber content was performed according to the workability and strength of the fiber-reinforced mixture. Obtained results showed that 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 90d flexural 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 in strength. The finding presented in this research confirmed that the volume fraction (1.5%) can be considered as the optimum content.
Highlights
In recent years, global interest in sustainable constructional materials and environmentally friendly is grown
The conceptualize of Pozzolime is based on the pozzolanic reaction between supplementary cementations materials, SCM and calcium hydroxide to produce calcium silicate hydrates similar to that produced by Portland cement hydration
The slump test was carried out on fresh mixes to investigate the effect of steel fiber reinforcement on the workability of Pozzolime concrete
Summary
Global interest in sustainable constructional materials and environmentally friendly is grown. Lime-natural Pozzolana is a building material was used in masonry a long time ago [3]. Due to their slow setting and hardening, the usage of lime-natural pozzolana has been discontinued throughout the history of inorganic binders. Since Portland cement are quick to set and had high strength in the early ages, utilization of natural pozzolan-lime binding material was drastically reduced after its invention in the 19th century. In the last 50 years, the environmental consequences of the Portland cement manufacturing process had prompted an increase in interest in lime-natural pozzolan cement [4]. The conceptualize of Pozzolime is based on the pozzolanic reaction between supplementary cementations materials, SCM and calcium hydroxide to produce calcium silicate hydrates similar to that produced by Portland cement hydration.
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