Effect of External Sulphates on Properties of  Lime-Pozolana Concrete

Al-Attar, Tareq; Mehdi, Basil Salah; Hattab, Mohammed Frayyeh; Prof., Building; MSc.Student, Construction Building

doi:10.31272/jeasd.23.5.4

Cited by 1 publication

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“…Lime could be regarded as an environmentally-sound binder because of its low energy requirements, minimal CO 2 emissions during manufacturing, and CO 2 preoccupation via carbonation during setting [2]. 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.…”

Section: Introductionmentioning

confidence: 99%

Optimum Steel Fiber Content of High Strength Pozzolime Concrete

Al-Zuheriy¹,

Hamza²

2021

ETJ

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Pozzolime concrete was reinforced with hooked-end steel fiber at (0.5,1.0 ,1.5, and 2) percent volume fractions.• The presence of steel fibers has a significant negative effect on the workability of all volume fractions tested. • The maximum compressive and flexural strength was acquired, with the addition of 1.5 percent. • The 1.5 percent volume fraction could be considered as the optimum fiber content.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.

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Section: Introductionmentioning

confidence: 99%