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Comparative study of effect hot climate and conventional water on strength development of SFR-SCMs using natural pozzolana replacement

Comparative study of effect hot climate and conventional water on strength development of... Abstract The present paper intends to study the influence of hot climate curing on strengths development of sisal fiber-reinforced self-compacting mortars (SFR-SCMs), with a view to repairing concrete structures. Hot climate environment was compared to conventional water curing in a period up to 56 days. Five SFR-SCMs mixes containing 0%, 10%, 20%, 30%, and 40% of natural pozzolana (NP) as Portland cement (CEMII/A-L 42.5 N) replacement were made and then subjected to these curing environments. In addition, for curing durations of 2–7, all samples cured via hot climate were sprayed with fresh water twice a day. The obtained results encourage the use of the spraying method, because it was effective to counteract the detrimental effect of hot climate on continuation of hydration and strength development, which allowed to reach the minimum required 28-day strength for class R3, repair materials (EN 1504-3). However, samples containing up to 20% NP cured under conventional water reached the minimum required 28-day strength for class R4. For curing durations of 28–56 days, the compressive strength of specimens cured via conventional water increased considerably due to the pozzolanic reactions, but, that of samples cured via hot climate, slightly decreased due to moisture loss. Furthermore, a regression analysis was performed to establish a mathematical relationship between flexural and compressive strengths of SFR-SCMs. Study results indicate that the coefficient of determination (R2) may reach 0.90, indicating that the proposed method is suitable for predicting flexural strength from compressive strength, under the chosen curing environments. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png "Asian Journal of Civil Engineering" Springer Journals

Comparative study of effect hot climate and conventional water on strength development of SFR-SCMs using natural pozzolana replacement

Benyahia, Amar
"Asian Journal of Civil Engineering" , Volume 20 (8): 9 – Dec 1, 2019
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Publisher
Springer Journals
Copyright
2019 Springer Nature Switzerland AG
ISSN
1563-0854
eISSN
2522-011X
DOI
10.1007/s42107-019-00176-4
Publisher site
See Article on Publisher Site

Abstract

Abstract The present paper intends to study the influence of hot climate curing on strengths development of sisal fiber-reinforced self-compacting mortars (SFR-SCMs), with a view to repairing concrete structures. Hot climate environment was compared to conventional water curing in a period up to 56 days. Five SFR-SCMs mixes containing 0%, 10%, 20%, 30%, and 40% of natural pozzolana (NP) as Portland cement (CEMII/A-L 42.5 N) replacement were made and then subjected to these curing environments. In addition, for curing durations of 2–7, all samples cured via hot climate were sprayed with fresh water twice a day. The obtained results encourage the use of the spraying method, because it was effective to counteract the detrimental effect of hot climate on continuation of hydration and strength development, which allowed to reach the minimum required 28-day strength for class R3, repair materials (EN 1504-3). However, samples containing up to 20% NP cured under conventional water reached the minimum required 28-day strength for class R4. For curing durations of 28–56 days, the compressive strength of specimens cured via conventional water increased considerably due to the pozzolanic reactions, but, that of samples cured via hot climate, slightly decreased due to moisture loss. Furthermore, a regression analysis was performed to establish a mathematical relationship between flexural and compressive strengths of SFR-SCMs. Study results indicate that the coefficient of determination (R2) may reach 0.90, indicating that the proposed method is suitable for predicting flexural strength from compressive strength, under the chosen curing environments.

Journal

"Asian Journal of Civil Engineering" – Springer Journals

Published: Dec 1, 2019

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