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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Maslehuddin, Mohammed
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (9/9 displayed)
- 2023Strategies for strengthening of corroded reinforced concrete beams using <scp>CFRP</scp> laminates and <scp>UHPC</scp> jacketingcitations
- 2021Effect of alkaline activator ratio on the compressive strength response of POFA-EACC mortar subjected to elevated temperaturecitations
- 2020Ensemble machine learning model for corrosion initiation time estimation of embedded steel reinforced self-compacting concretecitations
- 2019Influence of composition and concentration of alkaline activator on the properties of natural-pozzolan based green concretecitations
- 2018Efficiency of generic and proprietary inhibitors in mitigating Corrosion of Carbon Steel in Chloride-Sulfate Environments
- 2018Efficiency of generic and proprietary inhibitors in mitigating Corrosion of Carbon Steel in Chloride-Sulfate Environments.citations
- 2018Efficiency of corrosion inhibitors in mitigating corrosion of steel under elevated temperature and chloride concentrationcitations
- 2017POFA-engineered alkali-activated cementitious composite performance in acid environmentcitations
- 2014Mechanical properties and durability characteristics of SCC incorporating crushed limestone powdercitations
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article
POFA-engineered alkali-activated cementitious composite performance in acid environment
Abstract
<p>The durability performance of palm oil fuel ash engineered alkali-activated cementitious composite (POFA-EACC) mortar exposed to different acid solutions is assessed in this study. 50 mm cubic specimens used for the study were prepared from 100% POFA, alkali-activator (Na<sub>2</sub>SiO<sub>3</sub><sub>(aq)</sub>/NaOH<sub>(aq)</sub>) ratios of 2.5, different molarities (10, 12 and 14 M) of NaOH<sub>(aq)</sub> and 2% volume fraction of polyvinyl alcohol (PVA) fibres. Specimens were exposed to 10% H<sub>2</sub>SO<sub>4</sub><sub>(aq)</sub>, 10% HNO<sub>3</sub><sub>(aq)</sub> and 10% HCl<sub>(aq)</sub> at pH of 0.56, 0.52 and 0.42 respectively for 3, 6 and 9 months, with unexposed specimens as control. Small changes in compressive strength were identified with POFA mortar specimens during exposure to H<sub>2</sub>SO<sub>4</sub><sub>(aq)</sub>, while exposure to HNO<sub>3</sub><sub>(aq)</sub> and HCl<sub>(aq)</sub> greatly reduced the strength of the POFA mortar specimens. The results were supported through microstructural examinations using SEM, while the characterization was done using XRD and FTIR. The high resistance of POFA-EACC mortar to H<sub>2</sub>SO<sub>4</sub><sub>(aq)</sub> is the contribution received through the formation of gypsum, which hinders the infiltration of more acids into the matrix microstructure.</p>