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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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Ibrahim, Mohammed
in Cooperation with on an Cooperation-Score of 37%
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Publications (7/7 displayed)
- 2024Evaluating long-term durability of nanosilica-enhanced alkali-activated concrete in sulfate environments towards sustainable concrete developmentcitations
- 2023New Hybrid PVC/PVP Polymer Blend Modified with Er2O3 Nanoparticles for Optoelectronic Applicationscitations
- 2023An overview of factors influencing the properties of concrete incorporating construction and demolition wastescitations
- 2023Evaluating mechanical, microstructural and durability performance of seawater sea sand concrete modified with silica fumecitations
- 2022Engineered and green natural pozzolan-nano silica-based alkali-activated concretecitations
- 2021Assessment of acid resistance of natural pozzolan-based alkali-activated concretecitations
- 2019Influence of composition and concentration of alkaline activator on the properties of natural-pozzolan based green concretecitations
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article
Influence of composition and concentration of alkaline activator on the properties of natural-pozzolan based green concrete
Abstract
<p>The chemical constituents of precursor materials, the composition and concentration of alkaline activators, volume of free water, and curing conditions are some of the mix design variables that influence the fresh and hardened properties of alkali-activated binders (AABs). To achieve desirable engineering properties and long-term performance of an AAB under various exposure conditions, each of these variables has to be carefully controlled. The reported research focused on the influence of concentration and composition of alkaline activators on the properties of natural pozzolan (NP)-based AAB. Since the molarity of sodium hydroxide (SH) and the ratio of sodium silicate (SS) to sodium hydroxide (SH) influence the properties of an AAB, the NP-based AABs were prepared by varying the SS to SH ratio from 2.0 to 2.75, at an increment of 0.25, and the molarity of SH from 8 to 14. The developed AAC specimens were tested to evaluate the strength development and the binder was characterized using SEM, XRD and FTIR techniques. A SS/SH ratio of 2.5 and 14 M SH solution were required to obtain maximum strength and dense microstructure. In addition, it was established that there exists an optimum silica modulus of the combined activator that results in faster polymerization of the precursor material.</p>