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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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Arum, Chinwuba
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Topics
Publications (8/8 displayed)
- 2023Effects of sodium carbonate admixture and mix design ratios on the compressive strength of concretecitations
- 2023Workability and compressive strength of concrete containing binary cement, mixed fines, and superplasticizercitations
- 2023Comparison between the Compressive Strength of Binary and Ternary Alkaline-activated Pozzolanic Concretecitations
- 2023Potential of Calcined and Uncalcined Termite Mounds as Pozzolans in Concrete Mixcitations
- 2023Workability and durability analysis of waste based geopolymer concrete
- 2022The highs and lows of incorporating pozzolans into concrete and mortar: A review on strength and durabilitycitations
- 2022Strength and Durability Assessments of Induction Furnace Slag - Quarry Dust -Based High Performance Self - Compacting Concretecitations
- 2021Fresh Characteristics of High-Performance Self-Compacting Concrete using Induction Furnace Slag as Supplementary Cementitious Materialcitations
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article
Effects of sodium carbonate admixture and mix design ratios on the compressive strength of concrete
Abstract
<jats:p>This study aimed to investigate the impact of sodium carbonate (Na2CO3) admixture on the acceleration and long-term compressive strength of ordinary Portland cement (OPC) concrete at different mix ratios. Concrete cube specimens (150 × 150 × 150mm3 size) were cast at three different mix ratios (1:1.5:3, 1:2:4, and 1:3:6) with sodium carbonate admixture added in increasing dosage of 0.5% from 0 to 2.0% by weight of OPC. Compressive strength tests were conducted on the cast specimens after curing under water for 7, 28, 56 and 90days. Additionally, tests were done to see how sodium carbonate would accelerate setting times of OPC paste. The results of the tests showed that Na2CO3 decreased the initial and final setting times of cement paste from 96 to 67mins and 543 to 387mins respectively. Compressive strength test results for 1:2:4 and 1:3:6 mix ratios showed an increasing trend up to 1.0% Na2CO3 admixture, after which there was a decrease. Meanwhile, 1:1.5:3 mix ratio showed a decrease in strength from 21.87 N/mm2 at 0% to 14.90 N/mm2 at 1.0% Na2CO3 addition, after which the strength increased with Na2CO3 percent addition. These results suggest that sodium carbonate has an accelerating effect on concrete setting time, and may aid its early strength development, but has negative long-term effects on concrete strength with increasing dosage. An optimal percentage of 1% Na2CO3 by weight of OPC is advised for accelerating effects in concrete, based on the results of this study.</jats:p>