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| Формат: | Recurso digital |
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| Опубліковано: |
Zenodo
2021
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| Предмети: | |
| Онлайн доступ: | https://doi.org/10.5281/zenodo.18620128 |
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Зміст:
- Self-compacting concrete is a development of conventional concrete, where the use of vibrators for compaction is no more required. The utilization of industrial by-products is gaining momentum with increasing environmental awareness and the need to mitigate hazardous effects of industrial wastes. The paper focused on the feasibility of substituting the ordinary Portland cement with waste supplementary cementing materials that is, fly ash and silica fume. Four mixes were prepared with proportions of 10% and 15% of fly ash and silica fume by weight of cement in to be compared with a reference mix with 100% Portland cement. Some specimens were cured in water for 7 and 28 days, the other specimens were left in air for 28 days. compressive strength test, splitting tensile strength test and flexural strength test were performed after curing in water and air. The slump flow, V-funnel and segregation resistance test are carried out on the fresh self-compacting concrete. Test results have reflected that the compressive strength, tensile strength and flexural strength achieved maximum increase with 15% silica fume as a partial replacement of cement. Compressive strength and flexural strength increased with 15% silica fume by 12.82% and 19.2%, respectively at 28 days age compared to compressive strength and flexural strength of control mix. There is significant development in mechanical properties for mixes prepared with fly ash and silica fume compared to control mix. The mechanical properties of self-compacting concrete were higher for all specimens cured in water than those cured in air at age of 28 days.