دورية أكاديمية
Investigation on effect of colloidal nano-silica on the strength and durability characteristics of red mud blended Portland cement paste through tortuosity ; Investigación sobre el efecto de la nanosílice coloidal en las características de resistencia y durabilidad de la pasta de cemento Portland mezclada con lodo rojo mediante estudios de tortuosidad
| العنوان: | Investigation on effect of colloidal nano-silica on the strength and durability characteristics of red mud blended Portland cement paste through tortuosity ; Investigación sobre el efecto de la nanosílice coloidal en las características de resistencia y durabilidad de la pasta de cemento Portland mezclada con lodo rojo mediante estudios de tortuosidad |
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| المؤلفون: | Athira, K., Shanmugapriya, T. |
| المصدر: | Materiales de Construcción; Vol. 72 No. 347 (2022); e293 ; Materiales de Construcción; Vol. 72 Núm. 347 (2022); e293 ; 1988-3226 ; 0465-2746 ; 10.3989/mc.2022.v72.i347 |
| بيانات النشر: | Consejo Superior de Investigaciones Científicas |
| سنة النشر: | 2022 |
| المجموعة: | Materiales de Construcción (E-Journal) |
| مصطلحات موضوعية: | Porosity, Pore structure distribution, Tortuosity, Mechanical strength, Durability, Porosidad, Distribución de la estructura porosa, Tortuosidad, Resistencias mecánicas, Durabilidad |
| الوصف: | A novel binder system for cement-based composites depending upon the strength and durability characteristics is introduced in this study. The possibility of calcined red mud cement pastes with and without colloidal nano-silica (CNS) over Ordinary Portland Cement paste (OPC) at three W/B ratios (0.3, 0.4, 0.5) is evaluated. The optimum percentage of cement replacement by red mud (15%) was selected from compressive strength values of different cement replacements (5%, 10%, 15%, and 20%). Colloidal nano-silica (CNS) was added at 0.5%, 1%, 1.5%, and 2 % to the selected red mud cement paste. Water absorption, sorptivity, resistance to sulfate attack, and resistance to acid attack tests were conducted for optimum red mud cement paste with and without CNS. The experimental results are explained based on tortuosity with empirical formulas and mathematical models of pore network distribution. The tortuosity is directly proportional to the inter-connectivity of the pores. The mixes with 15% calcined red mud and 1.5% CNS replacement performed better strength and durability at all W/B ratios. The mix (R15NS1.5) with minimum tortuosity value results in the higher overall performance of the paste. The mixes with a 0.3 W/B ratio give high-performance cement paste compared to higher W/B ratios. ; En este estudio se presenta un nuevo sistema aglomerante para compuestos en base cemento que depende de las características de resistencia y durabilidad. Se evalúa la posibilidad de incluir pastas de cemento de lodo rojo calcinado con y sin nanosílice coloidal (CNS) en pastas de cemento Portland ordinario (OPC) en tres relaciones a/b (0,3, 0,4, 0,5). El porcentaje óptimo de reemplazo de cemento por lodo rojo (15 %) se seleccionó de los valores de resistencia a la compresión obtenidos entre los diferentes reemplazos de cemento considerados (5 %, 10 %, 15 % y 20 %). Se añadió nanosílice coloidal (CNS) al 0,5 %, 1 %, 1,5 % y 2 % a la pasta de cemento de lodo rojo seleccionada. Se realizaron pruebas de absorción de agua, sorción, ... |
| نوع الوثيقة: | article in journal/newspaper |
| وصف الملف: | text/html; application/pdf; text/xml |
| اللغة: | English |
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| DOI: | 10.3989/mc.2022.01922 |
| الإتاحة: | https://doi.org/10.3989/mc.2022.01922Test https://doi.org/10.3989/mc.2022.v72.i347Test https://doi.org/10.1186/s40069-018-0258-3Test https://doi.org/10.1016/j.conbuildmat.2017.06.031Test https://doi.org/10.1016/j.jclepro.2017.11.143Test https://doi.org/10.1007/s10973-019-08095-xTest https://doi.org/10.1016/j.conbuildmat.2018.05.171Test https://doi.org/10.1016/j.jhazmat.2009.11.146Test https://doi.org/10.1016/j.jclepro.2015.09.049Test https://doi.org/10.1016/j.cemconcomp.2019.103475Test |
| حقوق: | Copyright (c) 2022 Consejo Superior de Investigaciones Científicas (CSIC) ; https://creativecommons.org/licenses/by/4.0Test |
| رقم الانضمام: | edsbas.DA4A20D2 |
| قاعدة البيانات: | BASE |
| DOI: | 10.3989/mc.2022.01922 |
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