Influence of nano- and micro-silica additions on the durability of a high-performance self-compacting concrete

Massana, J.; Reyes, E.; Bernal, J.; León, Néstor; Sánchez-Espinosa, Elvira

doi:10.1016/j.conbuildmat.2017.12.100

Cited by 98 publications

(25 citation statements)

References 34 publications

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“…Thus, the CNS forms a dense OPC mixture matrix. These results are consistent with those observed in previous studies using PNS [29,30,43,56] or CNS [7,34]. The total porosity also decreased as the amount of CNS increased, with 28-day total porosity being smaller than 1-day.…”

Section: Pore Structuresupporting

confidence: 92%

“…This is because nano-silica particles reduce the porosity of the matrix through the nucleation effect, pozzolanic reaction, and filler effect in cement hydration reaction. This effect is further enhanced with increasing amounts of nano-silica particles [7,8,21,[29][30][31]43,44,56]. Figure 6 also shows that as the amount of CNS increases, the pore size and amount decrease due to the effects mentioned above.…”

Section: Pore Structurementioning

confidence: 85%

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Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method

et al. 2019

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This study applies a new method of mixing colloidal nano-silica (CNS). Previous studies have used powdered nano-silica or colloidal nano-silica and applied a binder weight substitution method. In this study, we tried to use ordinary Portland cement (OPC) as a binder and replace CNS with weight of mixing water. CNS was replaced by 10%, 20%, 30%, 40%, and 50% of the mixing water weight. The flow value, setting time, compressive strength, hydration reactant (X-ray diffractometer; XRD), pore structure (mercury intrusion porosimetry; MIP), thermal analysis, and scanning electron microscopy (SEM) analysis were performed. Experimental results show that the new substitution method improves the mechanical and microstructural properties through two effects. One is that the weight substitution of the mixing water shows a homogeneous dispersion effect of the nano-silica particles. The other is the effect of decreasing the w/b ratio when the CNS is substituted because the CNS is more dense than the mixing water. Therefore, we confirmed the applicability of mixing water weight replacement method as a new method of mixing CNS.

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Section: Pore Structuresupporting

confidence: 92%

Section: Pore Structurementioning

confidence: 85%

Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method

et al. 2019

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“…There has been an important amount of research supporting the benefits of the use of microand nano-additives, in terms of the different properties of the resulting cement-based mortars and concrete. In the literature, the synergistic effect which has been found for a number of combinations of additives is especially relevant; this synergistic effect can contribute to further refinement of the porous network [9,[21][22][23]. Combinations of micro-and nano-additives can also produce an increase in the hydrate gel content at early ages.…”

Section: Introductionmentioning

confidence: 99%

Service Life and Early Age Durability Enhancement due to Combined Metakaolin and Nanosilica in Mortars for Marine Applications

et al. 2020

Self Cite

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The addition of a range of micro- and nano-particles to high-performance concrete has been the focus of recent research. At present, studies are mainly aimed at designing customised mortars, providing them with specific properties for each application. Improving the durability of mortars is one of the main objectives in such research, as a result of increasing environmental concern. The research presented herein analyses the synergistic effect of nanosilica and metakaolin as additives on the service life of cement-based mortars subject to aggressive environments (i.e., chloride exposure) at early ages. The effects of the additives on the durability properties of submerged samples after two and three days of curing were analysed. Tests were conducted on several different properties: resistivity, porosity, mechanical properties, chloride diffusion, and service life. It is observed that metakaolin and nanosilica exhibit a synergistic effect as additives, which is related to porosity refinement and chloride ion binding capacity, which contributes to enhanced resistance against chloride penetration from very early ages.

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“…Así mismo la concentración de CO2 en la atmósfera conlleva a un deterioro acelerado de las estructuras de concreto reforzado (Talukdar, et al 2012). El uso de materiales alternativos en materiales de construcción hechos a base de cemento portland es un área de estudio que ha ganado importancia desde hace algunos años de allí que se busquen alternativas enfocadas a la disminución del uso de cementopor lo que desde finales del siglo 20 diversos esfuerzos e investigaciones se han encaminado a la utilización de materiales de desecho de otras industrias como la acera (escoria granulada de alto horno) (Özbay, et al 2016), electrónica(microsílica) (Massana, et al 2018), azucarera (ceniza de bazo de caña) (Bahurudeen, et al 2015;Arenas-Piedrahita, et al 2016) y de generación de energía eléctrica (ceniza volante) entre otros. Dentro de los cuales se pueden encontrar estudios con altos niveles de remplazo de ceniza volante (Siddique, 2004;Bouzoubaa & Lachemi, 2001;Hemalatha & Ramaswamy, 2017).…”

Section: Introductionunclassified

Evaluación De Mezcla Ternaria De Cemento Portland, Ceniza Volante E Hidróxido De Calcio: Resistencia Mecánica Y Durabilidad Frente Al Ataque Por Carbonatación

Meza-Tavares¹,

De-Los-Santos²,

Santiago-Hurtado³

et al. 2019

Memorias Conpat 2019

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El presente trabajo muestra el estudio de cinco mezclas de mortero elaboradas a base de cemento portland con una sustitución alta de Ceniza volante y cal hidratada. El conjunto de mezclas se compone de una referencia solo cemento y el resto se realizaron con una sustitución de 50% en peso de cemento portland por cuatro proporciones distintas de ceniza volante tipo F e Hidróxido de calcio. Dichas mezclas fueron elaboradas y evaluadas por medio de pruebas de compresión, deterioro acelerado por carbonatación, porosidad al agua y resistividad eléctrica. La resistencia a compresión se vio disminuida hasta en un 42%; sin embargo, el uso de la cal ayudó a disminuir la profundidad de carbonatación en mezclas con cal respecto a la mezcla donde se utilizó solo ceniza volante.

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Influence of nano- and micro-silica additions on the durability of a high-performance self-compacting concrete

Cited by 98 publications

References 34 publications

Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method

Characteristics of Ordinary Portland Cement Using the New Colloidal Nano-Silica Mixing Method

Service Life and Early Age Durability Enhancement due to Combined Metakaolin and Nanosilica in Mortars for Marine Applications

Evaluación De Mezcla Ternaria De Cemento Portland, Ceniza Volante E Hidróxido De Calcio: Resistencia Mecánica Y Durabilidad Frente Al Ataque Por Carbonatación

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