Evolution of mechanical properties of concrete containing ground granulated blast furnace slag and effects on the scaling resistance test at 28days

Chidiac, S.E.; Panesar, Daman K.

doi:10.1016/j.cemconcomp.2007.09.003

Cited by 150 publications

(71 citation statements)

References 11 publications

(24 reference statements)

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“…For instance, compared to the control specimens without Ns (C-S and CG-BP) and irrespective of the type of fibers included, the reduction in surface scaling of the NFRM was up to 60% and 81% for mixtures without and with slag, respectively. Cementitious systems containing high volumes of SCMs such as slag are vulnerable to surface scaling due to the slow reactivity of hydration and binding of SCMs [14,52] (e.g., the control specimens CG-BP had a mass loss of 1576 g/m 2 ). However, the significantly limited surface scaling of the NFRM containing slag can be attributed to the incorporation of nano-silica in these mixtures, which enhanced the reactivity and binding of slag, as indicated for example by the evolution of compressive strength and reduction of penetrability of these mixtures.…”

Section: Surface Scalingmentioning

confidence: 99%

Properties of Fiber-Reinforced Mortars Incorporating Nano-Silica

Ghazy

Bassuoni

Maguire³

et al. 2016

Fibers

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Repair and rehabilitation of deteriorating concrete elements are of significant concern in many infrastructural facilities and remain a challenging task. Concerted research efforts are needed to develop repair materials that are sustainable, durable, and cost-effective. Research data show that fiber-reinforced mortars/concretes have superior performance in terms of volume stability and toughness. In addition, it has been recently reported that nano-silica particles can generally improve the mechanical and durability properties of cement-based systems. Thus, there has been a growing interest in the use of nano-modified fiber-reinforced cementitious composites/mortars (NFRM) in repair and rehabilitation applications of concrete structures. The current study investigates various mechanical and durability properties of nano-modified mortar containing different types of fibers (steel, basalt, and hybrid (basalt and polypropylene)), in terms of compressive and flexural strengths, toughness, drying shrinkage, penetrability, and resistance to salt-frost scaling. The results highlight the overall effectiveness of the NFRM owing to the synergistic effects of nano-silica and fibers.

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Section: Surface Scalingmentioning

confidence: 99%

Properties of Fiber-Reinforced Mortars Incorporating Nano-Silica

Ghazy

Bassuoni

Maguire³

et al. 2016

Fibers

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“…However, some mineral admixtures can improve the workability of concrete or reduce the early hydration heat of binder [4][5][6]. The concrete with appropriate mineral admixture can get late-age properties close to or even better than the pure cement concrete [7][8][9][10].…”

Section: Introductionmentioning

confidence: 96%

The difference among the effects of high-temperature curing on the early hydration properties of different cementitious systems

Wang

Jiang

2014

J Therm Anal Calorim

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The difference among the effects of high-temperature curing on the early hydration properties of the pure cement, the binder containing fly ash, the binder containing GGBS, and the binder containing steel slag was investigated by determining the compressive strength, nonevaporable water content, hydration heat, and Ca(OH) 2 content. Results show that the order of the influence degrees of high-temperature on the early hydration of different binders is the binder containing GGBS [ the binder containing steel slag [ the binder containing fly ash [ the pure cement. In the case of short period of high-temperature curing (only 1 day), the strength growth rate of the concrete containing GGBS is the greatest. Though the influence of increasing high-temperature curing period on the hydration degree of the binder containing fly ash is not the most significant, the strength growth rate of the concrete containing fly ash is the most significant due to the excessive consumption of Ca(OH) 2 by reaction of fly ash. In the case of high-temperature curing, the Ca(OH) 2 content of the paste containing steel slag is much higher than those of the paste containing GGBS and the paste containing fly ash, so though high-temperature curing promotes the hydration of the binder containing steel slag significantly, its influence on the strength growth rate of the concrete containing steel slag is not so significant.

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“…En este sentido, investigaciones efectuadas por Chidiac y Panesar [1] han determinado que la cantidad de agua no evaporable de pastas con contenidos variables de escoria y relaciones a/mc de 0,31 y 0,40, decrece sustancialmente con el incremento del contenido de escoria y la disminución de la relación a/mc. Este comportamiento puede ser atribuido a que con la disminución de la relación a/mc existe menos espacio disponible en la pasta para la disolución y precipitación de los productos de hidratación.…”

Section: Introductionunclassified