Effect of curing environments on strength, porosity and chloride ingress resistance of blast furnace slag cement concretes: A construction site study

Chen, How Ji; Huang, Shao Siang; Tang, Chao; Malek, Marlinda Abdul; Ean, Lee Woen

doi:10.1016/j.conbuildmat.2012.06.052

Cited by 67 publications

(35 citation statements)

References 12 publications

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“…Al respecto, Topçu y Boga (69) reportan en especímenes con 25% de reemplazo de cemento por GBFS a 90 días de curado, además de altas resistencias a la compresión, una alta resistencia a la corrosión del acero. En general, los autores coinciden en que esta adición reduce la porosidad del hormigón y se da un refinamiento de poros, ofreciendo una resistencia importante a la entrada del ion cloruro (70). Con altos niveles de reemplazo (45-65%) de escoria y una relación a/c de 0,40 se ha confirmado la resistencia a la penetración del ion cloruro para bloques expuestos a zonas de mareas por 25 años (71).…”

Section: Adición De Materiales Mineralesunclassified

“…Con altos niveles de reemplazo (45-65%) de escoria y una relación a/c de 0,40 se ha confirmado la resistencia a la penetración del ion cloruro para bloques expuestos a zonas de mareas por 25 años (71). Este efecto, en la penetración de los cloruros se atribuye a la capacidad de enlazar cloruros (formación de Sal de Friedel) reduciendo así su coeficiente de difusión (70,72,73). Adicionalmente, se ha comprobado que la adición de GBFS, aunque disminuye el pH de la solución de poros, no tiene efectos adversos para la corrosión del acero (68,74).…”

Section: Adición De Materiales Mineralesunclassified

“…Concrete exposed to seawater spray for 25 years, containing high slag replacement rates (45-65%) and a w/c ratio of 0.40, was found to successfully resist chloride ion penetration (71). This effect on chloride penetration is attributed to the capacity to bind chlorides (Friedel's salt formation), thereby reducing the ion diffusion coefficient (70,72,73). Furthermore, the addition of GBFS, while lowering the pH in the pore solution, had no adverse effect on steel corrosion (68,74).…”

Section: Adición De Materiales Mineralesmentioning

confidence: 99%

“…Topçu and Boğa (69) reported both high compressive strength and high steel corrosion resistance in 90-day specimens containing 25% GBFS. The general consensus is that the reduction in concrete porosity and pore refinement afforded by this addition substantially enhances the resistance to chloride ion ingress (70). Concrete exposed to seawater spray for 25 years, containing high slag replacement rates (45-65%) and a w/c ratio of 0.40, was found to successfully resist chloride ion penetration (71).…”

Section: Adición De Materiales Mineralesmentioning

confidence: 99%

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Durabilidad del hormigón armado expuesto a condiciones agresivas

Aguirre¹,

Gutiérrez²

2013

Mater. construcc.

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Reinforced concrete is the most widely used construction material in the world. The combination of high compressive strength, afforded by concrete and, and the excellent mechanical properties that characterise steel make it an ideal composite for all manner of structures. One of the main weaknesses of this material, however, is that when the concrete is exposed to aggressive environments, in particular high concentrations of chloride ions or carbon dioxide, reinforcing steel corrodes, shortening service life. This article reviews the state of the art on concrete durability, along with the conditions that affect its useful life by inducing reinforcing steel corrosion. It also discusses the prevention and control methods, in particular electrochemical prevention and rehabilitation techniques, that have been developed to mitigate the problem.Keywords: reinforced concrete; steel corrosion; mineral additions; electrochemical rehabilitation. RESUMENEl hormigón armado se ha convertido en el material más utilizado a nivel mundial en el sector de la construcción. La combinación de las altas prestaciones a resistencia a la compresión que ofrece el hormigón y las excelentes propiedades mecánicas del acero lo hacen el material compuesto ideal para aplicaciones estructurales. Sin embargo, uno de los mayores problemas que afecta la vida útil del hormigón es la corrosión del acero de refuerzo, la cual se presenta cuando el hormigón se encuentra expuesto a ambientes agresivos, en especial frente a la exposición a iones cloruros y/o dióxido de carbono. Este trabajo revisa el estado del conocimiento con respecto a la durabilidad del hormigón enfatizando en los fenóme-nos que afectan su durabilidad y generan la corrosión del acero de refuerzo, adicionalmente se incluyen los métodos de prevención y control que se han desarrollado para mitigar el problema, en particular los relacionados con las técnicas electroquímicas de prevención y rehabilitación. INTRODUCTIONVersatility and low cost have made concrete one of the world's most popular construction materials (1, 2). This ceramic material is characterised by high compressive strength, although it is prone to cracking under other types of mechanical stress such as bending and tensile forces, torque and shear. That weakness led to the advent of reinforced concrete, a combination of concrete and structural steel widely used to build bridges, buildings in general and skyscrapers in particular, tunnels and a host of other structures. One of the most important features of concrete, in addition to its mechanical properties, is its durability, which is associated with the inservice life of structures exposed to certain conditions or environments (3, 4). More specifically, reinforcing steel corrosion has been identified as the main weakness of reinforced concrete (5). This paper discusses the main types of concrete deterioration, including the processes that contribute to steel corrosion, and the respective prevention and control methods, such as the use of inhibitors and coatings, ...

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Section: Adición De Materiales Mineralesunclassified

Section: Adición De Materiales Mineralesmentioning

confidence: 99%

Section: Adición De Materiales Mineralesmentioning

confidence: 99%

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Durabilidad del hormigón armado expuesto a condiciones agresivas

Aguirre¹,

Gutiérrez²

2013

Mater. construcc.

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“…Blast furnace slag (BFS) has been widely used as a mineral admixture in cement and concrete in the concrete industry in order to reduce CO 2 emissions (Miyazawa et al 2010;Chen et al 2012;Kumar et al 2008). In Japan, the replacement levels of BFS are categorized into type A (5-30 wt.%), type B (30-60 wt.%), and type C (60-70 wt.%) according to the Japanese Industrial Standard (JIS).…”

Section: Introductionmentioning

confidence: 99%

Effect of Limestone Powder and Gypsum on the Compressive Strength Mixture Design of Blast Furnace Slag Blended Cement Mortar

Kim

Zhang

et al. 2017

ACT

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Journal of Advanced AbstractThis paper investigates the compressive strength development of blast furnace slag (BFS) blended mortar mixtures incorporating various mineral admixtures, namely BFS, limestone powder (LSP), and gypsum (CS). BFS replacement ratios of 15, 20, and 25 wt.%; LSP replacement ratios of 2, 3, 4, and 5 wt.%; and a CS replacement ratio of 2 wt.% are employed to improve the strength of BFS blended mortar mixtures. The hydration reaction and products resulting from the use of cement, BFS, and mineral admixtures are quantitatively examined with respect to the XRD/Rietveld method in order to investigate the relationship between the produced hydrates and the strength. Experimental investigation reveals that the mortar mixture with BFS 15 wt.%, LSP 4 wt.%, and CS 2 wt.% exhibits similar compressive strength to an ordinary Portland cement mortar mixture. In addition, the strength is found to be decreased as the BFS replacement ratio increases. At a BFS replacement ratio above 20 wt.%, LSP affects the strength improvement of BFS cement and CS affects the initial strength improvement of BFS cement.

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Effect of coral powder and ground-granulated blast‑furnace slag on the hydration behavior of cement paste

Nie

et al. 2021

J Therm Anal Calorim

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Effect of curing environments on strength, porosity and chloride ingress resistance of blast furnace slag cement concretes: A construction site study

Cited by 67 publications

References 12 publications

Durabilidad del hormigón armado expuesto a condiciones agresivas

Durabilidad del hormigón armado expuesto a condiciones agresivas

Effect of Limestone Powder and Gypsum on the Compressive Strength Mixture Design of Blast Furnace Slag Blended Cement Mortar

Effect of coral powder and ground-granulated blast‑furnace slag on the hydration behavior of cement paste

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