The effect of metakaolin on the corrosion behavior of cement mortars

Batis, G.; Pantazopoulou, P.; Tsivilis, S.; Badogiannis, Efstratios

doi:10.1016/j.cemconcomp.2004.02.041

Cited by 166 publications

(76 citation statements)

References 20 publications

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“…The above microstructural changes determined low permeability. Similar results have been reported by other authors (4,8,(17)(18)(19) working with MK.…”

Section: Durability Of Mortars Containing Metakaolinsupporting

confidence: 92%

See 1 more Smart Citation

Efecto de la temperatura de tratamiento de un caolín en la permeabilidad a cloruros en morteros

Torres¹,

Gutiérrez²,

Puertas³

2007

Mater. construcc.

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“…The above microstructural changes determined low permeability. Similar results have been reported by other authors (4,8,(17)(18)(19) working with MK.…”

Section: Durability Of Mortars Containing Metakaolinsupporting

confidence: 92%

“…Estos cambios microestructurales determinan la baja permeabilidad. En este sentido, otros estudios realizados con MK de diferente procedencia han reportado resultados similares (4,8,(17)(18)(19).…”

Section: Durability Of Mortars Containing Metakaolinunclassified

Efecto de la temperatura de tratamiento de un caolín en la permeabilidad a cloruros en morteros

Torres¹,

Gutiérrez²,

Puertas³

2007

Mater. construcc.

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“…The advantages of adding MK (Al 2 Si 2 O 7 ) to concrete include enhanced compressive and bending strength, lower permeability, higher chemical resistance, improved workability, lesser efflorescence and longer durability (24,89,90). Adding approximately 10-15% MK raises reinforcing steel corrosion resistance (91,92). The presence of MK reduces chloride ion diffusion substantially in blended cement concretes (88,90,(93)(94)(95), while contradictory results have been reported for its performance in environments containing CO 2 (96,97).…”

Section: Adición De Materiales Mineralesmentioning

confidence: 99%

“…La adición del MK (Al 2 Si 2 O 7 ) en el hormigón tiene ventajas, tales como incrementar la resistencia a compresión y flexión, reducir la permeabilidad, incrementar la resistencia a ataque químico, mejorar la trabajabilidad, reducir la generación de eflorescencias, incrementar la durabilidad, entre otros (24,89,90). La resistencia a la corrosión del acero de refuerzo aumenta con adiciones de MK del 10-15% aproximadamente (91,92). La presencia de MK reduce ampliamente la difusión de iones cloruro en hormigones adicionados (88,90,(93)(94)(95); por el contrario se reportan resultados controvertidos para el desempeño en presencia de CO 2 (96,97).…”

Section: Adición De Materiales Mineralesunclassified

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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“…In addition, it was also observed that the compressive strength of MK mostly for various w/b ratios, were increased with increase in chloride exposure as compared to control concrete (0%) which was found reverse in case of PSC concrete. With increased chloride concentration, compressive strengths were decreased as shown in figure 3 (a, b, c) and figure 3 (d, e, f) depicted that compressive strength increase with age but decrease with chloride exposure for both the concrete as expected [10]. This may be because presence of higher percentage of alumina reacted with chlorides, forms friedel's salts and refines micro pores structure improves the strength [11].…”

Section: Effect Of Nacl Exposure On Compressive Strengthmentioning

confidence: 55%

Effect of Metakaolin and Slag blended Cement on Corrosion Behaviour of Concrete

Borade

Kondraivendhan

2017

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. The present paper is aimed to investigate the influence of Metakaolin (MK) and Portland slag Cement (PSC) on corrosion behaviour of concrete. For this purpose, Ordinary Portland Cement (OPC) was replaced by 15% MK by weight and readymade available PSC were used. The standard concrete specimens were prepared for both compressive strength and half-cell potential measurement. For the aforesaid experiments, the specimens were cast with varying water to binder ratios (w/b) such as 0.45, 0.5 and 0.55 and exposed to 0%, 3%, 5% and 7.5% of sodium chloride (NaCl) solution. The specimens were tested at wide range of curing ages namely 7, 28, 56, 90 and 180 days. The effects of MK, w/b ratio, age, and NaCl exposure upon concrete were demonstrated in this investigation along with the comparison of results of both MK and PSC concrete were done. It was also observed that concrete with MK shows improved performance as compared to concrete with PSC.

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The effect of metakaolin on the corrosion behavior of cement mortars

Cited by 166 publications

References 20 publications

Efecto de la temperatura de tratamiento de un caolín en la permeabilidad a cloruros en morteros

Efecto de la temperatura de tratamiento de un caolín en la permeabilidad a cloruros en morteros

Durabilidad del hormigón armado expuesto a condiciones agresivas

Effect of Metakaolin and Slag blended Cement on Corrosion Behaviour of Concrete

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