Effect of metakaolin on creep and shrinkage of concrete

Brooks, J. J.; Johari, Megat Azmi Megat

doi:10.1016/s0958-9465(00)00095-0

Cited by 267 publications

(107 citation statements)

References 5 publications

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“…The filling effect and pozzolanic reaction leads to increase in compressive strength, while decreasing in cement dosage has a negative effect [21][22][23][24]. The optimum dosage of metakaolin was recommended to be 10-20% by some researchers [21][22][23][24][25][26][27].…”

Section: Resultsmentioning

confidence: 99%

The effect of metakaolin and end type of steel fiber on fiber-SIFCON matrix bond characteristics

Yalçınkaya

Beglarigale²,

Yazıcı³

2014

uujms

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SIFCON (Slurry Infiltrated Fiber Concrete) can be described as a special type of cement based composite produced with fiber volume fraction values between 5 to 30%. As a result of superior mechanical properties such as compressive, tensile, shear and flexural strengths with extraordinary toughness values, SIFCON can be used in in industrial floors, repair and reinforcement works and military applications such as anti-missile hangers. Mechanical properties of fiber reinforced cement based composites are dramatically influenced by steel fiber-matrix bond characteristics. Many parameters such as fiber type and geometry, matrix strength, curing conditions and properties of fiber-matrix interface affect the fibermatrix bond characteristics. The density of this zone can be increased with supplementary cementitious materials such as metakaolin. In this study the effect of metakaolin and end type of steel fiber on bond characteristics has been investigated. The fiber-matrix bond characteristics were determined by applying single-fiber pull-out test. Utilization of metakaolin has improved the compressive strength and fibermatrix bond characteristics. In addition, hooked-end fiber has a better performance compared to the smooth fiber.

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Section: Resultsmentioning

confidence: 99%

The effect of metakaolin and end type of steel fiber on fiber-SIFCON matrix bond characteristics

Yalçınkaya

Beglarigale²,

Yazıcı³

2014

uujms

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“…Some researchers have reported a systematic decrease in drying shrinkage with increasing replacement levels of metakaolin [13,19], while others have reported no observable benefit from higher replacements [37].…”

Section: Thermal Expansion and Shrinkagementioning

confidence: 99%

Sustainable Materials for Transportation Infrastructures: Comparison of Three Commercially-Available Metakaolin Products in Binary Cementitious Systems

et al. 2018

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Abstract:Metakaolin is the only major natural pozzolan to be specified for use as a supplementary cementitious material in the United States. As a result, the metakaolin market for concrete has grown dramatically in the past 20 years. As of now, the specifications of up to 16 state departments of transportation allow for the use of commercially-available and high-reactivity metakaolin products. However, to the best of the authors' knowledge, no study has been performed to evaluate whether these products are comparable in their performance. Three commercially-available (U.S.) metakaolin products, each replacing 10%, 15%, and 20% of the cement content in concrete and mortar mixtures are studied. Concrete mixtures contained a cementitious content of 422 kg/m 3 , a coarse aggregate fraction of 985 kg/m 3 , and a water-to-cementitious ratio equal to 0.43. Varying levels of a superplasticizer were used to maintain a uniform workability between mixtures. Each mixture was subjected to the following tests: compression, split-cylinder tension, modulus of rupture, dynamic elastic modulus, rapid chloride-ion penetrability, alkali-silica reactivity, sulfate resistance, the coefficient of thermal expansion, and drying shrinkage. Benefits from the inclusion of metakaolin were highly product-dependent and include increases in mechanical strength. All metakaolin supplemented concrete mixtures benefitted from decreased permeability and increased resistance to chemical attacks, with the exception of the sulfate resistance of mortars including a metakaolin product with high fineness. The inclusion of any metakaolin at any replacement level increased the coefficient of thermal expansion of concrete specimens. Reasons for difference in performance between products are discussed, and predictors of quality are recommended.

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“…At all measuring dates, the reference mortars recorded values of shrinkage at least twice higher than the most shrinking specimens containing MKs (10% MKs). Brooks and Megan [29] in their studies have noted identical behavior with the total shrinkage reduced as the MK incorporation rate increased for a 200 days period. They have noticed that the drying shrinkage was more influenced with a reduction of over 50% with reference to the PC mortars.…”

Section: Total Shrinkagementioning

confidence: 73%

The Influence of Metakaolin from Saaba (Burkina Faso) over Physico-Mechanical and Durability Properties of Mortars

Ntimugura¹,

Sore²,

Bello³

et al. 2017

OJCE

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The paper evaluates the feasibility of reducing clinker in the Portland Cement production using local metakaolin in Burkina Faso. Standardized testing methods have been used for this purpose, and experiments were performed on mortar prisms containing different amounts of metakaolin. Important results about the physical, mechanical and durability characterization of blended mortars were carried out in this study. The obtained results are discussed based on available literature data. These results have shown increased physical and durability properties for blended mortars. Although the mechanical strengths remained relatively low for higher MK incorporations, the latter grow to surpass these of PC mortars (the reference) at 28, 56 and 90 days of curing. The results in the paper, have confirmed the possibility of using metakaolin to partially substitute cement, a possibility to reduce the CO2 production by the cement industry in Burkina Faso.

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Effect of metakaolin on creep and shrinkage of concrete

Cited by 267 publications

References 5 publications

The effect of metakaolin and end type of steel fiber on fiber-SIFCON matrix bond characteristics

The effect of metakaolin and end type of steel fiber on fiber-SIFCON matrix bond characteristics

Sustainable Materials for Transportation Infrastructures: Comparison of Three Commercially-Available Metakaolin Products in Binary Cementitious Systems

The Influence of Metakaolin from Saaba (Burkina Faso) over Physico-Mechanical and Durability Properties of Mortars

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