Relative strength, pozzolanic activity and cement hydration in superplasticised metakaolin concrete

Wild, S.; Khatib, Jamal; Jones, Anthony

doi:10.1016/0008-8846(96)00148-2

Cited by 538 publications

(217 citation statements)

References 7 publications

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“…To obtain a simple and reliable model and a guideline for predicting consistency parameters practically, the following empirical rule (Wild et al 1996) may be applied: 2…”

Section: Guidelines For Predicting Consistency Parametersmentioning

confidence: 99%

“…Increasing use of by-products, such as FA (British Standards Institution 1993 and1985;Concrete Society 1991;Guemandi et al 2008), to partially replace Portland cement in concrete not only reduces the amount of cement used, hence reducing the emission of CO 2 and conserving existing resources (Davies, Kitchener 1996;Kon, Poon 2008), but significantly enhances the properties of concrete (Dhir et al 1988;Dhir et al 1993;Curcio et al 1998;Chia, Zhang 2004;Gribniak et al 2008). Inclusion of FA in concrete greatly improves consistency (Wild et al 1996). Research work done on metakaolin (Curcio et al 1998) has shown that the partial replacement of PC with MK in concrete significantly affects consistency and early strength (Banfil, Frias 2007;Kostuch et al 2006).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Consistency of Fly Ash and Metakaolin Concrete

Bai

Gailius

2009

Journal of Civil Engineering and Management

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Abstract. As high-performance Portland cement (PC), fly ash (FA) and metakaolin (MK) concrete have been developed in wide applications, it has growing interest in optimizing and predicting consistency of fresh PC-FA-MK concrete for efficient and practical design and construction. This paper presents statistical models for predicting the consistency of concrete incorporating PC, FA and MK from the experimental results of standard consistency tests. They reflect the effect of variations of pozzolanic replacement materials including FA and MK at graduated replacement levels of up to 40% and 15%, respectively. The predictions produced are compared with the experimental results of consistency of concrete blends. Models show that they can be used to predict the consistency parameters including slump, compacting factor and Vebe time with a good degree of accuracy in a wide range of FA-MK blends. Design guidelines for evaluating consistency parameters are tentatively recommended along with their confidence intervals for prediction limits at 5% significance levels.

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“…To obtain a simple and reliable model and a guideline for predicting consistency parameters practically, the following empirical rule (Wild et al 1996) may be applied: 2…”

Section: Guidelines For Predicting Consistency Parametersmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Consistency of Fly Ash and Metakaolin Concrete

Bai

Gailius

2009

Journal of Civil Engineering and Management

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“…Therefore the use of metakaoiln proves economical over that of silica fume. Previously, researchers have shown a lot of interest in MK as it has been found to possess both pozzolanic and microfiller characteristics (Poon et al 2001;Wild and Khatib 1997;Wild et al 1996). It has also been used successfully for the development of high strength self compacting concrete using mathematical modeling (Dvorkin et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Effect of Metakaolin Content on the Properties of High Strength Concrete

Dinakar

Sahoo

Sriram

2013

Int J Concr Struct Mater

233

104

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This study presents the effect of incorporating metakaolin (MK) on the mechanical and durability properties of high strength concrete for a constant water/binder ratio of 0.3. MK mixtures with cement replacement of 5, 10 and 15 % were designed for target strength and slump of 90 MPa and 100 ± 25 mm. From the results, it was observed that 10 % replacement level was the optimum level in terms of compressive strength. Beyond 10 % replacement levels, the strength was decreased but remained higher than the control mixture. Compressive strength of 106 MPa was achieved at 10 % replacement. Splitting tensile strength and elastic modulus values have also followed the same trend. In durability tests MK concretes have exhibited high resistance compared to control and the resistance increases as the MK percentage increases. This investigation has shown that the local MK has the potential to produce high strength and high performance concretes.

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“…The physical influence is in the refinement of pore structure of the cement paste, while the chemical phase consists of the pozzolanic reaction, which replaces C-H crystals with cementitious C-S-H gel. However, partial replacement of cement in concrete by pozzolans can produce an immediate dilution effect, which will cause early concrete strength to reduce in approximate proportion to the degree of replacement [5]. In this paper, an investigation is carried out to relate the strength of concrete mixtures made with pozzolans to the strength of the OPC control mixture.…”

Section: Introductionmentioning

confidence: 99%