Using mathematical modeling for design of self compacting high strength concrete with metakaolin admixture

Дворкін, Леонід; Bezusyak, A.; Lushnikova, Nataliya; Ribakov, Yuri

doi:10.1016/j.conbuildmat.2012.04.019

Cited by 38 publications

(16 citation statements)

References 13 publications

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“…The higher slump values of MKbearing samples when compared with NS-bearing dispersions could be explained taking into account the differences in the particle average size (because the larger particle size of the MK led to a lower water demand) and a certain lubricant effect, that allowed the particles to reduce their friction forces, thus increasing the fluidity [35]. In this line, the low water demand of samples with MK has been previously reported [36]. Also in these MK-lime pastes PCE1 copolymer showed the best plasticizing effect as compared with PCE2.…”

Section: Dispersion Effectivenesssupporting

confidence: 61%

Assessment of the interaction of polycarboxylate superplasticizers in hydrated lime pastes modified with nanosilica or metakaolin as pozzolanic reactives

Navarro-Blasco

Perez-Nicolas

Fernández

et al. 2014

Construction and Building Materials

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Two polycarboxylate ether copolymers were assessed as superplasticizers (SPs) for hydrated lime pastes modified with two reactive compounds, nanosilica (NS) and ceramic metakaolin (MK). Characterization of the molecular structure of the SPs by Size Exclusion Chromatography, XRD, FTIR and MALDI-TOF (Matrix Assisted LaserDesorption Ionization Time-of-Flight) mass spectrometry was performed. The structures of the polymers were seen to be star-and worm-like shapes. A close relationship was found between the molecular architecture and the flowability of the pastes, being the star-shaped plasticizer the most efficient. Zeta potential assessment allowed us to elucidate a steric hindrance as the main action mechanism for these polymers. The large specific surface area of nanosilica led to a large SPs consumption as compared with metakaolin with lower surface area. However, SPs in MK-lime samples were attached favourably on the C-S-H and aluminate hydrates, so that the dispersing action was greater with respect to NS-lime suspensions.2

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Section: Dispersion Effectivenesssupporting

confidence: 61%

Assessment of the interaction of polycarboxylate superplasticizers in hydrated lime pastes modified with nanosilica or metakaolin as pozzolanic reactives

Navarro-Blasco

Perez-Nicolas

Fernández

et al. 2014

Construction and Building Materials

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“…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). However, limited test data are available regarding the performance of the commercially available MK and Indian cements in the case of high strength concrete in the country (Basu 2003;Basu et al 2000, Pal et al 2001, Patil and Kumbhar 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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“…Dvorkin et al used mathematical modelling for design of self-compacting high strength concrete with metakaolin admixture [20]. It was reported that optimal concrete composition can be proportioned by applying experimental and traditional formulas.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

Iqbal¹,

Ali²,

Holschemacher³

et al. 2016

Period. Polytech. Civil Eng.

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IntroductionAs known, self-compacting concrete (SCC) is highly flowable, non-segregating concrete that can spread into place, fill the formwork, and encapsulate the reinforcement without any mechanical consolidation. It doesn't require any vibration for compaction and can flow through narrow spaces without segregation and excessive bleeding [1]. Therefore SCC is one of the greatest innovations of concrete technology. It was introduced in construction industry in early 1990s. Similar to the normal vibrated concrete (NVC), SCC mixtures consist of aggregate, cement, water, admixtures and some mineral additions. Unlike NVC, SCC has high quantity of fillers (eg. silica fume, fly ash, limestone powder etc.) and superplasticizer (high-range water reducing admixture) added to improve its flowing property.As SCC flows under its own weight without or very little use of vibration, it results in saving a lot of labor effort and bring economy to the concreting. Moreover, it can also flow through narrow and complex geometries where the use of vibrator is almost impossible.Use of SCC in construction industry is getting more and more popularity all over the world because of inherited advantages and studies on its hardened properties. SCC can be classified mainly into 3 different types [2]:• powder type;• viscosity type and • combination type The first type has a high amount of powder (all material <0.15 mm) ranging from 550-650 kg/m 3 , which provides the plastic viscosity and thus resistance to segregation whereas the yield point is determined by the addition of suitable superplasticizers. In the second type there is less powder content ranging from 350-450 kg/m 3 . In this type additional minerals or fillers are not used for segregation resistance. An admixture called viscosity modifying agent (VMA) is used to control the segregation, while yield point is controlled by the superplasticizer. The third type has a powder content of 450-550 kg/m 3 , but additionally rheology is controlled by the use of appropriate dosage of VMA and superplasticizer.

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Using mathematical modeling for design of self compacting high strength concrete with metakaolin admixture

Cited by 38 publications

References 13 publications

Assessment of the interaction of polycarboxylate superplasticizers in hydrated lime pastes modified with nanosilica or metakaolin as pozzolanic reactives

Assessment of the interaction of polycarboxylate superplasticizers in hydrated lime pastes modified with nanosilica or metakaolin as pozzolanic reactives

Effect of Metakaolin Content on the Properties of High Strength Concrete

Effect of Fly Ash on Properties of Self-Compacting High Strength Lightweight Concrete

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