| People | Locations | Statistics |
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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Sonebi, Mohammed
Queen's University Belfast
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (62/62 displayed)
- 2024Evaluation of basalt fibers and nanoclays to enhance extrudability and buildability of 3D-printing mortarscitations
- 2023Conclusions
- 2023Effect of nanoclay on the printability of extrusion-based 3D printable mortarcitations
- 2023Effect of graphene as additive on the mechanical properties of concretecitations
- 2023RILEM TC 266-MRP: round-robin rheological tests on high performance mortar and concrete with adapted rheology—rheometers, mixtures and procedurescitations
- 2023Viscoelastic properties of fresh cement paste: measuring procedures and influencing parameterscitations
- 2023RILEM TC 266-MRP - Round-Robin Rheological Tests on High Performance Mortar and Concrete with Adapted Rheology: Evaluating Structural Build-up at Rest of Mortar and Concrete
- 2023Optimisation of mix proportion of 3D printable mortar based on rheological properties and material strength using factorial design of experimentcitations
- 2023RILEM TC 266-MRP: Round-Robin rheological tests on high performance mortar and concrete with adapted rheology—evaluating structural build-up at rest of mortar and concretecitations
- 2023Correlation between length change and mechanical properties of mortar containing phragmites australis ash (PAA)citations
- 2023Rheology characterization of 3D printing mortars with nanoclays and basalt fiberscitations
- 2023Characterisation of hemp shiv and its effect on the compressive strength of hemp concretecitations
- 2023Review of advances in 3D printing technology of cementitious materials: key printing parameters and properties characterizationcitations
- 2023Review of advances in 3D printing technology of cementitious materials: key printing parameters and properties characterizationcitations
- 2022Properties and testing of printed cement-based materials in hardened statecitations
- 2022Properties and testing of printed cement-based materials in hardened statecitations
- 2022Effect of Viscosity Modifying Agent on the Performance of Hybrid Bio-Based Concrete
- 2022Effect of the Treatments of the Surface on Mechanical Performance of Concrete Containing Chemical Admixtures
- 2022Factorial design modelling of cement grout containing dolomitic quarry dust powdercitations
- 2022Mechanical performance of 3-D printed concrete containing fly ash, metakaolin and nanoclaycitations
- 2022Assessment of the influence of the type of filler materials on the properties of cement groutscitations
- 2022Printable Cement-Based Materials: Fresh Properties Measurements and Controlcitations
- 2022Investigation of fresh properties of 3D concrete printing containing nanoclay in forms of suspension and powder
- 2022Influence of nanoclay on the fresh and rheological behaviour of 3D printing mortarcitations
- 2022Effect of nanoclay on extrudability, printability and mechanical performance of extrusion-based 3D printing mortar
- 2021Slump Test: A New Empirical Model for High Yield Stress Materialscitations
- 2021A Review on Cementitious Materials Including Municipal Solid Waste Incineration Bottom Ash (MSWI-BA) as Aggregatescitations
- 2021Shear-thickening behavior of sustainable cement paste — Controlling physical parameters of new sources of supplementary cementitious materialscitations
- 2021Effect of Red Mud, Nanoclay, and Natural Fiber on Fresh and Rheological Properties of Three-Dimensional Concrete Printing
- 2021Gypsum-plasters mixed with polystyrene balls for building insulation: Experimental characterization and energy performancecitations
- 2020Experimental Investigation of Strain Sensitivity for Surface Bonded Fibre Optic Sensorscitations
- 2020The rheological properties of modified self-compacting cementitious paste
- 2020Rheological properties of 3D printing concrete containing sisal fibres
- 2020Structural Assessment of Reinforced Concrete Beams Incorporating Waste Plastic Strawscitations
- 2020Improving concrete and mortar using modified ash and slag cementscitations
- 2019Recycling ceramic waste powder: effects its grain-size distribution on fresh and hardened properties of cement pastes/mortars formulated from SCC mixescitations
- 2019Low clinker slag Portland cement of increased activity Academic Journal of Civil Engineering
- 2019Mechanical properties of 3D bio-printing cement-based materials
- 2019Influence of nano-clay on rheology, fresh properties of hydration and strength of cement-based mortarscitations
- 2018Application areas of phosphogypsum in production of mineral binders and composites based on them: a review of research resultscitations
- 2018Numerical analysis of a reinforced concrete beam under blast loadingcitations
- 2018Hydration characteristics and structure formation of cement pastes containing metakaolincitations
- 2017Design and multi-physical properties of a new hybrid hemp-flax composite materialcitations
- 2017The influence of arching action on BFRP reinforced SCC deck slabs in Thompson bridge
- 2016Variability of the mechanical properties of hemp concretecitations
- 2016Pervious Concrete: Mix Design, Properties and Applicationscitations
- 2016Effect of waste ceramic powder on strength development characteristics of cement based mortars
- 2015Nový přístup k určení optimální dávky superplatifikátorůa jejich kompatibility s cementovými materiály
- 2014Compability of Superplasticizers with Cementitious Materials
- 2012Characterisation of the performance of sustainable grout containing bentonite for geotechnical applications
- 2012Influence of the type of coarse lightweight aggregate on properties of Semi-Lightweight Self-Consolidating Concretecitations
- 2012Influence of polyvinyl alcohol, steel and hybrid fibers on fresh and rheological properties of self-consolidating concretecitations
- 2011Neural Network Modeling of Rheological Parameters of Grouts Containing Viscosity-Modifying Agent
- 2009Prediction of Fresh and Hardened Properties of Self-Consolidating Concrete Using Neurofuzzy Approachcitations
- 2009Genetic programming based formulation for fresh and hardened properties of self-compacting concrete containing pulverised fuel ashcitations
- 2008Utilization of micro-indentation technique to determine the micromechanical properties of ITZ in cementitious materials
- 2004Bond and Interfacial Properties of Reinforcement in Self-Compacting Concrete
- 2003Assessment of Self-Compacting Concrete Immersed in Acidic Solutions
- 2002Experimental design to optimize high-volume of fly ash grout in the presence of welan gum and superplasticizercitations
- 2002Experimental Design to Optimize High-Volume Ash Grout in the Presence of Welan Gum and Superplasticizer
- 2001Effect of Mixture Composition on Relative Strength of Highly Flowable Underwater Concrete
- 2001Testing abrasion resistance of high-strength concrete
Places of action
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article
Hydration characteristics and structure formation of cement pastes containing metakaolin
Abstract
<jats:p>Metakaolin (MK) is one of the most effective mineral admixtures for cement-based composites. The deposits of kaolin clays are wide-spread in the world. Metakaolin is comparable to silica fume as an active mineral admixture for cement-based composites. In this paper, the rheological and mechanical properties of cement paste containing metakaolin are investigated. The effect of MK is more evident at “tight” hydration conditions within mixtures with low water-cement ratio, provided by application of superplasticizers. The cement is replaced with 0 to 15% metakaolin, and superplasticizer content ranged from 0 to 1.5% by weight of cementitious materials (i.e. cement and metakaolin). An equation is derived to describe the relationship between the metakaolin and superplasticizer content and consistency of pastes. There is a linear dependence between metakalolin content and water demand. Second-degree polynomial describe the influence of superplasticizer content. The application of SP and MK may produce cement-water suspensions with water-retaining capacity at 50-70% higher than control suspensions. The investigation of initial structure forming of cement pastes with SP-MK composite admixture indicates the extension of coagulation structure forming phase comparing to the pastes without additives. Crystallization stage was characterized by more intensive strengthening of the paste with SP-MK admixture comparing to the paste without admixtures and paste with SP. Results on the porosity parameters for hardened cement paste indicate a decrease in the average diameter of pores and refinement of pore structure in the presence of metakaolin. A finer pore structure associated with an increase in strength. X-ray analysis data reveal a growing number of small-crystalline low-alkaline calcium hydrosilicates and reducing portlandite content, when MK dosage increases. Scanning electron microscopy (SEM) data confirm, that hardened cement paste containing MK has crystalline structure with dominance of partially crystalized hydrosilicates and gel-like formations.</jats:p>