| 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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Rovnanikova, Pavla
Brno University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (18/18 displayed)
- 2021Influence of rock inclusion composition on the fracture response of cement-based composite specimenscitations
- 2020Characterization of Ceramic-Based Alkali Activated Aluminosilicate Compositescitations
- 2019Influence of biopolymeric water-retaining admixtures on hydration of Portland cement studied using isothermal calorimetrycitations
- 2019Rheology of natural hydraulic lime pastes modified by non-traditional biopolymeric admixturescitations
- 2018High-strength concrete based on ternary binder with high pozzolan contentcitations
- 2018Red-clay ceramic powders as geopolymer precursors: Consideration of amorphous portion and CaO contentcitations
- 2018Thermal and Hygric Properties of Alkali Activated Aluminosilicates
- 2018Rheological properties and microstructure of binary waste red brick powder /metakaolin geopolymercitations
- 2018Application of waste brick powder in alkali activated aluminosilicates: Functional and environmental aspectscitations
- 2018MATERIAL CHARACTERISTICS OF GEOPOLYMERS BASED ON AN INDUSTRIAL WASTE PRODUCT
- 2018Rheological and mechanical properties of alkali-activated brick powder based pastes: effect of amount of alkali activatorcitations
- 2018Effect of particle size of waste brick powder on the properties of alkaline activated materialscitations
- 2018Rheological Properties of Alkali-Activated Brick Powder Based Pastes: Effect of Alkali Activator and Silicate Moduluscitations
- 2017Lime-based plasters with combined expanded clay-silica aggregate: Microstructure, texture and engineering propertiescitations
- 2017Improvement of Properties of Aluminosilicate Pastes Based on Optimization of Curing Parameters
- 2014Physico-mechanical and microstructural properties of rehydrated blended cement pastes
- 2011Commercial renovation renders: mechanical, hygric, thermal and durability properties
- 2009Fly ash influence on the properties of high performance concrete
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document
Influence of biopolymeric water-retaining admixtures on hydration of Portland cement studied using isothermal calorimetry
Abstract
Viscosity enhancing and water-retaining admixtures based on the cellulose ethers are widely used in the building industry to improve the properties of concrete and ready-mix mortars. The study focuses on the influence of the alternative natural viscosity enhancing admixtures (sodium salt of alginic acid, carrageenan, diutan gum, xanthan gum, and hydroxypropyl derivatives of guar gum and chitosan) in doses of 0.1%, 0.5%, and 1% of the binder weight on the cement hydration. The study is carried out using isothermal calorimetry studying the heat flow and the total heat evolved during the reaction from the very beginning – the water-introduction into system. All of the studied biopolymers showed the set retarding ability as they are all of polysaccharidic origin. The dosage-dependency was significant for the hydroxypropyl guaran and diutan gum, while retarding effect of other admixtures varied only slightly with the amount of biopolymer in the studied range of doses. However the studied admixtures were less effective in the delay of accelerating period, as well as the reduction of total heat generated during the reaction, in comparison with cellulose ethers. Other admixture than hydroxypropyl guar gum or diutan gum should be chosen if the set-retarding ability is not appropriate for the mixture use, otherwise the advantage over cellulose ethers will not be significant.