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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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Vyšvařil, Martin
Brno University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (23/23 displayed)
- 2021Effects of natural zeolite addition on the properties of lime putty-based rendering mortarscitations
- 2021Foam Glass Dust as a Supplementary Material in Lime Mortarscitations
- 2020Fresh state properties of lime mortars with foam glass dust
- 2020Fresh state properties of lime mortars with foam glass dust
- 2020Rheology of natural hydraulic lime pastes modified by non-traditional biopolymeric admixturescitations
- 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
- 2019Rheological and mechanical properties of alkali-activated brick powder based pastes: effect of amount of alkali activatorcitations
- 2018Red-clay ceramic powders as geopolymer precursors: Consideration of amorphous portion and CaO contentcitations
- 2018Hygric parameters of ternary binder based plasters lightweighted by expanded perlite
- 2018Rheological properties and microstructure of binary waste red brick powder /metakaolin geopolymercitations
- 2018Rheological Properties of Lime Mortars with Guar Gum Derivativescitations
- 2018Ternary binder based plasters with improved thermal insulating ability ; Omítky z ternárních směsí s vylepšenými tepelně izolačními schopnostmicitations
- 2018Rheological and mechanical properties of alkali-activated brick powder based pastes: effect of amount of alkali activatorcitations
- 2018Hygric and mechanical parameters of ternary binder based plasters lightweighted by expanded perlitecitations
- 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
- 2017Ternary binder based plasters with improved thermal insulating abilitycitations
- 2016Immobilization of Heavy Metals in Natural Zeolite-blended Cement Pastes citations
- 2015One-year sulfate attack on various types of fine grained concrete
- 2015Microstructural changes of fine-grained concrete exposed to a sulfate attackcitations
- 2014Physico-mechanical and microstructural properties of rehydrated blended cement pastes
- 2009Synthesis and characterization of new imidophosphanes and phosphine oxides containing 3,3,4,4-tetramethylsuccinimidyl group
Places of action
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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.