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Žižlavský, Tomáš
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Publications (6/6 displayed)
- 2024Omítky s vodoretenčními přísadami ; Mortars with water retaining admixtures
- 2021Foam Glass Dust as a Supplementary Material in Lime Mortarscitations
- 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
- 2018Rheological Properties of Lime Mortars with Guar Gum Derivativescitations
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document
Rheological Properties of Lime Mortars with Guar Gum Derivatives
Abstract
In this paper, the behaviour of fresh lime mortars modified by etherified derivatives of guar (hydroxypropyl guar (HPG), carboxymethyl hydroxypropyl guar (CMHPG) and native guar gum (GG)) is assessed with the purpose of exploring a new application of such derivatives as lime mortar admixtures. The rheological parameters (relative yield stress, consistency coefficient and fluidity index) and viscoelastic properties were correlated with flow table tests, relative density measurements, water retention abilities of mortars and air content in mortars. Results were seen to be strongly dependent on substituents of the guar. Non-ionic derivative (HPG) exhibited the biggest impact on the yield stress and elastic properties of the mortars. The ionic CMHPG showed the thickening effect. GG had low impact on water retention, while HPG and CMHPG displayed high water retention capability.