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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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Banfill, P. F. G.
Heriot-Watt University
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (19/19 displayed)
- 2019Rheology of lime pastes with biopolymer-based additivescitations
- 2016Rheology of natural hydraulic limes for masonry repair
- 2014Characterisation of rendering mortars by squeeze-flow and rotational rheometrycitations
- 2013Rheological and calorimetric behaviour of cements blended with containing ceramic sanitary ware and construction/demolition wastecitations
- 2013Rheological and calorimetric behaviour of cements blended with containing ceramic sanitary ware and construction/demolition wastecitations
- 2013Rheological behaviour of cements blended with containing ceramic wastes
- 2011Additivity effects in the rheology of fresh concrete containing water-reducing admixturescitations
- 2011Rheology and vibration of fresh concretecitations
- 2011Concentration effects in the rheology of cement pastes: Krieger-Dougherty revisited
- 2009Effect of activation conditions of a kaolinite based waste on rheology of blended cement pastescitations
- 2009Complex impedance and dielectric dispersion in carbon fiber reinforced cement matricescitations
- 2009Alkali activated fly ashcitations
- 2008Rheology of carbon fibre reinforced cement-based mortarcitations
- 2008Rheology and setting of alkali-activated slag pastes and mortars
- 2007Rheology and conduction calorimetry of cement modified with calcined paper sludgecitations
- 2007Improved superplasticisers for high performance concrete: the SUPERPLAST project
- 2007Impact of small amounts of swelling clays on the physical properties of debris-flow-like granular materials. Implications for the study of alpine debris flowcitations
- 2006Rheology of low carbon fibre content reinforced cement mortarcitations
- 2005Properties of alkali-activated fly ashes determined from rheological measurementscitations
Places of action
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article
Characterisation of rendering mortars by squeeze-flow and rotational rheometry
Abstract
This paper reports the first experimental comparison between squeeze-flow at controlled displacement rate and rotational shear at controlled speed for evaluating the rheological behaviour of mortars. Several Brazilian and European rendering products showed a wide range of workability behaviour in both testing modes. The flow curves and hysteresis effects during the shear cycle varied significantly, since the mortar’s composition affects structural breakdown, interfacial slip and phase segregation. The latter plays a critical role during squeeze-flow and is the main reason for the higher loads required to deform the samples at lower rates. A gravimetric-based methodology was developed to assess phase segregation induced by rotational tests. Encouraging agreement between the methods was observed, with yield stress in the structured (unsheared) state showing a good linear correlation. For some mortars showing low segregation it was possible to compare shear viscosity and extensional viscosity and Trouton ratios between 20 and 40 were obtained.