People | Locations | Statistics |
---|---|---|
Naji, M. |
| |
Motta, Antonella |
| |
Aletan, Dirar |
| |
Mohamed, Tarek |
| |
Ertürk, Emre |
| |
Taccardi, Nicola |
| |
Kononenko, Denys |
| |
Petrov, R. H. | Madrid |
|
Alshaaer, Mazen | Brussels |
|
Bih, L. |
| |
Casati, R. |
| |
Muller, Hermance |
| |
Kočí, Jan | Prague |
|
Šuljagić, Marija |
| |
Kalteremidou, Kalliopi-Artemi | Brussels |
|
Azam, Siraj |
| |
Ospanova, Alyiya |
| |
Blanpain, Bart |
| |
Ali, M. A. |
| |
Popa, V. |
| |
Rančić, M. |
| |
Ollier, Nadège |
| |
Azevedo, Nuno Monteiro |
| |
Landes, Michael |
| |
Rignanese, Gian-Marco |
|
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
Organizations | Location | People |
---|
article
Rheology of natural hydraulic lime pastes modified by non-traditional biopolymeric admixtures
Abstract
Viscosity enhancing admixtures, widely used to improve characteristics of concrete and ready-mix mortars, are mainly different derivatives of cellulose. Due to the nature of cellulose processing, the environmental-friendlier alternatives should be studied in order to reduce the impact of the building industry on the environment. The rheological study of natural hydraulic lime (NHL) grouts modified by four different biopolymers is carried out to investigate their behaviour in the NHL-based mortars. The biopolymers studied are of seaweed (sodium salt of alginic acid (ALGNA) and carrageenan (CG)) and microbial (diutan gum (DG) and xanthan gum (XG)) origin. The effect of addition of these admixtures in the doses of 0.1%, 0.5%, and 1% was studied using hybrid rheometer with DIN concentric cylinders geometry. The flow properties as well as viscoelastic properties were studied. The addition of any of the admixtures led to the increase in yield stress, with DG being the most effective admixture. Desirable increase in consistency coefficient was observed within the pastes with CG and DG addition having growing dosage dependency, the ALGNA addition also increased the coefficient noticeably, but it was furtherly decreased with growing dose of admixture. The fluidity index lower than 1 expressed shear-thinning behaviour of studied pastes, except the pastes with highest dose of admixtures, and all of the XG pastes. The addition of CG and DG supported the stability of the grout expressed as the increase in critical strain, thus prolongation of linear viscoelastic region. The flow strain was increased by all of the studied admixtures promoting the gel-like behaviour of the pastes. Complex modulus and viscosity measured at 1Hz frequency were unaffected by the DG addition while they were increased notably by addition of other admixtures with ALGNA and XG supporting the resistance to deformation of the grouts studied. Correspondingly to complex modulus increase, the loss tangent is diminished, reporting more elastic behaviour of ...