| 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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Bodnarova, Lenka
Brno University of Technology
in Cooperation with on an Cooperation-Score of 37%
Topics
Publications (15/15 displayed)
- 2021The Effect of the Composition of a Concrete Mixture on Its Volume Changescitations
- 2020Abrasive Wear Resistance of Concrete in Connection with the Use of Crushed and Mined Aggregate, Active and Non-Active Mineral Additives, and the Use of Fibers in Concretecitations
- 2020Effect of type of aggregate on abrasion resistance of concrete
- 2019Effect of Inorganic SiO2 Nanofibers in High Strength Cementitious Compositescitations
- 2019Erosion Test with High-speed Water Jet Applied on Surface of Concrete Treated with Solution of Modified Lithium Silicatescitations
- 2018Effect of Inorganic SiO2 Nanofibers in High Strength Cementitious Composites
- 2018Study On The Resistance Of High-Performance Concrete To The Selected Chemically Aggressive Environments
- 2018The Effect Of The Addition Of Multi-Walled Carbon Nanotubes On The Properties Of Cementitious Composites
- 2017Impact-Echo Method Used to Testing of High Temperature Degraded Concrete Composite of Portland Cement CEM I 42.5 R and Gravel Aggregate 8/16
- 2017Non-Destructive Testing of High Temperature Degraded Concrete Composite of Portland Cement CEM I 42.5 R and Gravel Aggregate 11/22 by Transverse Wavescitations
- 2016Reduction of concrete´s shrinkage by controlled formation of monosulphate and trisulphate
- 2016Effect of thickness of the intumescent alkali aluminosilicate coating on temperature distribution in reinforced concretecitations
- 2016POSSIBILITIES OF DETERMINATION OF OPTIMAL DOSAGE OF POWER PLANT FLY ASH FOR CONCRETEcitations
- 2015CHANGES OF CONCRETE CHEMICAL COMPOSITION DUE TO THERMAL LOADING DETECTED BY DTA ANALYSIS
- 2015Development of High-Volume High Temperature Fly Ash Concretecitations
Places of action
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document
CHANGES OF CONCRETE CHEMICAL COMPOSITION DUE TO THERMAL LOADING DETECTED BY DTA ANALYSIS
Abstract
The new types of concrete for example high performance concrete (HPC) have higher compressive strength and durability thanks to their lower porosity and denser microstructure. In case of fire the low amount of pores may cause explosive spalling, which can lead to collapse of the entire construction. Besides porosity, there are several other factors and effects which contribute to the formation of explosive spalling. The determining effect seems to be the evaporation of chemically or physically bound water, which is accompanied by volume changes of the CSH phases and gel particles. One of the methods used to gather knowledge concerning changes of chemical components of concrete is the differential thermal analysis (DTA). In this study basic information about chemical changes and liberation respectively desorption of water in the microstructure of high strength concrete is given. The obtained knowledge leads to better understanding of the basics of explosive spalling and crack formation in the microstructure at certain temperatures. In the experiments a series of specimens was exposed to temperatures of 150, 250, 350 and 450°C and then analysed. The DTA, TG and DTG measurements have shown that in some specimens the changes of the components are not that dramatic and therefore the deterioration of the microstructure and risk of explosive spalling would not to be feared.