Projekt se zabyva studiem procesu v cementovych kompozitech pri expozici vysokymi teplotami. Bude ana- lyzovano chovan slozek cementoveho kompozitu a jejich vzajemna interakce pri pusoben vysokych teplot. Budou sledovany serie vzorku cementovych kompozitu s vybranymi typy cementu, s ruznymi typy kameniva vcetne lehkych kameniv, vlaken a prmes pri teplotním zatížení. Budou stanoveny klcove faktory ovlivnu- jc porusen cementovych kompozitu pri teplotnm zatzen. Vzorky budou zatezovany na ruzne intenzity s ruznymi izotermickymi vydrzemi, za postupneho narustu na danou teplotu, tak i s sokovym zatzenm. Po teplotnm zatzen bude provedena diagnostika se zamerenm na sledovan zmen fyzikalne-mechanickych vlastnost, zmen ve strukture, porovitosti cementove matrice, prtomnosti trhlin v matrici a v kamenivu. Po- znatky budou podkladem pro stanoven aspektu nutnych k dosazen vyss odolnosti cementoveho kompozitu vuci vysokym teplotam, a to s ohledem na skladbu kompozitu, pouzit typu kameniva, cementu, prmes, vlaken.

Popis anglicky
The project focuses on basic principles of behaviour of cement composite exposed to high temperatures with respect to properties of individual components (type of cement, mineralogical composition of aggregate, presence of ber reinforcement, porosity of cement matrix). Behavior of individual components of cement composite exposed to high temperatures with respect to their proportion and interaction on the structure of composite are studied. Series of samples from cement composites with selected types of cement, aggregate (including lightweight), and ber will be evaluated after temperature-time exposure. Test samples will be exposed to temperatures of dierent intensity with dierent isothermal dwells both with the gradual increase up to the given temperature and the shock exposure to a certain temperature. Processes taking place in the structure of composite exposed to extreme thermal load will be observed and analyzed. Possibilities of increasing resistance of composite will be solved with respect to composition, selection of types of aggregate, cement, additions and bers.

Klíčová slova
cementový kompozit, cement, příměs, kamenivo, tepelné zatěžování

Klíčová slova anglicky
cementitous composite, cement, addition,aggregate, heatloading

GAP104/12/1988

čeština

Bodnárová Lenka, doc. Ing., Ph.D. - hlavní řešitel

Ústav technologie stavebních hmot a dílců
- odpovědné pracoviště (1.1.1989 - nezadáno)
Ústav technologie stavebních hmot a dílců
- příjemce (1.1.2012 - 31.12.2015)

BODNÁROVÁ, L.; MACHÁŇOVÁ, P.; KOPKÁNĚ, D.; HERKA, P.; SŤAHEL, P. Application of polypropylene fibre with various surface treatments in concrete. In Book series. Švýcarsko: Trans Tech Publications Ltd, 2014. p. 75-79. ISBN: 9783038353171.
Detail

BODNÁROVÁ, L.; VÁLEK, J.; SITEK, L.; FOLDYNA, J.; KLICH, J. Concrete damaged by high temperature – possibilities of treatment with high speed water jet. In Sborník přednášek konference o technologii vodního paprsku Vodní paprsek 2015 – výzkum, vývoj, aplikace. Ostrava 2015: Ústav geoniky AV ČR, v. v. i., 2015. p. 7-12. ISBN: 978-80-86407-56-2.
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VÁLEK, J.; BODNÁROVÁ, L.; NOVOSAD, P. Failure of Concrete at High Temperatures - The Influence of the Type of Cement. In Binders, Materials and Technologies in Modern Construction II. Materials Science Forum. Karel Dvořák, Dominik Gazdič, Iveta Hájková, Radek Magrla. Switzerland: Trans Tech Publication, 2016. p. 190-195. ISBN: 9783038357407. ISSN: 0255-5476.
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MIKULICA, K.; HELA, R.; DUFKA, A. Determination of Properties of Concrete Floor After a Fire and Renovation. In Special Concrete and Composites 2015. Key Engineering Materials (print). 2015. p. 33-38. ISBN: 978-3-03835-579-3. ISSN: 1013-9826.
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BODNÁROVÁ, L.; HROUDOVÁ, J.; ZACH, J.; SOVOVÁ, K. Determination of Thermal Conductivity on Lightweight Concretes. In Special Concrete and Composites 2015. Key Engineering Materials (print). Pavel Reiterman. Švýcarsko: Trans Tech Publications, 2016. p. 163-168. ISBN: 978-3-03835-579-3. ISSN: 1013-9826.
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HELA, R.; ŤAŽKÝ, M.; BODNÁROVÁ, L. POSSIBILITIES OF DETERMINATION OF OPTIMAL DOSAGE OF POWER PLANT FLY ASH FOR CONCRETE. Jurnal Teknologi (Sciences and Engineering), 2016, vol. 78, no. 5-3, p. 59-64. ISSN: 2180-3722.
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BODNÁROVÁ, L.; NOVÁKOVÁ, I.; STAVAŘ, T.; HELA, R. Evaluation of Disruption of Concrete Caused by Exposure to High Temperatures by Initial Surface Absorption Test. Malaysia: Malaysia Technical Scientist Association, 2015. p. 2-2.
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HELA, R.; BODNÁROVÁ, L. POSSIBILITIES OF USING FLUIDIZED FLY ASH FROM LOW-TEMPERATURE COMBUSTION FOR MANUFACTURE OF CONCRETE. In International Conference on Advanced Technology & Sciences. 2. Turecko: 2015. p. 353-358. ISBN: 9786059119269.
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NOVÁKOVÁ, I.; STAVAŘ, T. CHARACTERISTICS OF RECYCLED CONCRETE AGGREGATES MADE OF DEFECTIVE ELEMENTS FORM PRECAST PRODUCTION. 2015. ISBN: 9786066853125.
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NOVÁKOVÁ, I.; BODNÁROVÁ, L.; HELA, R.; DIEDERICHS, U. CHANGES OF CONCRETE CHEMICAL COMPOSITION DUE TO THERMAL LOADING DETECTED BY DTA ANALYSIS. In 4th International Workshop on Concrete Spalling due to Fire Exposure. Leipzig, Germany: MFPA Leipzig GmbH, 2015. p. 32-40. ISBN: 978-3-9814523-6-5.
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VÁLEK, J. VÝZKUM A VÝVOJ KOMPOZITNÍCH MATERIÁLŮ S VYŠŠÍ REZISTENCÍ VŮČI PŮSOBENÍ VYŠŠÍCH TEPLOT. Brno: Ing. Jaroslav Válek, 2014. s. 1-188.
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NOVÁKOVÁ, I.; BODNÁROVÁ, L.; STAVAŘ, T.; HELA, R. EVALUATION OF DISRUPTION OF CONCRETE CAUSED BY EXPOSURE TO HIGH TEMPERATURES BY INITIAL SURFACE ABSORPTION TEST. ARPN Journal of Engineering and Applied Sciences, 2015, vol. 10, no. 15, p. 6299-6304. ISSN: 1819-6608.
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BODNÁROVÁ, L.; HELA, R. Development of High-Volume High Temperature Fly Ash Concrete. Applied Mechanics and Materials, 2015, vol. 2015, no. 752-753, p. 544-551. ISSN: 1660-9336.
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BODNÁROVÁ, L.; DUFKA, A. The analysis of the behavior of alkali-activated materials applied as a repair mortar. Advanced Materials Research, 2015, vol. 1, no. 1, p. 50-55. ISSN: 1022-6680.
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BODNÁROVÁ, L.; HORÁK, D.; VÁLEK, J.; HELA, R.; SITEK, L. POSSIBILITIES OF OBSERVATION OF BEHAVIOR OF CONCRETE AND CEMENT BASED COMPOSITE MATERIALS EXPOSED TO HIGH TEMPERATURES. MATERIALS RESEARCH INNOVATIONS, 2015, vol. 1, no. 1, p. 5936-5940. ISSN: 1432-8917.
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BODNÁROVÁ, L.; SITEK, L.; SOUČEK, K.; STAŠ, L.; GURKOVÁ, L. Analysis of Inner Structure Changes of Concretes Exposed to High Temperatures using Micro X-ray Computed Tomography. Acta Geodynamica et Geomaterialia, 2015, vol. 12, no. 1, p. 79-89. ISSN: 1214-9705.
Detail

BODNÁROVÁ, L.; SITEK, L.; SOUČEK, K.; STAŠ, L. Use of X-ray CT for analysis of concretes exposed to high temperatures. In GECO 2014. Ostrava: 2014. p. 87-88. ISBN: 978-80-86407-49-4.
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SEDLMAJER, M.; ZACH, J.; HROUDOVÁ, J.; BODNÁROVÁ, L. Temperature Control in High Performance Concrete. In Advanced Materials Research/Binders, Materials and Technologies in Modern Construction. Advanced Materials Research. Švýcarsko: Trans Tech Publications, 2015. p. 162-165. ISBN: 978-3-03835-452-9. ISSN: 1022-6680.
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BODNÁROVÁ, L.; VÁLEK, J.; NOVOSAD, P. Testing of Action of Direct Flame on Concrete. The Scientific World Journal, 2015, vol. 2015, no. 1, p. 1-8. ISSN: 1537-744X.
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BODNÁROVÁ, L.; SITEK, L.; VÁLEK, J. Behaviour of concrete in tunels and undeground concstructions in case of fire. In GECO 2014. Ostrava: 2014. p. 85-86. ISBN: 978-80-86407-49-4.
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Odpovědnost: Bodnárová Lenka, doc. Ing., Ph.D.