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DRAGOMIROVÁ, J. PALOU, M. KUZIELOVA, E. ŽEMLIČKA, M. NOVOTNÝ, R. GMÉLING, K.
Originální název
Optimization of cementitious composite for heavyweight concrete preparation using conduction calorimetry
Typ
článek v časopise ve Web of Science, Jimp
Jazyk
angličtina
Originální abstrakt
The present work investigates the hydration heat of different cement composites by means of conduction calorimetry to optimize the composition of binder in the design of heavyweight concrete as biological shielding. For this purpose, Portland cement CEM I 42.5 R was replaced by a different portion of supplementary cementitious materials (blast furnace slag, metakaolin, silica fume/limestone) at 75%, 65%, 60%, 55%, and 50% levels to obtain low hydration heat lower than 250 j g(-1). All ingredients were analyzed by energy dispersive X-ray fluorescence (EDXRF) and nuclear activation analysis (NAA) to assess the content of major elements and isotopes. A mixture of two high-density aggregates (barite and magnetite) was used to prepare three heavyweights concretes with compressive strength exceeding 45 MPa and bulk density ranging between 3400 and 3500 kg m(-3). After a short period of volume expansion (up to 4 h), a slight shrinkage (max. 0.3 degrees/degrees degrees) has been observed. Also, thermophysical properties (thermal conductivity, volumetric specific heat, thermal diffusivity) and other properties were determined. The results showed that aggregate content and not binder is the main factor influencing the engineering properties of heavyweight concretes.
Klíčová slova
Cementitious composites; Hydration heat; Heavyweight concrete; Aggregates; Radioactive isotope; Mechanical properties; Thermophysical properties
Autoři
DRAGOMIROVÁ, J.; PALOU, M.; KUZIELOVA, E.; ŽEMLIČKA, M.; NOVOTNÝ, R.; GMÉLING, K.
Vydáno
17. 9. 2020
Nakladatel
Springer
Místo
DORDRECHT
ISSN
1588-2926
Periodikum
Journal of Thermal Analysis and Calorimetry
Ročník
142
Číslo
1
Stát
Maďarsko
Strany od
255
Strany do
266
Strany počet
12
URL
https://link.springer.com/article/10.1007/s10973-020-09530-0
Plný text v Digitální knihovně
http://hdl.handle.net/11012/195815
BibTex
@article{BUT165064, author="Janette {Dragomirová} and Martin {Palou} and Eva {Kuzielova} and Matúš {Žemlička} and Radoslav {Novotný} and Katalin {Gméling}", title="Optimization of cementitious composite for heavyweight concrete preparation using conduction calorimetry", journal="Journal of Thermal Analysis and Calorimetry", year="2020", volume="142", number="1", pages="255--266", doi="10.1007/s10973-020-09530-0", issn="1588-2926", url="https://link.springer.com/article/10.1007/s10973-020-09530-0" }