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Comparative analysis of the coarse aggregate shapes used to manufacturing high performance self-compacting concrete

Publication date: 25.07.2018

Technical Transactions, 2018, Volume 7 Year 2018 (115), pp. 75 - 86

https://doi.org/10.4467/2353737XCT.18.101.8796

Authors

,
Krzysztof Ostrowski
Institute of Building Materials and Structures, Faculty of Civil Engineering, Cracow University of Technology
https://orcid.org/0000-0001-5047-5862 Orcid
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Konrad Oleksik
Faculty of Mining and Geoengineering, AGH University of Science and Technology
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Titles

Comparative analysis of the coarse aggregate shapes used to manufacturing high performance self-compacting concrete

Abstract

Wpływ kształtu kruszywa grubego na właściwości świeżej mieszanki betonowej i wytrzymałość samozagęszczalnego betonu wysokowartościowego (hPsCC) są bardzo znaczące. W  badaniach wydzielono nieregularne i regularne ziarna kruszyw, takich jak bazalt, porfir i granit. Kształt ziaren tych kruszyw został wyznaczony przy pomocy komputerowej analizy obrazu oraz w zgodzie z obowiązującą normą. W  rezultacie zostały wyznaczone wskaźniki kształtu kruszywa, takie jak ar i  r, w  celu podkreślenia różnic w kształcie kruszyw stosowanych do produkcji betonów hPsCC. badania wskazują, iż przy zastosowaniu tego samego systemu kruszenia uzyskano różne parametry kształtu dla analizowanych kruszyw. stwierdzono, iż wskaźniki kształtu kruszywa ar oraz r mogą być opisywane poprzez rozkład uogólnionej wartości ekstremalnej na poziomie istotności wynoszącym 95%.

 

The influence of the shape of coarse aggregate on the properties of fresh concrete mixes, and the strength of high-performance self-compacting concrete (hPsCC) is important issue. In this study, irregular and regular grains were separated from the basalt, porphyry and granite coarse aggregate. The shape of these grains was determining using digital image analysis and was in accordance with the european standard [19]. The aspect ratio (ar) and roundness (r) were ascertained in order to highlight the differences in the coarse aggregate shape used the design hPsCC. The study indicates that using the same crushing system, varied parameters of the shape of coarse aggregates were obtained. It was determined that the best fitting distribution for aspect ratio and roundness at a 95% confidence level is the generalised extreme value distribution. 

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Information

Information: Technical Transactions, 2018, Volume 7 Year 2018 (115), pp. 75 - 86

Article type: Original article

Titles:

Polish:
Comparative analysis of the coarse aggregate shapes used to manufacturing high performance self-compacting concrete
English:

Comparative analysis of the coarse aggregate shapes used to manufacturing high performance self-compacting concrete

Authors

https://orcid.org/0000-0001-5047-5862

Krzysztof Ostrowski
Institute of Building Materials and Structures, Faculty of Civil Engineering, Cracow University of Technology
https://orcid.org/0000-0001-5047-5862 Orcid
All publications →

Institute of Building Materials and Structures, Faculty of Civil Engineering, Cracow University of Technology

Faculty of Mining and Geoengineering, AGH University of Science and Technology

Published at: 25.07.2018

Article status: Open

Licence: None

Percentage share of authors:

Krzysztof Ostrowski (Author) - 50%
Konrad Oleksik (Author) - 50%

Article corrections:

-

Publication languages:

English