Fresh and hardened state of fibre concrete

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26232511%3A_____%2F17%3AN0000023" target="_blank" >RIV/26232511:_____/17:N0000023 - isvavai.cz</a>
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Fresh and hardened state of fibre concrete
Original language description
The aim of research works was to find suitable homogenization techniques, design of mixing process and optimal dosing of individual components. By means of these actions it is possible to achieve the best dispersion of selected fibre types, both metal and non-metal, in fine-grained cementitious matrixes, which is subsequently verified in hardened composites at first by non-destructive and then by destructive methods. The Research Institute for Building Materials designed new experimental devices for the Discovery Hybrid Rheometer (DHR-1) to measure rheological properties of fresh cement-based mixtures. They are three-blade and three-ball agitators with a complementary role for absolute measurements using a system of coaxial cylinders. For slurries with low viscosity blade agitators are used and for higher viscosity suspensions ball agitators or a board-to-board system with roughened surface may be used. In order to measure highly heterogeneous suspensions, such as cement paste and mortar, a helical rotor was designed and manufactured. The advantage of its use is that during measurements the material is carried by the rotor and heavier particles do not settle which avoids slippage like when coaxial cylinders or bladed rotors are used.
Czech name
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Czech description
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Project
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Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2017
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
The 12th Central European Congress on Concrete Engineering Innovative materials and technologies for concrete structures
ISBN
978-963-12-9651-8
ISSN
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e-ISSN
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Number of pages
8
Pages from-to
171-178
Publisher name
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Place of publication
Budapest
Event location
Tokaj
Event date
Sep 1, 2017
Type of event by nationality
EUR - Evropská akce
UT code for WoS article
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