Abrasive 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 concrete

0535539 - ÚGN 2021 RIV CH eng J - Článek v odborném periodiku
Bodnárová, L. - Ťažký, M. - Ťažká, L. - Hela, R. - Pikna, O. - Sitek, Libor
Abrasive 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 concrete.
Sustainability. Roč. 12, č. 23 (2020), č. článku 9920. E-ISSN 2071-1050
Grant CEP: GA ČR GA18-25035S
Institucionální podpora: RVO:68145535
Klíčová slova: concrete composite * abrasion * type of aggregate * mineral additives * fiber * durability * concrete strength
Obor OECD: Civil engineering
Impakt faktor: 3.251, rok: 2020
Způsob publikování: Open access
https://www.mdpi.com/2071-1050/12/23/9920

Virtually every concrete structure comes into contact with abrasive effects of flowing media or solids, which have a direct impact on the durability of concrete. An abrasive effect is most pronounced in transport or water management structures, and these structures are often designed for a significantly longer service life (usually 100 years). This research evaluates the influence of the filler component in terms of the type of aggregate and its mineralogical composition on concrete abrasion resistance. As part of the impact of the binder component, several concrete mixtures were produced using the same aggregate and maintaining the same strength class with the addition of different types of active and inert mineral additives. In other parts of the research, the effect of adding fiber reinforcement on the abrasion resistance of concrete was verified. Mutual connections and correlations in different age groups (7, 28 and 90 days) were sought for all obtained results. The abrasion resistance of the composite was monitored by using standard procedures, especially using a Böhm device. It was found that for good abrasion resistance of concrete, it is not necessary to produce concretes with high strength classes using often expensive mineral additives (microsilica) and quality aggregates, but the maturation time of the composite and its microstructure plays an important role.
Trvalý link: http://hdl.handle.net/11104/0313544