• Hela, Rudolf
• Pikna, Ondrej
• Ťažký, Martin

Abstract

Durability of concrete against various aggressive influences, which indicates the lifetime of a construction, is often the main criterion upon designing of up-to-date concretes. These aggressive influences may also include the effect of mechanical wear of a composite caused by abrasion. Recent researches and published studies on this topic are dealing mainly with the effect of input raw materials, concretely, the aggregate type or mineral additives, on the abrasion resistance of cement composite. The presented article aims on the problematics of various methods of concrete mix processing from the mechanical abrasion resistance point of view. These processing methods may include the traditional vibrated reference concrete, self-compacting concrete and semi-dry concrete used for production of vibropressed concrete prefabricates. Designed concrete mixtures illustrate the above-named methods for production of concrete components exposed to mechanical abrasion whereas comparable mechanical parameters are consistent for all methods and the concrete are made from the same input raw materials. Besides the abrasion resistance of produced concretes, their other physical-mechanical parameters are monitored together with the relationship between these parameters and the resistance to mechanical abrasion.

Topics

• impedance spectroscopy
• mineral
• composite
• cement
• durability