Influence of micro polypropylene fibers on the deicers resistance of road concrete

Abstract

The resistance of concrete surface to action of deicers is crucial engineering property in the field of transport structures in cold regions. Combined action of deicers and freezing-thawing cycles requires high durability performance of such concrete mixtures, because it determines the service-life of the given structure. Certain measure is the air-entrainment of the fresh concrete, however the frequently loaded areas exposed often aftermethodology Afew years of service are exhibiting large damage due to the abrasion. Hence, the concrete mixture is in these cases reinforced by the addition of fiber reinforcement, that increases ductility of the concrete and prevents propagation of the cracks. This paper deals with the experimental assessment of concrete mixtures containing micro polypropylene fibers and their influence on the resistance to deicers, which is prescribed parameter during the construction of concrete roads. The results confirmed previous practical experiences, that polymer fibres may increase surface spalling and thus caused the decay of the resistance to deicers. However, all studied mixtures sufficiently fulfilled the required level prescribed by the regulations.