ДОСЛІДЖЕННЯ ВПЛИВУ НАПОВНЮВАЧІВ РІЗНОГО ПОХОДЖЕННЯ НА ВЛАСТИВОСТІ АСФАЛЬТОБЕТОНІВ

Abstract

Introduction. The properties of a bituminous material are determined by the peculiarities of the bonds that arise between individual mineral grains and depend on the properties of bitumen, the thickness of the bitumen layer covering the mineral grains, as well as on the processes of interaction between mineral materials and bitumen on their common interface. To ensure a strong and stable bond between the grains, bitumen should evenly cover the surface of the mineral materials with a thin layer. To increase the strength of the pavement constructed from bituminous material, it is necessary that the maximum amount of bitumen is adsorbed by the mineral material, and the content of free bitumen is reduced to a minimum value. Problem Ыtatement. Depending on the nature of the mineral material and the chemical composition of the bitumen, the properties of its thin layers change in different ways. The strength of bitumen in a thin layer on an active mineral surface increases with decreasing thickness, while on an inactive surface the strength of bitumen changes little with decreasing layer thickness. Objective. The present study was devoted to determining the effect of aggregates of different origins on the volumetric properties of asphalt concrete and the mechanical properties of asphalt concrete, as well as on their weather resistance. Materials and methods. Mineral filler from limestone, granite, quartzite, and fly ash was used for the study. Results. The results of the research showed that the type of aggregate has virtually no effect on changes in the volumetric and mechanical properties of asphalt concrete. However, at the same time, asphalt concrete with different aggregates differs significantly in water and frost resistance.