Asphalt concrete is the main type of coating the streets of the city of Bryansk and other cities of the Bryansk region, as well as roads outside settlements. A survey of the condition of asphalt concrete pavement of the streets of Bryansk and some parts of roads of other cities of the Bryansk region (streets of Surazh, Klintsy, Unecha, etc.) showed that in many areas there are surface destruction in the form of cracks: transverse, longitudinal and «grid». The presence of a crack in the coating of the road-reducing the load – bearing capacity of the road structure at the place of its formation.
The crack resistance of asphalt concrete decreases during the operation of the coating due to a number of reasons: deterioration of the properties and structure of asphalt concrete under the influence of internal and external factors (water, freezing-thawing, air oxygen, ultraviolet and infrared irradiation, the nature and degree of interaction of bitumen with mineral material, the structure and composition of bitumen, etc.), low-temperature stretching, aging of the binder, etc.
The authors of these studies set the task to check the quality of the properties of bitumen BND 60/90 and BND 90/130 with the introduction of polymer additives, carbon black, etc., as well as asphalt concrete mixtures with the introduction of polystyrene and polyurethane foam and other additives in the construction of road surfaces in hot summer climatic conditions to increase the crack resistance of asphalt concrete coatings.
The paper presents an analysis of the main parameters of transverse cracks in the city of Bryansk on the streets: Fokina, Sovietskaja, Gorbatova, Krahmaleva, as well as road surfaces of the Bryansk region.
Study of crack resistance of asphalt concrete pavements of the streets of the city of Bryansk and roads of the Bryansk region
