STRUCTURAL AND TECHNOLOGICAL PECULIARITIES OF ASPHALT PAVEMENT CRACK SEALING
Journal Title: Вестник Харьковского национального автомобильно-дорожного университета - Year 2019, Vol 84, Issue
Abstract
In Ukraine a significant part of motor roads with flexible pavement, especially local ones, serves with cracks in asphalt concrete layers during long peri-od. Asphalt concrete spalling in the zone of open crack edges is a further stage of pavement layer de-terioration during its long period of service. Costs for repair of these defects are much higher than for crack sealing. Monitoring of actual condition of flexible pavements in various regions of Ukraine indicates that cracks in asphalt concrete pavement appear in different locations, have different direc-tion and pattern, width, depth and length. Number of cracks, their frequency of location on the pave-ment, length and width of opening at low tempera-tures depend on duration of the pavement exploita-tion. Today there are no exact regulations on struc-tural and technological decisions in terms of crack preparation and sealing with regard to their width and activity in normative and technical documents. The topic of the paper is development of structural and technological decisions for crack preparation and sealing in asphalt concrete pavements with re-gard to their width and activity. It is noted that hot-applied bituminous sealing materials are the most popular in Ukraine for works on crack sealing in asphalt concrete road pavements. Based on the re-sults of scientific and technical supervision of various crack sealing techniques in asphalt concrete road pavements it is shown that crack sealing can be performed with preliminary routing (rectangular rout) in zone of crack or without routing. It is noted that cracks with preliminary routing can be sealed with overband or without overband of sealing mate-rial on the surface of asphalt pavement. Technique of crack sealing by filling of the created rout with bitumen-polymer mastic or hot-applied sealant with overband on asphalt pavement surface provides the highest watertightness and durability of the sealed crack, in comparison with sealing by filling of the created rout flush with asphalt pavement, or without routing. Classification of cracks in asphalt concrete pavements is proposed and structural and techno-logical decisions on crack preparation and sealing are described.
Authors and Affiliations
V. Zhdanyuk, O. Volovyk, K. Tsyrkunova, R. Gnatenko
Keywords
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- EP ID EP554253
- DOI 10.30977/BUL.2219-5548.2019.84.0.82
- Views 96
- Downloads 0
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