Ischenko O. Development of a technique of account on temperature stability from cracks of asphalt concrete of artificial features of roads.

Thesis is devoted to temperature cracking resistance of pavement on highway artificial constructions and ways of ensuring it. Temperature cracking resistance of asphalt-concrete surfacing is considered in a zone lying bitween deformed joints on the most widespread Ferro-concrete elements running units of artificial Ferro-concrete constructions. On the basis of road maintenance analysis calculating schemes of asphalt-concrete surfacing operation have been developed. These schemes take into account main constructive features of artificial construction pavement as well as the regularity of temperature deformation. Also they reflect the temperature regime nature of asphalt-concrete surfacing and Ferro-concrete elements. Analytical dependences on determination of thermal stresses and borderline state of asphalt-concrete surfacing under variations in temperature in annual and daily cycles have been obtained. Theoretical researches have been used as a basis for the development of calculation methodic of asphalt-concrete surfacing artificial construction on temperature cracking resistance. Based on experimental researches and numerical analysis the reliability of theoretical principles have been shown. Temperature cracking analysis of asphalt-concrete surface has been made and regularities of ensuring its temperature cracking resistance have been determined. Bases on this methodics the calculations have been carried aut and practical recommendations for temperature cracking resistance of artificial constructions asphalt-concrete surfacing for highways have been developed. Key words: temperature cracking resistance, asphalt-concrete surface of artificial constructions, artificial construction pavement, thermorheological properties, thermal stress state, borderline state, longevity.