LAUSR

The article represents the results of experimental research for temperature and moisture variations in pavements and subgrade of highways located in five different climatic regions, an analysis of cyclic freezing and thawing of a pavement. To measure temperature and moisture in pavements and subgrade the sensors have been used which allow making measurement of these characteristics simultaneously in the points of interest. The peculiarities of variation were analyzed for air temperature, temperature in pavements and subgrade in different regions in warm and cold 24 hours. The differences were established in distribution of temperature and moisture in pavements and subgrade in warm and cold 24 hours. To analyze cyclic freezing and thawing (FT) of a pavement the air temperature values have been used during twenty sequential winter seasons in six geographical points of Kazakhstan. The dependences were established for the number of FT cycles on duration and minimal temperature of the cycles.