Study on diseases of cement concrete pavement in permafrost regions

Because the study on cement concrete pavement in permafrost regions is not enough, we have made an exploration on it along G214 of China. After that the diseases of pavement along the typical road of G214 in permafrost regions were firstly analyzed based on field investigations. The results indicated that the distribution, reasons and mechanism of diseases of cement concrete pavement were different from that of the adjacent asphalt pavement and the general regions. Moreover, the results indicated that longitudinal fracture and broken slabs were the major types of diseases of cement concrete pavement in permafrost regions. Finally, based on the field measurements of settlement along the G214, a possible critical settlement value of fracture failure was calculated under specific conditions. Analysis of the reasons showed that the diseases of cement concrete pavement in permafrost regions were related to the thermal stability of embankment and thaw deformation of embankment etc.