Analysis of asphalt concrete pavement quality parameters of Lithuanian highways

Abstract

Planning of road building and repair sectors requires evaluation of the actual state of the road pavement. The available methods of evaluation of the condition and construction of pavement have serious shortcomings: some of them are lacking precision and reliability others are too sophisticated. For this reason they are not very helpful in practice. Based on analysis of previous works and on the experimental results a sufficiently accurate and simple method for evaluation of the state of asphalt concrete pavement is suggested. Present status of the asphalt concrete pavement and its construction and the main causes of their disintegration are discussed. Important principles of road maintenance, ensuring the longer lifetime of asphalt concrete pavement are presented. Factors indicating the state of the pavement are established. Indices of the state of asphalt concrete pavement of roads were analyzed and standard values of these indices suggested. Correlation between the pavement smoothness results according to the international index IRI YIRI and measured with a 4 m long bar is defined. Conclusions and recommendations are given.