Otta seal – the new way to solve problems of maintenance of gravel roads in Lithuania

Abstract

About 34.2% of unbound Lithuanian granular roads, which need to be sealed, are with low traffic volume. The cost of maintenance, loss of time, social discomfort and other problems of travelling on gravel roads bring financial failure annually. Usually, problems of this kind are solving by paving asphalt, but in practice it is very expensive and causes problems of safety road. As the result, the most effective solution for gravel roads by aspects of cost and performance is Otta seal. This paper aims to illustrate the behaviour of Otta seal at traffic and climatic conditions of Lithuania. The experimental research has been done for 26 sections of gravel roads, which were surfaced with the double Otta seal by rehabilitation. There are analysed characteristics of materials and one year’ performance of the double Otta seal in all objects of investigation and based on the results of this research, there are made conclusions.