Pavement Rehabilitation Options for Developing Countries with Marginal Road-building Materials

摘要

Pavement rehabilitation involves measures used to restore, improve, strengthen or salvage existing deficient pavements so that these may continue, with routine maintenance, to carry traffic with adequate speed, safety and comfort. Developing countries around the world arc facing serious difficulties to maintain their road networks in a good condition. These difficulties include scarcity of suitable road-building materials, lack of funds for maintenance and construction of new roads and road agencies with insufficient well-qualified technical staff. This paper evaluates possible suggestions for developing countries with marginal road-building materials on pavement rehabilitation options in order to maintain the existing road network in a sound condition. The paper evaluates the different types of rehabilitation methods available internationally, as well as their pros and cons. This is followed by an evaluation of the typical process involved in these methods, and analysis of which aspects are affected by scarcity of good road building materials. The possible effects of usage of marginal road building materials on rehabilitation options are evaluated, and recommendations made as to a procedure for adequate evaluation and rehabilitation of such pavements.