Abstract
The frequent closure of roads for the sake of maintenance and refurbishment is an increasing problem for the road administrators and users, because of induced high costs, restrictions and influence they impose, traffic jam, and the many other disruptions such interventions have on traffic. In these circumstances, carriageways with long life span, with adapted tar, have much to offer, especially if they can exhibit optimum performances without requiring major repairs for over 30 years. On high traffic roads, research have shown that binders with elevated modules are a reliable and credible alternative to render their life span more sustainable and durable. In this context, the advantages presented by the absence of important repairs and refurbishing can be enough to justify the initial high costs of these advanced carriage way coatings. Studies on the different binders to be used were done, which have permitted in accordance with the performance of the layers, the required tests and the different study levels. Also, this has permitted us to analyze the obtained results and conclude that due to the expected needs, the LA and MDE tests, the PSV tests are the criteria that determine the selection of aggregates; The complexes modular methods, fatigue resistance (level IV), seem to be necessary for the forecasting of the mechanical behavior of bituminous materials.
Highlights
Transport infrastructure, including roads, airports, ports and railways, is the foundation on which the development and competitiveness of a country's economy must be built
Our study was interested in the formulation study and its optimization and at the end of this study, we came to the conclusion that; in order to optimize the service life of our roads and for high traffic roads such as motorways and national roads
Climatic conditions, the geotechnical context and a selection of materials with high intrinsic characteristics for the different layers of the road structure must be taken into account
Summary
Transport infrastructure, including roads, airports, ports and railways, is the foundation on which the development and competitiveness of a country's economy must be built. They reduce production and transaction costs, facilitate activity, increase the volume of production and drive social progress. The road provides the link between the zones of complementary economy, production, import, export and consumption within the states and between the states. It ensures human and social links of capital importance because it allows the establishment of cultural, social, political and administrative exchanges which prove to be one of the elements promoting any development. Of the country's 50,000 km of roads, only 24% are in good condition and nearly 8,000 km are paved or 14% [5, 11,12,13,14]
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