Abstract
Waste and industrial by-products represent a significant percentage of the industrial landfill. The evaluation of these products has a dual effect: it avoids both the landfill (risk of environmental pollution) and limits the use of natural aggregates (depletion of natural resources and landscape fragmentation and the imbalance of the ecosystem). In recent years, applications for industrial waste have been taken into account in the construction of roads with a great interest in many industrialized countries and developing countries. The use of these materials in the construction of the road is a decision based on technical, economic and ecological criteria. In Algeria, the steel plant of El-Hadjar (Annaba), due to its activity generates a significant industrial waste (slag) which creates a storage problem and pollution. For industrialized countries, this product is an abundant raw material at low cost that must be used on a large scale public works. Our study implies the use of slag in the preparation of the subgrade and surface course (as coated). The results of chemical, physical and mechanical analyses of El-Hadjar slag and materials developed, compared to those of natural aggregates, can be used as aggregate in road construction.
Highlights
Nowadays, the elimination of various waste products from different industries is a serious problem
Waste and industrial by-products represent a significant percentage of the industrial landfill
Applications for industrial waste have been taken into account in the construction of roads with a great interest in many industrialized countries and developing countries
Summary
The elimination of various waste products from different industries is a serious problem These materials have an environmental pollution in the nearby community in recent years; applications of industrial wastes have been taken into account in road construction with a great interest in many industrialized and developing countries [1]. The use of these materials in the construction of roads is a decision based on technical, economical and ecological criteria [2,3,4,5]. Construction and road maintenance require huge amounts of aggregates, rather restrictive specification road that only certain categories of materials are commonly used [6,7] These industrial wastes represent a significant percentage of the industrial landfill. For asphalt mixture used in proportions, aggregate and binder to wait for better mechanical characteristics is selected by introducing a percentage of slag in the formulation, while retaining single type of bitumen for the first time
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