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The main purpose of this research is to analyse the influence of different natural aggregate sources, as well as different bitumen types, on the adhesion and affinity between the two materials and on the properties of stone mastic asphalt (SMA). The aggregates used in this study were both fine (sand 0/4) and coarse (4/8 and 8/16), extracted from four different natural rock quarries in Romania, selected after a geographical, geological and geomorphological analysis. From a petrographic point of view, the rocks extr...

Recycling - the process of transforming waste into new materials - represent a modern alternative for eliminating waste and reducing emissions of greenhouse gases. Recycling - part of the 3Rs (Reduce, Reuse, Recycle) in the hierarchy of waste ? helps to reduce the consumption of raw materials and to reduce energy consumption, air pollution (in phase of combustion waste) and water (in phase of waste storage). Among the recyclable materials such as glass, paper, plastic, metal, textiles are used tires. These tires a...

Superior capitalization of industrial waste as: slag heaps, plastics and rubber, vegetable and animal oils, natural or synthetic fibers, make significant contributions to reducing pollution, environmental protection, to increase eco-efficiency, reduce production costs per km of paved road. From the point of view of physical and mechanical properties most suitable materials that can replace mineral aggregates are blast furnace slag which after waste processing and sorting through the appropriate dimensions can succ...