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The European standards for asphalt mixture testing are mainly focused on empirical parameters of asphalt mixtures. On the other hand, functional parameters (e.g. fatigue, stiffness) of asphalt mixtures describe real behavior of the material in-situ. These parameters are used for design of road construction according to the Slovak design method where the elasticity modulus is used instead of the complex modulus. The problem is that no standard for elasticity modulus measurement exists in the collection of the European standards. In this study complex modulus measurement was performed according to the European standard, and for comparison elasticity modulus measurement was also done according to the Australian standard.

Abstract. The results of measurements of sound pressure levels on an experimental road section (road pavement with addition of crumb rubber from waste tires) in Mala Ida village (Kosice region, Slovakia) and on a road with stone mastic asphalt in Haniska village (Presov region, Slovakia) are presented in the paper. The results obtained using statistical pass-by methods were compared and they confirmed that road surface with addition of crumb rubber from waste tires produced quieter pavement than stone mastic asphalt road pavement alone.

In recent years, roads are deteriorated due to increasing traffic volumes, and they require extensive reconstruction which should be environmentally friendly. This can be done by using new additives and waste and recycled materials in road construction. Recently developed warm mix asphalt technology decreases impact on environment. One of the materials which make it possible to lower production temperature of asphalt mixtures is natural zeolite, which is incorporated into asphalt mixtures in the production process. New asphalt mixtures, however, shall comply with standard requirements for the physical and mechanical properties and the conditions for resistance of the layers and therefore the stiffness modulus of these mixtures has to be measured. One of the other environmental aspects is noise pollution in urban areas, which negatively affects and endangers human health. One of the ways how to suppress this negative phenomenon is to develop new materials for road surfaces taking into account their economic, environmental and quality aspects.

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