Análise de propriedades físicas e mecânicas de misturas asfálticas recicladas a frio com emulsão asfáltica e cimento Portland e a influência de cada material

Abstract

In the pavement engineering practice, new techniques of recycling of old materials have been developed in order to decrease the exploration of natural resources. Among the alternative materials that have been used, there is the RAP (Reclaimed Asphalt Pavement), which can be incorporated to other materials, such as Portland cement and asphalt emulsion, to produce new layers of pavement. Despite increasing use of cold recycling asphalt mixes, there is lack of consensus on the best methodology to design this type of asphalt mix, which is mainly credited to the lack of specific knowledge on the influence of each one of its constituents and the interaction among them. This paper has the main objective of evaluating the behavior of the materials involved in the mixes, based on the literature and on mechanical and volumetric properties. The results show that the properties are improved with the cement addition, whereas the emulsion tends to change the type of failure of the mixes.