ANALYSIS AND EVALUATION OF POSSIBILITIES FOR THE USE OF WARM MIX ASPHALT IN LITHUANIA

Production of hot mix asphalt (HMA) requires high energy consumption and exhaustion of CO2 and other environment unfriendly materials. The fumes of HMA are injurious for roadmen and asphalt plant workers. The use of warm mix asphalt (WMA) allows for reducing the HMA production temperatures at which the material is mixed and laid on the road. WMA helps to reduce the working temperature of asphalt up to 30°C. This article presents an overview of different technologies of WMA production, and the advantages and disadvantages of these technologies. The laboratory research includes research of physical and mechanical properties of WMA produced with different technologies and different amounts of additives for temperature lowering. Two different kinds of asphalt were tested in the laboratory. The chemical additives and chemical and natural zeolite were used for WMA production in the laboratory.