The Method of Integral Assessment of the Quality of Oil Oxidized Bitumen as a Method for Selecting the Parameters of the Two-Stage Oxidation Process

Based on previous research, we used a multicriteria (integral) quality assessment to determine the priority oxidation temperatures for obtaining oil road bitumen. This method allows one to select the process parameters and ensure the production of high-quality products from paraffin raw materials. Moreover, the method allows for evaluating the effectiveness of the two-stage process at different temperatures. The paper shows the results of calculating standardized coefficients and weight coefficients for each quality indicator, as well as the integral quality indicators showing the quality of road bitumen samples. The research results showed that the priority in quality is given to a bitumen sample obtained at the oxidation temperature of 200 °C at the first stage and 260 °C at the second stage. This bitumen showed the best quality compared to other samples corresponding to GOST 33133-2014, which further confirms the previously obtained results. It is established that the multicriteria integral method of quality assessment can be used in bituminous production to identify the priority quality of bitumen and determine the process parameters depending on the quality of raw materials.