The master’s thesis addresses the temperature segregation problem in asphalt mixture placement. The core of the content is adequacy evaluation of the Slovenian technical legislation regarding the control of temperature segregation, which occurs due to different cooling of the asphalt mixture during transport and placement. The master's thesis first describes asphalt mixtures in general, their composition and classification. Next, the temperature segregation is presented. Literature reports the latter to be a very common problem that occurs during the placement of asphalt mixture. Temperature segregation impairs the properties of the asphalt mixture, which can reduce its lifetime by as much as 50% or more. All this leads to an increase in costs as the asphalt pavement needs to be repaired prematurely. In the master's thesis the use of an IR thermography, which enables an efficient detection of the temperature segregation, is presented. The Slovenian technical legislation regarding the temperature control during the placement of asphalt mixture is further examined. In addition, specifications from the USA, Sweden and Norway are reviewed, as they set out procedures for controlling temperature segregation.
After the theoretical description of the topic, the performed temperature measurements are presented. Measurements were carried out during the project of Videž toll station removal on the A1 highway, where part of the highway was reconstructed. The temperature was measured in several ways, using an IR thermometer, a contact thermometer, a thermal camera and an IR temperature scanner. Measurements were carried out and evaluated in accordance with Slovenian and foreign specifications. Measurements showed that during the asphalt placement temperature segregation occurred, which the control prescribed by Slovenian technical legislation failed to fully detect or evaluate. On the other hand, foreign specifications have successfully evaluated temperature segregation, as they have prescribed procedures and criteria for evaluating the considered problem. The last chapter of the master's thesis addresses measures that can be taken if the temperature segregation occurs and measures that can be taken to prevent it. In the conclusion, findings, comments and suggestions for improving the Slovenian technical legislation are given.