Structural-sensitive properties of self-healing asphalt concrete

The statistical data analysis was performed for 10 different properties of asphalt concrete determined according to GOST 31015–2002 and the optimization of the set of quality indicators was performed. Three characteristics sufficient for assessing the quality of self-healing asphalt concrete were identified. The compressive strength limit at 0 and 20оC and the splitting strength limit at 0оC are the quality system indicators sensitive to the self-healing process. It was found that the self-healing index is inversely proportional to the relative deformations to which the asphalt concrete sample is subjected when determining the physical and mechanical properties. The use of AR polymer in capsules allows achieving a greater self-healing effect compared to capsules containing vegetable oil. The use of capsules with vegetable oil is advisable only when combating cracks formed as a result of thermal-oxidative aging of asphalt concrete bitumen.