Abstract

AbstractLack of tack coat application will not ensure the bonding and continuity of the asphalt pavement layers. However, excess of its application can reduce the friction at the interlayer causing slipping. On the other hand, bituminous tack coat material is very sensitive to temperature changes. The fluctuations in temperature can change the interface adhesion ability. Therefore, it can be said that the interface shear resistance characteristics including interlayer cohesion and friction depended much on the temperature on the tack coat application rate. The paper presents the experimental results on the influence of temperature (25, 40, 60 °C) and rate of tack coat CRS-1 (0, 0.2, 0.5, 0.8 l/m2) on the interlayer cohesion and friction between asphalt layers. The results show that the maximum shear resistance is obtained at the rate of 0.2 (l/m2), and the lowest is for the case of 0.8 (l/m2). Besides, the temperature increases, the interlayer cohesion dramatically decreases while increasing the friction coefficient [except for the case of 0.8 (l/m2)].KeywordsTack coat rateTemperatureInterlayerCohesionFrictionShearAsphalt

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