改性沥青混合料施工温度确定方法的研究

Study on Construction Temperature Determination Method of Modified Asphalt Mixture

改性沥青作为非牛顿流体无法像基质沥青一样通过黏温曲线来确定其施工温度,目前国内外通常采用的经验值往往造成施工和易性差、录用性能降低、能源浪费。利用沥青混合料和易性试验仪的拌和扭矩值来建立基质沥青混合料和改性沥青混合料之间的联系,选择两种基质沥青、两种改性沥青,通过混合料和易性试验验证对比得出:黏温曲线并不适合确定改性沥青混合料施工温度,利用扭矩法能够更加准确地确定改性沥青混合料施工温度。

As a non-Newtonian fluid, the modified asphalt cannot be used as matrix asphalt to determine its construction temperature by the viscosity-temperature curve. At present, the experience value commonly used at home and abroad will often cause the poor construction workability, the performance degradation and the energy waste. The mixing torque value of asphalt workability tester is used to establish the relation between the matrix asphalt mixture and the modified asphalt mixture in order to select two matrix asphalts and two modified asphalts. According to the experimental verification and comparison of the mixture workability, the result shows that the viscosity-temperature curve is not suitable to determine the construction temperature of modified asphalt mixture. The use of torque method can better and exactly determine the construction temperature of modified asphalt mixture.