%0 Journal Article
%T 炭黑改性沥青混合料的动态响应主曲线分析<br>Analysis of Dynamic Response Master Curve of Carbon Black Modified Asphalt Mixture
%A 栗培龙
%A 马松松
%A 李建阁
%A 张东阳
%J 郑州大学学报（工学版）
%D 2018
%X 为了分析炭黑改性沥青的动态响应，在不同试验温度及加载频率下进行基质沥青混合料和炭黑改性沥青混合料的简单性能试验（SPT），分析了两种混合料动态模量和相位角的变化规律，并根据试验数据，采用Sigmoidal模型，得到了沥青混合料的动态模量移位因子及模型参数，形成了两种沥青混合料动态模量和相位角主曲线，并对其进行对比分析。结果表明，炭黑改性沥青混合料的活化能ΔEa和移位因子log[α(T)] 在低于参照温度时小于基质沥青混合料，而在高于参照温度时大于基质沥青混合料，随着加载频率的升高，动态模量主曲线呈“S”型曲线逐渐增大，而相位角主曲线先增大后减小，但不如动态模量主曲线光滑，尤其在低频范围内数据分散。动态模量主曲线和移位因子可以较好地描述加载频率和试验温度对炭黑改性沥青混合料粘弹性响应的影响。炭黑改性沥青混合料在低于37.8℃的动态模量更大，具有更好的抗变形能力；随着温度的升高到超过37.8℃，两种混合料的粘弹性响应差异不大，即在低频或高温条件下的炭黑改性效果不显著。<br>In order to analyze the dynamic response of carbon black modified asphalt mixture (CBMAM), the Simple Performance Test (SPT) was conducted on CBMAM and base asphalt mixture under the different test conditions of test temperature and loading frequency. The change law of gynamic modulus and phase angle for the two mixtures was analyzed.Using the Sigmoidal model, the shift factor of dynamic modulus and model parameters were gained according to the data. The master curves of dynamic modulus and phase angle of asphalt mixture are obtained and analyzed comparatively. The results indicate that the activation energy (ΔEa) and the absolute value of shift factor (log[α(T)]) of CBMAM are smaller than those of base asphalt mixture respectively at the temperatures lower than the reference temperature, while they are contrary at the temperatures higher than the reference temperature. The master curve of dynamic modulus goes up like "S" curve continuously with an increase in loading frequency. Phase angles of asphalt mixtures go up firstly and then drop with the increase in frequency. But the master curves of phase angle are not as smooth as those of dynamic modulus especially at high temperatures.The dynamic modulus master curve and shift factor can reflect the effect of loading frequency and temperature on the visco-elastic response of CBMAM. The dynamic modulus of CBMAM is bigger at temperatures lower than 37.8℃, which has better resistance to deformation. When the temperature increases higher than 37.8℃, there is no significant difference in the dynamic response of the two mixtures, the modification effect of carbon black for asphalt mixture is no very significant under the conditions of low frequency and high temperature.
%U http://gxb.zzu.edu.cn/oa/darticle.aspx?type=view&id=201607058