为研究钠基蒙脱土对沥青技术性能的影响,采用熔融插层法制备了钠基蒙脱土改性沥青,利用XRD分析了钠基蒙脱土改性沥青的微观结构,并通过室内试验测试了钠基蒙脱土改性沥青的针入度、软化点和延度。结果表明:钠基蒙脱土扩大了层间距,形成了插层型纳米复合结构;钠基蒙脱土提高了沥青的黏度和高温性能,改善了沥青的感温性,但略降低沥青的低温性能;钠基蒙脱土的最佳掺量为4%左右。 In order to study the effect of sodium montmorillonite on asphalt technical performance, sodium montmorillonite modified asphalt was prepared by melt intercalation method. The microstructure of sodium montmorillonite modified asphalt was analyzed by XRD. Sodium montmorillonite modified asphalt penetration, softening point and ductility. The results show that the sodium montmorillonite expands the interlayer spacing and forms an intercalated nanocomposite structure. Sodium montmorillonite improves the viscosity and high temperature performance of asphalt, improves the temperature sensitivity of asphalt, but slightly reduces the low temperature of asphalt Performance; sodium montmorillonite best dosage is about 4%.