【摘要】 通过（Box-Behnken）响应面法，以硅烷偶联剂改性过的蒙脱土、苯乙烯-丁二烯-苯乙烯（SBS）和高黏剂（HVA）各自的掺量作为影响因素，以沥青3大指标、170℃布氏黏度为评价标准建立模型，确定3种材料在沥青中的最佳掺量。结果表明，5%SBS、9%HVA和8%的改性蒙脱土复配高黏改性沥青性能最好，其针入度、延度、软化点、170℃布氏黏度分别为4.52 mm、42.9 cm、86.1℃、2.371 Pa·s；相比于基质沥青和TPS高黏改性沥青，改性蒙脱土的加入大幅提高了沥青的高温性能与抗车辙能力，沥青黏度有着显著提升；振动峰的消失表明硅烷偶联剂对蒙脱土改性有化学反应。更多还原

【Abstract】 Using the Box-Behnken’s response surface method and taking the dosages of silane-coupling-agent-modified montmorillonite, SBS, and high viscosity agent(HVA) as influence factors for asphalt, a model was established to determine the optimal dosages of three types of raw materials in the asphalt based on the Brinell viscosity at 170 ℃ as an evaluation criterion. The results indicated that the high-viscosity-modified asphalt containing 5 wt% SBS, 9 wt% HVA, and 8 wt% modified montmorillonite exhibited the best performance, and its penetration, ductility, softening point, and Brinell’s viscosity at 170 ℃ were determined to be 4. 52 mm, 42. 9 cm, 86. 1 ℃, and 2. 371 Pa·s, respectively. Dynamic shear and Brinell’s viscosity tests show that, compared to the pristine asphalt and the high-viscosity-modified asphalt TPS, the addition of modified montmorillonite greatly improved the high-temperature performance and rutting resistance of asphalt, resulting in a significant improvement in the viscosity. The functional groups were analyzed by Fourier-transmission infrared spectroscopy. The disappearance of the vibration peaks indicated that the silane coupling agent involved a chemical reaction with montmorillonite in the modification process.更多还原