硅烷偶联剂改性蒙脱土/SBS/HVA高黏改性沥青最佳掺量确定及其性能评价

›› 2024, Vol. 38 ›› Issue (3): 18-25.

硅烷偶联剂改性蒙脱土/SBS/HVA高黏改性沥青最佳掺量确定及其性能评价

孙吉书¹,濮夏天¹,杨凯²,靳灿章²

1. 河北工业大学
2. 天津市政工程设计研究总院

收稿日期:2023-08-30 修回日期:2023-09-13 出版日期:2024-03-26 发布日期:2024-03-26
基金资助:
天津市自然科学基金资助项目

Determination of optimum dosage of high-viscosity-modified asphalt based on silane-coupling-agent-modified montmorillonite/SBS/HVA blends and its performanceDetermination of optimum dosage of high-viscosity-modified asphalt based on silane-coupling-agent-modified montmorillonite/SBS/HVA blends and its performance

Received:2023-08-30 Revised:2023-09-13 Online:2024-03-26 Published:2024-03-26

摘要/Abstract

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。

关键词: 改性沥青, 响应面法, 硅烷偶联剂, 改性蒙脱土

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.

Key words: modified bitumen, box-behnken, silane coupling agent, modified montmorillonite

孙吉书濮夏天杨凯靳灿章. 硅烷偶联剂改性蒙脱土/SBS/HVA高黏改性沥青最佳掺量确定及其性能评价[J]. , 2024, 38(3): 18-25.

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