温拌剂对高黏沥青物理性质及流变行为的影响机制研究
Study on the Impacts Mechanism of Warm-mix Agent on Physical Properties and Rheological Behavior of High Viscosity Asphalt
赖明信1
作者信息
- 1. 福建第一公路工程集团有限公司,福建泉州 362000
- 折叠
摘要
为研究不同温拌剂对高黏沥青性能的影响,选用了 3种常见的温拌剂:有机降黏剂Sasobit、表面活性剂Evotherm及稀释型降黏剂废弃食用油(WCO),制备了相应的温拌高黏沥青,并对其物理性能、黏度及流变特性进行了对比分析.研究结果表明:Sasobit和WCO能够显著降低高黏沥青的旋转黏度,而Evotherm的降黏效果相对较弱.同时,Sasobit的掺入使沥青发生硬化(针入度降低、复数模量增大),改善了高黏沥青的抗疲劳性能和高温性能,但对低温性能产生了不利影响;WCO则对高黏沥青的高温性能产生了不利影响,降低了极限最大剪切应力,但显著提升了低温抗裂性:Evotherm对高黏沥青的高低温性能影响较小.
Abstract
In order to investigate the effects of different warm-mix agent on the performance of high viscosity asphalt(HVA),three commonly used warm-mix agents of the organic viscosity reducer Sasobit,the surfactant Evotherm,and the diluent viscosity reducer of waste cooking oil(WCO)were selected to prepare corresponding warm-mix HVA,and comparatively analyze the physical properties,viscosity and rheological characteristics.The results indicate that Sasobit and WCO significantly reduce the rotational viscosity of HVA,whereas the viscosity-reducing effect of Evotherm is relatively weaker.The addition of Sasobit hardens the asphalt(penetration decreased and complex mod-ulus increased),improves the fatigue resistance and high temperature performance of HVA,but adversely affects low temperature performance;WCO negatively impacts high temperature performance by reducing the maximum shear stress,but notably enhances low temperature crack resistance;Evotherm has lower impact on the high and low temperature properties of HVA.
关键词
高黏沥青/温拌剂/低温性能/高温性能/黏度Key words
high viscosity asphalt(HVA)/warm-mix agent/low temperature performance/high temperature per-formance/viscosity引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
万方数据