摘要
现有黏韧性评估方法使用的金属拉头并不能真实反映沥青与集料的粘结能力,为此提出新的黏韧性评估方法,并以黏韧性、韧性为核心指标对2种高黏改性剂与3种沥青进行配伍性试验。结果表明:改性沥青与高黏改性剂M-9314和HVA的配伍性优于基质沥青,且最佳配伍沥青为I-D改性沥青。当高黏改性剂掺量相同时,改性沥青的黏韧性与高黏改性剂中SBS的含量无关,而与改性沥青中SBS的交联状态有关。同时,集料-沥青粘结评估方法的黏韧性与金属-沥青粘结评估方法的黏韧性存在较好的相关性,且集料-沥青粘结评估方法更接近实际情况,建议集料-沥青粘结评估方法的黏韧性指标为:黏韧性>15 N·m,韧性>10 N·m。
The current method of using a metal puller to evaluate the toughness and tenacity of asphalt and aggregate does not accurately reflect their bonding ability.To address this issue,we propose a new method for evaluating the toughness and tenacity of asphalt and aggregate.In this paper,we conducted a compatibility test on two high-viscosity modifiers and three different asphalts,using the toughness and tenacity as the core indicator.The results indicate that the compatibility between modified asphalt and high viscosity modifier M-9314 and HVA is better than that of base asphalt,and the optimal compatibility asphalt is I-D modified asphalt.The toughness and tenacity of the modified asphalt are not affected by the SBS content in the high-viscosity modifier when the dosage is consistent,but rather by the cross-linking state of SBS in the modified asphalt.Furthermore,the evaluation method for the aggregate-asphalt bonding,which considers toughness and tenacity,shows a strong correlation with the metal-asphalt bonding evaluation method,suggesting that the former provides a more accurate representation of the real situation.Based on these findings,we recommend using the aggregate-asphalt bonding evaluation method with the following indicators:toughness should be at least 15 N·m,and tenacity should be at least 10 N·m.
作者
马宏鹏
李款
潘友强
李思齐
张健
郁嘉栋
MA Hongpeng;LI Kuan;PAN Youqiang;LI Siqi;ZHANG Jian;YU Jiadong(SINOROAD Transportation Science and Technology Co.Ltd.,Nanjing 211800,China;Department of Civil Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《新型建筑材料》
2024年第3期76-81,103,共7页
New Building Materials
基金
国家重点研发计划项目(2021YFB1600301)
江苏省碳达峰碳中和科技创新项目(BA2023104)。
关键词
沥青
高黏改性剂
配伍性
黏韧性
韧性
拉伸粘结
asphalt
high viscosity modifier
compatibility
tenacity
toughness
tensile bonding
