Study on the compatibility of high viscosity modifier and asphalt based on bonding properties
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 tenac-ity of asphalt and aggregate.In this paper,we conducted a compatibility test on two high-viscosity modifiers and three different as-phalts,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 eval-uation 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 15N·m,and tenacity should be at least 10N·m.
万方数据
维普
