春风-塔河调合沥青微观结构关键信息解析

ANALYSIS OF KEY INFORMATION ON MICROSTRUCTURE OF CHUNFENG-TAHE BLENDED ASPHALT

在客观评价春风-塔河调合沥青兼备高温性能、低温性能良好品质的基础上,通过红外光谱(FTIR)、凝胶渗透色谱(GPC)及核磁共振氢谱(1H-NMR)等分析表征手段,深入探讨春风减压渣油(减渣)、塔河减渣调制春风-塔河沥青产品过程中物系微观结构参数、结构形态变化,探索春风-塔河沥青表现出的良好高、低温路用性能的内在微观结构原因。结果表明:春风减渣具有较长的脂肪链和较发达的支链,可以促进塔河减渣低温性能的改良,使调合沥青一定程度保留、保持了春风减渣优异的低温松驰流动性能;另一方面,塔河减渣通过其迫位缩合为主、缈位缩合为辅的芳环结构状态对春风减渣的相应组分进行诱导吸附,使调合沥青最终基本保留了塔河减渣高缩合度稠环香烃化合物特征及其沥青材料的高温稳定性特点。调合沥青通过对两种初始减渣优良性能的保留,使之拥有了高、低温性能兼备的良好质量特征。

Based on the evaluation of Chunfeng-Tahe blended asphalt with both high temperature performance and low temperature performance,the asphalt was characterized by FTIR,GPC and ^(1)H-NMR,and the internal microstructural reasons of high and low temperature performance of the blended asphalt with Chunfeng vacuum residue(VR)and Tahe VR were explored.The results showed that Chunfeng VR has longer aliphatic chain and more developed branch chain,which can improve the low-temperature performance of Tahe VR,and make the blended asphalt retain the excellent low-temperature relaxation flow performance of Chunfeng VR.On the other hand,Tahe VR induces the adsorption of corresponding components of Chunfeng VR through its planar arrangement of aromatic ring structure,which makes the blended asphalt retain the characteristics of Tahe VR’s highly condensed polycyclic aromatic hydrocarbon compounds and the high-temperature stability of the asphalt materials.By retaining the excellent performance of the initial two VRs,the blended asphalt possesses the good quality characteristics of both high and low temperature performance.