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特立尼达湖沥青(TLA沥青)是世界著名的天然沥青,技术性能指标非常稳定。对基质沥青和TLA改性沥青的常规性能和流变性能进行分析。采用动态剪切流变仪(DSR)进行温度扫描和频率扫描试验,以评价沥青胶结料的流变性能;采用蠕变试验评价其抵抗变形的恢复能力。试验结果表明,TLA改性沥青较基质沥青有更好的高温性能,且TLA沥青掺量对沥青胶结料的性能有重要影响。
Trinidad Lake Bitumen (TLA bitumen) is a world famous natural pitch with very stable technical performance. The conventional properties and rheological properties of matrix asphalt and TLA modified asphalt were analyzed. Dynamic shear rheometer (DSR) was used to conduct temperature sweep and frequency sweep test to evaluate the rheological properties of asphalt cement. The creep test was used to evaluate the resilience to deformation. The experimental results show that the TLA modified asphalt has better high temperature performance than the matrix asphalt, and the TLA asphalt content has an important influence on the performance of the asphalt binder.