龙源期刊网 添加Sasobit温拌沥青混合料的拌和与压实温度确定
作者：吴超凡,曾梦澜,王茂文,夏漾
来源：《湖南大学学报·自然科学版》2010年第08期
摘要:通过实验室沥青粘度试验与混合料击实试验,探讨添加Sasobit温拌沥青混合料拌和与压实温度的合理确定方法。

试验结果与结果分析显示,传统沥青等粘度原则方法远远低估了Sasobit的降温效果,不适用于添加Sasobit的沥青混合料。

提出了混合料等体积原则确定沥青混合料压实温度中值的方法,同时适用于净沥青混合料与Sasobit沥青混合料。

对于净沥青混合料,混合料等体积原则方法与沥青等粘度原则方法确定的压实温度实际相同;对于Sasobit沥青混合料,混合料等体积原则方法确定的压实温度与厂商的建议与迄今的实践一致。

鉴于导致Sasobit 沥青表观粘度与实际流动性差异的因素对相对值的影响有限,建议了合理假定,分别确定Sasobit 混合料压实温度的上下限以及混合料拌和温度上下限。

关键词:道路工程;温拌沥青混合料;Sasobit;拌和与压实温度;等体积原则
中图分类号:U416.217 文献标识码:A
Determination of Mixing and Compaction Temperatures for Warm Mix Asphalt with Sasobit
WU Chaofan1,2, ZENG Menglan2, WANG Maowen3, XIA Yang2
(1. College of Civil Engineering, Hunan University, Changsha, Hunan, China, 410082; 2. Hunan Institute of Transportation, Changsha, Hunan, China 410015; 3. Hunan Chang-Ji Expressway Construction and Development Co., Ltd, Changde, Hunan, China, 415000)
Abstract: Asphalt binder viscosity tests and mixture compaction tests were conducted to explore reasonable method for determining mixing and compaction temperatures of warm mix asphalt (WMA) with Sasobit additive. Test results and result analyses indicate that traditional binder equiviscous principle is not applicable to Sasobit mixture due to significant underestimation of temperature-decreasing effect of the additive. A mixture equivolumetric principle is proposed, which is applicable to both neat binder and Sasobit mixtures to determine the compaction temperature. For neat binder。