沥青软化点检测结果的影响因素研究.pdfVIP

学兔兔 全国中文核心期刊 新鲤 蟓 中国科技核心期刊 沥青软化点检测结果的影嫡因素研究 金长泰，才洪美，刘洋，梅顺平 (江苏检验检疫沥青检测实验室，江苏 泰州 225300) 摘要：同一沥青样品在不同实验室所测试的软化点常存在差异，除人为因素外，所用仪器不同是引起差异的主要原因 为了明 确检测仪器对沥青软化点的影响，试验考察支撑板形状及高度、搅拌作用、试样环结构等对沥青软化点的影响。结果表明，大椭圆形 的支撑板导致沥青的软化点较小长方形的偏高1．2℃，而不同支撑板的下落高度差对软化点的影响较小，可以忽略不计。搅拌作用 对沥青的软化点也有一定程度的影响，且根据下支撑板的形状不同，对软化点的影响不同，幅度在O．3℃左右 并且搅拌作用可以增 强支撑板对软化点的影响。试样环为肩环时测试的沥青软化点较斜环的偏高O．5℃。 关键词：沥青；软化点；测试仪器；误差 中图分类号： rU57 ．1 文献标识码：A 文章编号：1001—702X(2011)l0—0079—03 Study on the effects of the softening point of bitumen JlN Changtai，CAI Hongmei，LIU Yang，MEI Shunping (Jiangsu Asphalt Testing Laboratory of CIQ，Taizhou 225300，Jiangsu，China) Abstract：Differences alw~s occur in the softening point testing results when a sanle sample of bitumen is tested in different labs．Besides the factors from personnel，the using of different testing apparatus is the main cause of errors．In order to know the effects of instrument on softening point，the paper studied the effect of support plate shape and heisht，mixing and sample ring structure on the influence of softening point．The results showed that the softening point got from large oval support plate was about 1．2℃ higher than that got from small rectangular support plate．But the hei【sht of support plate had less affected on the softening point，even can be neglected．To a certain extent，mixing could affect the softening point，and according to the shape of the support plate，the influence of mixing on softening point was different，this was about 0．3 oC，and the mixing Can increase the influence of support plate on the softening point．In th