宁高高速公路泛油原因分析研究

Study of Causes for Ning-Gao Freeway Bleeding

研究了引起宁高高速公路沥青路面泛油病害的原因,结果表明:高温多雨的气候条件,夏季路面温度持续较高是泛油产生的外因,另外混合料公称最大粒径与路面厚度不匹配、混合料粉尘含量偏高、粉胶比偏大、沥青存在由下面层到上面层的迁移、混合料级配设计的不合理也是泛油产生的主要原因。

The paper studies causes for asphalt pavement bleeding on Ning - Gao Freeway. Resultes studied indicate that under high - temp and rainy conditions,in the summer, the sustained high temp of pavement in an ex ternal cause for bleeding, in addition the mismatching of nominal maximum grain size with pavement thickness, mixture powder content and powder adhesive ratio are all over normal value, dislodgement of asphalt from lover surface to upper surface as well as irrational design of mixture grading are major causes for bleeding too.