便于施工检验的抗水损害试验指标研究

Study on water damage test index for construction stage

为了快速检验沥青混合料的抗水损害能力,设计了便于施工检验沥青混合料水稳定性的试验指标.新方法根据沥青混合料遵循时间—温度—应力等效原理,在分析沥青混合料的马歇尔稳定度和劈裂强度的温度函数变化规律的基础上,确定以80℃与60℃马歇尔稳定度比评价沥青混合料抗水损害能力.并且通过与AASHTOT-283试验的对比试验,验证了新试验方法的评价效果.

For rapidly evaluating asphalt mixture water stability,a new test index was designed which could evaluate water stability of asphalt mixture in construction stage easily.It is according to time-temperature-stress equivalent principle followed by asphalt mixtures and based on analysis of temperature functions of Marshall stability and splitting strength.The new test evaluates water stability of mixtures by ratio of 80℃ Marshall stability to 60 ℃ Marshall stability.It was verified by contrast test of AASHTO T...