融冰雪沥青混合料盐分溶析试验

Efflorescence experiment of asphalt mixture with salt for melting snow and ice

为了评价掺加盐化物融冰雪材料路面的抑制冻结效果及影响因素,基于稀溶液定律,确定路面不同融冰雪效果的盐分析出目标值,利用盐溶液电导率值检测试验,研究了不同盐化物含量的压实沥青路面的盐分溶析规律以及不同温度和不同空隙率条件下的沥青路面盐分溶析变化情况。结果表明:通过调整沥青混合料的盐化物含量,可得到不同的冻结抑制效果,温度升高,盐分析出速度加快,夏季高温多雨是路面盐分散失的主要原因;盐分析出速度随路面空隙率的增加而加快,路面压实度的控制是保持抑制冻结效果持续性的关键因素。

In order to estimate the antifreezing effect and influencing factor of asphalt pavement with salt,this paper determinates the aim value of salinity different effect about melting snow based on the dilute solution law.By determining the conductivity of salt solution,this paper analyses the law of efflorescence along with variety of the salt content under different temperature and void ration.The results show that the antifreezing effect is different by adjusting the salt content of asphalt mixture,the temperature can accelerate the speed of efflorescence.In summer,the main reasons of salt disappearing are high temperature and rain.The speed of efflorescence increases with the raising of void ration.To strictly control the pavement compaction degree is the key for keeping antifreezing effect.4 tabs,6 figs,5 refs.