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为对常用除冰盐进行优选,并对除冰盐的种类和用量进行推荐,对不同浓度下NaCl、CaCl_2以及MgCl_2这3种常用除冰盐溶液的冰点进行了测定,并对其除冰效果进行了评价;采用3种盐溶液对沥青混合料进行了盐冻循环试验,测定了盐冻循环前后沥青混合料的劈裂强度和抗剪强度,并以此为指标对3种除冰盐对沥青混合料性能的影响情况进行了评价;依据3种除冰盐对水冰点的降低情况,提出了不同地区的除冰盐用量选择方法。结果表明:3种除冰盐对沥青路面均有不利影响,且MgCl_2影响最大,CaCl_2次之,NaCl最小;提出了各地区的除冰盐撒布量公式。
In order to optimize the commonly used deicing salt and to recommend the type and dosage of deicing salt, the freezing point of NaCl, CaCl 2 and MgCl 2 at different densities were measured and the deicing effect The salt solution freeze-thaw cycles of three kinds of salt solution were used to measure the splitting strength and shear strength of asphalt mixture before and after salt-frost cycle. Asphalt mixture properties of the situation were evaluated; based on the three kinds of deicing salt water ice point reduction, put forward in different regions of the amount of deicing salt selection method. The results show that all the three kinds of deicing salt have adverse effects on asphalt pavement, and MgCl 2 has the greatest effect, followed by CaCl_2, and has the smallest NaCl. The formula of deicing salt spreading amount is put forward.