在温拌沥青混合料拌合过程中添加相变调温材料(DTC)制备了DTC道路相变沥青混合料。通过融雪实验研究了不同降雪强度、不同积雪压实度条件下DTC道路相变沥青混合料的融雪性能;通过冰路粘结力实验研究其对雪水冻结冰层的融化效果。结果表明:降温阶段,随着降雪强度、积雪密度的增加,压实与未压实状态下DTC道路相变沥青混合料融雪能力均呈下降趋势,且DTC掺量越高,相变沥青混合料融雪能力下降程度越大;压实积雪条件下DTC相变沥青混合料融雪能力均低于未压实条件,且与未压实条件相比,融雪能力随降雪强度以及积雪密度的增加降低程度逐渐减小;升温阶段,相变沥青混合料融雪能力随DTC掺量增加而降低,且在压实与未压实条件下,降雪强度变化对相变沥青混合料融雪能力影响不大;DTC道路相变沥青混合料在降温时能够有效减少路面与冰层之间的粘结力。
During the mixing process of warm mixed asphalt mixture,phase change temperature regulating material (DTC) was added to prepare DTC road phase change asphalt mixture.The snow melting performance of DTC phase change asphalt mixture under different snowfall intensity and different snow compaction degree was studied through snow melting experiments.Their melting effect on frozen ice layer was investigated through the experiment of ice road adhesion experiments.The results showed that,in the cooling stage,with the increase of snowfall intensity and snow density,the snow melting ability of DTC road phase change asphalt mixture under the compacted and uncompacted conditions decreased,and the higher the DTC content,the greater the decrease of the snow melting ability of phase change asphalt mixture.Under the condition of compacted snow,the snow melting ability of DTC road phase change asphalt mixture was lower than that under the condition of uncompacted,and compared with the condition of uncompacted,the snow melting ability decreased gradually in the degree of reduction with the increase of snowfall intensity and snow density.In the heating stage,the snow melting ability of phase change asphalt mixture decreased with the increase of DTC content,and the change of snowfall intensity had little effect on the snow melting ability of phase change asphalt mixture under the conditions of compaction and uncompacted.DTC road phase change asphalt mixture could effectively reduce the adhesion between pavement and ice layer during cooling.
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基金资助
内蒙古自治区直属高校基本科研业务费项目(JY20220414);内蒙古自治区自然科学基金(2023LHMS05036)
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