超疏水沥青混凝土抗凝冰性能及评价

引入超疏水设计理念,制备了具有超疏水抗凝冰性能的沥青混凝土试件。通过模拟试验和理论分析相结合,开展了超疏水沥青混凝土抗凝冰性能研究,测定了普通试件及超疏水试件抗凝冰性能差异,分析了不同工况下超疏水沥青混凝土试件的抗凝冰性能。通过接触角测定及表面能计算,评价了超疏水沥青混凝土的防冰、疏冰性能。结果表明,超疏水沥青混凝土可有效促进液滴滚落,滚落率高达80%。通过自行设计的落锤冲击试验间接测定了超疏水沥青混凝土试件的"冰-路"附着力,仅为普通沥青混凝土试件的38.5%。基于不同工况,降雪环境下超疏水沥青混凝土试件冰的残留率最低。接触角试验和表面能计算表明,超疏水沥青混凝土的表面能为1.97mJ/m2,仅为普通沥青混凝土的5.1%,体现了良好的抗凝冰性能。

Performance and Evaluation of Anti-icing Super-hydrophobic Asphalt Concrete

Asphalt concrete specimens with super hydrophobicity and ice resistance were made through introducing the principle of super hydrophobicity. The difference of anti-icing performance of common specimens and super hydrophobic specimens, the difference of anti-icing performance of super hydrophobic asphalt concrete under different environments were tested by simulation test and theoretical analysis. Anti-icing performance of super hydrophobic asphalt concrete was evaluated by contact angle and surface energy. The results showed that super-hydrophobic asphalt concrete could promote the drop of water, the dropping rate could reach 80%. The adhesion between ice and road surface was measured indirectly by self-designed impact test, and the adhesion was 38.5% of the ordinary specimen. The residual rate of ice on the specimen was the least in snowy conditions. The surface energy of super hydrophobic asphalt concrete was 1.97 mJ/m², which was measured by the measurement of contact angle and the calculation of surface energy, it was only 5.1% of ordinary asphalt concrete and showed a good anti-icing performance.