融雪剂融冰能力及其对沥青混合料抗剥落性能的影响（英文）

Ice melting performance of deicers and their effect on stripping resistance of asphalt mixture

选取氯化钠、氯化钙和醋酸钠3种融雪剂,通过室内融冰试验测试融雪剂的融冰性能,并从抗剥落性能的角度评价融雪剂对沥青混合料的破坏.试验中将未饱水马歇尔试件浸入不同浓度的融雪剂溶液中进行冻融循环,冻融循环结束后进行肯塔堡飞散试验,以飞散损失作为沥青混合料抗剥落性能的评价指标.试验结果表明:氯化钙的综合融冰性能最强,冻融循环过程中3种融雪剂均对沥青混合料造成不同程度的抗剥落性能损失,其破坏程度与融雪剂的种类和溶液浓度有关.融雪剂溶液的质量分数为2%左右时,破坏最为严重,沥青混合料的抗剥落性能损失最大;在质量分数相同的条件下,醋酸钠引起的抗剥落性能损失大于氯化钠和氯化钙.

The ice melting performance of three types of deicers, including sodium chloride, calcium chloride and sodium acetate, were tested in laboratory under different temperature conditions, and their effects on asphalt mixture were evaluated from the point of the stripping resistance of asphalt mixture. Unsaturated Marshall samples were exposed to freeze-thaw cycling while immersed in the deicer solutions of different concentrations. After the freeze-thaw cycles, Cantabro tests were performed, and Cantabro loss was adopted to characterize the stripping resistance of asphalt mixture. The test results show that calcium chloride has the best comprehensive ice melting performance, and all deicers have detrimental effect on the stripping resistance of asphalt mixture at different degrees. The damage degree depends on deicer types and their concentration in the solution. Deicer solutions with about 2% concentration cause the greatest loss of stripping resistance due to serious freeze-thaw damage. Sodium acetate causes greater loss of stripping resistance than sodium chloride and calcium chloride at the same concentration.