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进行了热风除冰、乙二醇化学除冰与尿素化学除冰的模拟试验,测试了混凝土试件质量损失和强度降低率,分析了除冰方式与除冰次数对水泥混凝土道面的损伤规律。分析结果表明:热风除冰对试件表层损伤反应较慢,在经过45次冻融循环后才表现出明显的质量损失,但其对试件内部结构损伤却较严重,50次热风除冰后的强度降低超过35%。虽然50次化学除冰后试件的强度降低小于20%,但试件表层的腐蚀性损伤造成的质量损失较显著,尿素的腐蚀所造成的质量损失高达8.5%,比热风除冰的质量损失高5倍以上。可见,为了保持机场道面结构强度,化学除冰要比热风除冰更为合理。为了降低机场跑道混凝土剥落对飞机发动机损害的隐患,宜优先采用热风除冰方式,但须关注其对道面结构强度的影响。
The simulation tests of hot air deicing, glycol chemical de-icing and urea chemical de-icing were carried out. The mass loss and strength reduction of concrete specimens were tested. The damage rules of concrete pavement with de-icing methods and deicing times . The results show that hot air deicing has a slow response to surface damage and shows obvious mass loss after 45 cycles of freezing and thawing. However, the damage to the internal structure of the specimen is more serious. After 50 hot air deicing cycles The intensity is reduced by more than 35%. Although the strength of the specimens after 50 chemical de-icing was reduced by less than 20%, the mass loss caused by the corrosive damage on the surface of the specimens was significant. The mass loss due to urea corrosion was as high as 8.5%, which was lower than that of the hot-air de-icing 5 times more high. Visible, in order to maintain the strength of the airport pavement structure, chemical deicing is more reasonable than hot air deicing. In order to reduce the risk of damage to the aircraft engine caused by concrete spalling at the airport runway, hot air deicing methods should be prioritized, but the effect on the structural strength of the pavement should be concerned.