【摘要】：江西省潮濕山區(qū)較多,凝冰是主要災害性天氣之一,在每年的冬季出現(xiàn)頻率較高。冬季瀝青路面易形成凝冰從而導致其抗滑能力大幅度降低,既削弱了道路的通行能力,也容易產生惡性交通事故,嚴重時還會造成交通中斷,人們的生活和生產無法正常進行,甚至危害人民生命和財產的安全。鑒于上述情況,本文從總結國內外抗凝冰瀝青路面研究現(xiàn)狀入手,進行了抗凝冰瀝青混合料研究,目標是解決瀝青路面凝冰時的行車安全問題。通過室內試驗研究及理論分析,結合課題組自主研發(fā)的新型抗凝冰劑,解決了抗凝冰瀝青混合料的配合比設計和抗凝冰性能評價等問題,同時保證抗凝冰瀝青混合料的水穩(wěn)定性能、高溫性能、低溫性能等路用性能滿足規(guī)范要求。最后通過鋪筑試驗路,提出抗凝冰瀝青路面專用施工技術,對瀝青路面凝冰高發(fā)區(qū)域新建道路進行技術指導。通過研究主要得出以下結論:(1)結合路用性能試驗結果與室內模擬凝冰試驗結果,同時兼顧經(jīng)濟效益方面的考量,確定本文所設計的抗凝冰瀝青混合料中抗凝冰劑最佳摻量為5%,目標空隙率控制在2%~3%。(2)投料時需基礎混合料拌和均勻后再根據(jù)用量加入抗凝冰劑拌和5s~10s;施工時各環(huán)節(jié)對溫度的控制都比普通瀝青混合料高出5℃~10℃;由于細集料含量較多,碾壓過程中需增加復壓的次數(shù)。(3)通過試驗研究,認為本文所設計的抗凝冰瀝青混合料具備滿足規(guī)范要求的路用性能與優(yōu)異的抗凝冰效果。
[Abstract]:There are more wet mountain areas in Jiangxi Province, and freezing ice is one of the main disastrous weather, which occurs more frequently in winter every year. Bituminous pavement is easy to form ice in winter, which leads to a large reduction in its anti-skid capacity, which not only weakens the capacity of the road, but also easily produces malignant traffic accidents. When it is serious, it will also cause traffic disruption, and people's lives and production cannot be carried on normally. It even endangers the safety of people's lives and property. In view of the above situation, this paper starts with summarizing the present research situation of anti-freezing asphalt pavement at home and abroad, and carries on the research of anti-freezing asphalt mixture, the goal is to solve the traffic safety problem of asphalt pavement freezing. Through laboratory test and theoretical analysis, combined with the new anti-freezing agent independently developed by our research group, the problems of mix design and anti-freezing performance evaluation of anti-freezing asphalt mixture are solved. At the same time, the road performance such as water stability, high temperature performance and low temperature performance of anti-freezing asphalt mixture can meet the requirements of the specification. Finally, the paper puts forward the special construction technology of anti-freezing asphalt pavement through paving test road, and carries on the technical guidance to the newly built road in the area with high freezing rate of asphalt pavement. The main conclusions are as follows: (1) combining the test results of road performance with the results of simulated freezing test in the laboratory, and taking into account the consideration of economic benefits at the same time, The optimum content of anti-freezing agent in the anti-freezing asphalt mixture designed in this paper is 5%, and the target void ratio is controlled at 2% / 3%. (2) the mixture of the base mixture should be mixed evenly and then the anti-freezing agent is added into the mixture according to the dosage of the mixture. The temperature control of each link in construction is 5 鈩，

本文編號：2430584