臺灣位處亞熱帶地區四面環海氣候高溫多雨，同時為提供用路人舒適的行車環境，高速公路鋪面主要使用瀝青混凝土進行鋪設，當水分經由瀝青混凝土鋪面表面滲入鋪面孔隙，於交通荷重反覆作用下容易產生坑洞破壞，若未即時進行修補坑洞將持續擴大，進而影響用路人行車安全及降低行車舒適性。本研究收集國內通路取得之四種常溫瀝青混凝土材料，並對其進行實驗室品質檢驗及成效試驗與高速公路現地試驗，來瞭解常溫瀝青混凝土之成效及品質。實驗室試驗部分，本研究以日本道路協會鋪裝調查試驗法遍覽所規定之方式製作馬歇爾試體，並以穩定值試驗、間接張力試驗、飛散試驗及動穩定值試驗等進行評估，試驗結果皆經變異數分析進行檢定；高速公路現地試驗則於國道三號南下74至75公里處進行試驗，使用道路清掃車營造強降雨之地表逕流模擬雨天之潮濕修補及晴天狀態的乾燥修補，並協同交通部高速公路局北區養護工程分局轄下之事故處理小組，於平時進行之緊急修補作業嘗試運用試驗中所選用之四種常溫瀝青混凝土材料進行試驗並追蹤；並將實驗室試驗及現地追蹤結果進一步比對分析，瞭解常溫瀝青混凝土應用於高速公路坑洞緊急修補作業之適用性。後續並針對材料部份進行建議於雨天使用開放級配配置之常溫瀝青混凝土，同時在實驗室及現地試驗結果中得知可選用成效更佳之材料，惟須衡量所要求成效及成本間之關係；施工方法部分則建議維持傳統修補工法進行，避免工時過長影響交通；成本部分建議於現行狀態下新增一材料應用於晴天之乾燥修補以達到更佳的經濟效益。;Taiwan is a subtropical island state surrounded by sea and the climate is hot and rainy. To provide a comfortable driving environment for drivers, the freeway pavement is mainly paved with asphalt concrete. When moisture penetrates through the pavements, it is easy to produce pothole under the repeated action of traffic load. If the pothole isn’t repaired immediately, it would continually to expand. In that case, the safety of road users would be affected and driving comfort would reduce as well. This research collects four kinds of cold-mix asphalt materials. In order to understand the effectiveness and quality of them, we conducted laboratory quality inspection. Including effectiveness and freeway field tests. In the laboratory test part, this study used the method prescribed by the Japan Road Association “Pavement Survey and Test Method” to make Marshall specimens. Evaluation by stability test, indirect tension test, Cantabro test, Dynamic Stability etc. All result is verified by analysis of variance. The field test of the freeway is carried out at the mileage of 74 to 75 kilometer downbound Freeway No. 3. The pavement sweeper was used to create surface runoff for the purposes of simulating wet repair environment during rainy days and dry repair in sunny conditions. With the cooperation of the Northern Region Branch Office of the Freeway Bureau, MOTC, The cold-mix asphalt was tried to be used in emergency repair operations to test and track in usual. Later, the results of the laboratory and field tests are compared and analyzed to understand the applicability of cold-mix asphalt for emergency repair of freeway potholes. Finally, it is recommended to use open-graded cold-mix asphalt in rainy days. The construction analysis recommended to maintain the traditional repair method to avoid excessive working hours to interfere the traffic. As for the cost analysis, a new material is suggested to be add into repairing policy and during sunny days to achieve better economic benefits.
