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| 研究生： |
蘇育仟 YU-CHIEN SU |
|---|---|
| 論文名稱： |
瀝青混凝土之抗裂-車轍平衡績效評估 Balancing Cracking-Rutting Performance for Asphalt Mixtures |
| 指導教授： |
陳沛清
Pei-Ching Chen 廖敏志 Min-Chih Liao |
| 口試委員: |
陳建旭
蘇育民 林彥宇 |
| 學位類別： |
碩士 Master |
| 系所名稱： |
工程學院 - 營建工程系 Department of Civil and Construction Engineering |
| 論文出版年： | 2023 |
| 畢業學年度： | 111 |
| 語文別： | 中文 |
| 論文頁數： | 105 |
| 中文關鍵詞： | 疲勞 、車轍 、勁度折減50%分析法 、SxN 峰值分析法 、耗散能量變化率(RDEC) 、Francken Model |
| 外文關鍵詞： | Fatigue, Rutting, Stiffness Reduction 50% Analysis, SxN Peak Analysis, Ratio of Dissipated Energy Change (RDEC), Francken Model |
| 相關次數： | 點閱：144 下載：2 |
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公路為現今交通運輸不可或缺的基礎建設，路面長期受到車輛反覆加載造成路面變形及開裂，產生微裂縫後逐漸成長形成巨觀裂縫，加上臺灣為多雨的氣候，水從裂縫進入造成瀝青混凝土結構破壞，導致路面服務年限下降，因此路面的抗裂與抗變形為重要的課題之一，然而，許多研究顯示路面的抗裂與抗變形之設計互有牽制之作用，為使路面能達到多方面性能，導入平衡設計法觀念同時提高瀝青混凝土耐久性和穩定性。本研究使用不同的標稱最大粒徑(分別為19mm與25mm)及不同的瀝青膠泥類型(分別為AC-10與AC-20)，探討四組配比設計在最佳瀝青含量時是否有達到平衡設計之績效，採用之績效試驗為四點彎曲試驗(Four Point Bending Test, 4PBT)和漢堡輪跡試驗(Hamburg Wheel-Tracking Test，HWTT)，4PBT為模擬在實際交通量反覆加載之疲勞破壞，HWTT為抵抗車轍的能力及水侵害的敏感性。本研究採用勁度折減50%分析法、SxN 峰值分析法與耗散能量變化率(Ratio of Dissipated Energy Change, RDEC)進行分析與探討，在三種分析法有不同之結果，其中RDEC 法定義之疲勞壽命較佳，而勁度折減50%分析法相較於其他兩種方法定義之疲勞壽命較保守，亦驗證可能不適用於定義瀝青混凝土之疲勞壽命。本研究探討車轍曲線並以Francken Model 擬合，藉由MATLAB 可以得出Francken Model 之四個迴歸係數A、B、C 與D，結果顯示AC-20 瀝青膠泥較AC-10 適合用於抵抗車轍變形。將4PBT 與HWTT 之試驗結果結合以平衡設計觀念分析，其中標稱最大粒徑為25mm 且瀝青膠泥為AC-20具最佳平衡績效。
Nowadays, asphalt pavement has played an important role in transportation infrastructure, but it issubjected to long-term repeated loading by vehicles, resulting in two primary distress modes of rutting and cracking. Balancing crack and deformation resistance of the pavement is one of the important issues at the mix design stage. The concept of balanced design method has recently been introduced in order to improve the durability and stability of asphalt concrete. The variables investigated in this study include nominal maximum aggregate size (19mm and 25mm) and asphalt grade (AC-10 and AC-20). The performance was evaluated by conducting Four Point Bending Test (4PBT) and Hamburg Wheel-Tracking Test (HWTT) on asphalt mixtures. 4PBT was used to simulate the fatigue failure of pavement by repeated loading. HWTT was adopted to assessed the resistance to rutting and moisture susceptibility. In addition, the 50% stiffness reduction method, SxN peak analysis method and the Ratio of Dissipated Energy Change (RDEC) were utilized for the definition of fatigue failure. The 50% stiffness reduction method was found to be more conservative than the other two methods in order to determine the fatigue life. Regarding the rutting performance, the HWTT experimental curves can be fitted with the Francken Model. The four regression coefficients A, B, C and D of the Model were obtained by means of MATLAB. The results show that the use of AC-20 asphalt for producing asphalt concretes hows better rutting resistance compared to the use of AC-10. In terms of 4PBT and HWTT results to analyze the balanced design concept, the nominal maximum aggregate size of 25mm together withAC-20 asphalt possesses the best balanced performance.
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