研究生: |
張皓為 HAO-WEI CHANG |
---|---|
論文名稱: |
高勁度瀝青混凝土之設計與績效評估 Design and Performance Evaluation of High Stiffness Asphalt Concrete |
指導教授: |
廖敏志
Min-Chih Liao |
口試委員: |
黃兆龍
Chao-Lung Hwang 陳建旭 Jian-Shinh Chen 蘇育民 Yu-Min Su |
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: | 2018 |
畢業學年度: | 106 |
語文別: | 中文 |
論文頁數: | 111 |
中文關鍵詞: | 高勁度瀝青混凝土 、績效試驗 、車轍試驗 、績效設計 |
外文關鍵詞: | igh Stiffness Asphalt Concrete |
相關次數: | 點閱:176 下載:0 |
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近年來台灣交通量遽增,早期車轍破壞現象頻繁產生。目前台灣的瀝青混凝土設計方法,仍採用馬歇爾配比設計來決定各組成材料之使用量,然而,材料設計的成果無法反映鋪面績效。研究以高勁度混凝土為研究材料,比較高勁度瀝青混凝土與一般瀝青混凝土之性能差異,並發展績效試驗使瀝青混凝土更能反映鋪面實際真實受載重情況,本研究內容包括粒料及瀝青黏結料之基本物理性質、浸水耐久性、抗車轍之永久變形能力、多重載重車轍輪跡試驗之疲勞行為,根據傳統力學試驗、勁度績效預測、車轍績效試驗及耐久性試驗等數據,試驗結果顯示,績效配比設計規範上須採用材料體積參數性質要求,以確認瀝青混凝土之正確組成比例;可依路面交通量變化從選擇豐度係數K,來設計瀝青混凝土之瀝青含量,豐度係數K在2.5~3.2之間。從馬歇爾穩定值及間接張力試驗試驗中得出高勁度瀝青凝土之抗變形能力及抗變形強度皆會優於一般瀝青混凝土;以抗車轍能力及瀝青勁度模數來看,高勁度瀝青瀝青混凝土高於一般瀝青混凝土,並以勁度模數14,000MPa作為勁度模數的指標;從水侵害間接張力試驗中得知,抗水侵害能力之排行依序為改質Ⅲ型瀝青混凝土、針入度20/40瀝青混凝土、針入度60/70瀝青混凝土,最後為高黏度瀝青混凝土;疲勞性質則以高黏度瀝青混凝土有最佳之抗疲勞能力,再依序為改質Ⅲ型瀝青混凝土、針入度20/40瀝青混凝土及針入度60/70瀝青混凝土。此外,使用Burger 模型可預測瀝青混凝土車轍變形量,及12.5mm時載重次數,並建議1,000,000次反覆載重後之單位車轍變形量不高於1。
The conventional dense graded asphalt concrete with a penetration grade 60/70 could not be capable of carrying heavily traffic loads, while another built environmental issue related to polymer modified asphalt is the difficulty with the recycling work in the future. A suitable binder course material is high stiffness asphalt concrete. The idea of high stiffness asphalt concrete was to design a mix with hard penetration grade asphalt. The hard grade of the asphalt conferred a higher modulus to the mix which allowed, with equal thickness, to reduce the stresses transmitted to the subgrade. In addition, the asphalt material proportion was designed in terms of the pavement performance-related requirements. The objective of this study was to investigate the rheological properties of hard penetration grade asphalt, and to assess the performance characteristics of the high stiffness as well as conventional asphalt concrete. The results showed that the optimum asphalt content of the asphalt concrete was determined based on the richness modulus (K). The performance characteristics of the stability, indirect tensile strength and permanent deformation for the asphalt concrete could be well interpreted by means of the DSR master curves over a wide range of the temperatures. With regard to the wheel track testing, the polymer modified asphalt mixtures had better resistance to rutting compared to the asphalt concrete with the penetration grade 20/40 asphalt in terms of the proportional rut depth. In addition, The Burgers model satisfactorily explained the mixture rutting behavior. The results clearly demonstrated that rutting resistance was improved with increasing the binder viscosity.
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