| 研究生: |
楊允祺 Yang, Yun-Ci |
|---|---|
| 論文名稱: |
多孔性瀝青混凝土之工程性質 Engineering Properties of Porous Asphalt Concrete |
| 指導教授: |
陳建旭
Chen, Jian-Shiu |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年: | 2010 |
| 畢業學年度: | 98 |
| 語文別: | 中文 |
| 論文頁數: | 162 |
| 中文關鍵詞: | 多孔隙瀝青混凝土 、水侵害比 、消散潛變能限度 、潛變柔量 |
| 外文關鍵詞: | Porous Asphalt Concrete(PAC), Moisture Damage Ratio(MDR), Dissipated Creep Strain Energy Limit(DCSEf), Creep Compliance |
| 相關次數: | 點閱:114 下載:10 |
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多孔性瀝青混凝土(porous asphalt concrete, PAC)為由高比例的粗粒料所組成,使降於鋪面上的水可經由大量的孔隙迅速排除,避免於鋪面上形成水膜或逕流,可降低行車打滑與水花飛濺的現象,相對提升行車安全。PAC含15%以上的孔隙率,加上台灣特殊的氣候環境,使PAC有機會長期處於潮濕狀態。故本研究採用固定之PAC配比設計結果,配合三種不同瀝青黏結料:AR-8000、高黏度和改質III型瀝青,拌製PAC試體,並浸泡於60℃水中:0、1、3和7天。試體於浸水條件作用後進行工程性質試驗:間接張力試驗、靜態潛變試驗、動態潛變試驗、輪跡試驗和回彈模數試驗,評估不同浸水條件作用對PAC混合料之影響。
本研究定義浸水前後之工程性質比為水侵害比。根據結果顯示,在未浸水的狀況下,三種混合料的間接張力相近。浸水1天的條件作用後,AR-8000混合料之間接張力下降為未浸水之0.8倍、改質III型混合料為0.86倍、高黏度混合料為0.89倍。而浸水3、7天的條件作用皆呈現相同之趨勢,高黏度混合料有較高的水侵害比、改質III型次之、AR-8000為較低。此外根據間接張力與回彈模數試驗定義消散潛變能;動、靜態潛變試驗定義潛變柔量;輪跡試驗,比較浸水前後之水侵害比,皆呈現與間接張力相符之趨勢。綜合各項結果,高黏度與改質III型混合料之抗水侵害能力較佳,AR-8000混合料較差。而添加防剝劑能有效改善AR-8000混合料抗水侵害之車轍績效。
Porous asphalt concrete is an alternative to traditional hot mix asphalt and is produced by eliminating the fine aggregate from the asphaltmix. Rain that falls on the friction course drains through the porous layer to the original impervious road surface at which point the water drains along the boundary between the pavement types until the runoff emerges at the edge of the pavement. Porous asphalt concrete overlays are used to improve drivability in wet weather conditions and to reduce noise from highway traffic. The void space in porous asphalt concrete overlay layer generally is 15-25%. Taiwan special climatic environment, enables porous asphalt concrete to have the opportunity to be at the moist condition for a long time. This research uses the same porous asphalt concrete mix design result, coordinates three kind of different asphalt to make the mixture: AR-8000 asphalt, high viscosity asphalt and modified III asphalt. And soaks mixtures in water on 60℃ several days: 0, 1, 3 and 7 days. Mixtures after the immersion condition function carries on the project experiment: The indirect tensile test, the static creep test, the dynamic creep test, the track test, and the resilient modulus test, to appraise the different immersion condition function to influence of the porous asphalt concrete mixture.
This ratio of parameters affected by moisture conditioning to the control state is referred to moisture damage ratio. Demonstrated according to the result that without immersion condition, three kind of mixture's indirect tensile are close. After immersing 1 day-long condition function, the indirect tensile of AR-8000 asphalt mixture drop is 0.8 time, the indirect tensile of modified III asphalt mixture drop is 0.86 time, the indirect tensile of high viscosity asphalt mixture drop is 0.89 time. And immerses 3, 7 day-long condition functions to present the same tendency, the high viscosity asphalt mixture has the higher moisture damage ratio, and the AR-8000 asphalt mixture has the lower moisture damage ratio. Other test result all presents the same tendency. Synthesizes each result, the high viscosity asphalt mixture and modified III asphalt mixture are highly resistant to moisture damage, and AR-8000 asphalt is lowly. In addition antistrip additive was effective to decrease the moisture damage in AR-8000 asphalt mixture.
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