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    題名: 溫拌添加劑用於再生瀝青混凝土性質之研究
    其他題名: Using warm mix additives with reclaimed asphalt pavement material in asphalt mixture
    作者: 王啟人;wang, Qi-ren
    貢獻者: 淡江大學土木工程學系碩士班
    劉 明 仁;Liu, Ming-Jen
    關鍵詞: 再生瀝青混凝土;溫拌添加劑;夯壓溫度;刨除料;工作性;reclaimed asphalt pavement (RAP);warm mix asphalt (WMA);Sasobit®;H8;Rediset®;WMX;workability
    日期: 2011
    上傳時間: 2011-06-16 22:06:23 (UTC+8)
    摘要: 再生瀝青混凝土之利用是未來之趨勢,除可響應推動綠色大地資源保護外,亦可解決部份工程材料之短缺,以改善台灣所面臨砂石料源缺乏之嚴重問題。再生瀝青混凝土使用高比例刨除料比例時,其製造所需之拌合溫度和夯壓溫度隨之升高,添加溫拌添加劑用於再生瀝青混凝土可使混合粒料過程中使用較低溫度並減少能源消耗,提高施工時之工作性,並可獲得與傳統熱拌再生瀝青混凝土相近之成效表現。
    本研究主要以不同夯壓溫度下進行工程性質之實驗室試驗,探討溫度與溫拌添加劑和刨除料三者之關係,以提供國內鋪面工程應用溫拌再生瀝青混凝土之參考。本研究採用不同比例(0、35 及70%)之RAP,分別添加溫拌添加劑1.5%之 Sasobit®H8和2.0%之 RedisetTM WMX,依密級配瀝青混凝土Marshall配比設計,以不同夯壓溫度分別進行試驗。工作性試驗夯壓溫度分別為148℃、128℃、108℃。間接張力試驗、回彈模數試驗、車轍輪跡試驗則分別以標準夯壓溫度與低溫夯壓溫度(標準夯壓溫度減少40℃)作為試驗溫度條件,根據試驗結果得到初步結論如下:

    1. 本研究工作性試驗結果顯示,添加溫拌添加劑可使工作性改善,刨除料之使用會使工作性變差,但添加溫拌添加劑後可使工作性增加 ,顯示再生瀝青混凝土添加溫拌添加劑可促進工作性提升。在148℃之夯壓溫度且未添加溫拌添加劑和108℃之夯壓溫度且添加溫拌添加劑之組別相比較,其結果兩者相差不大,顯示溫拌添加劑的使用有助於在較低溫下的環境進行鋪面施工,可高工作性。
    2. 間接張力試驗結果顯示,添加溫拌添加劑組別大都高於未添加劑組別,標準夯壓溫度組別都高於低溫夯壓溫度組別,且添加RedisetTM WMX組別略優於添加Sasobit®H8組別。
    3. 回彈模數試驗結果顯示,刨除量使用比例增加時回彈模數隨之增高,添加溫拌添加劑亦可使回彈模數增高,不同的夯壓溫度下,標準夯壓溫度之回彈模數皆略高於低溫夯壓溫度之組別。
    4. 車轍輪跡試驗結果顯示,添加溫拌添加劑與使用較高的刨除量皆有助於動穩定值的增高,且標準夯壓溫度組別之動穩定值比低溫夯壓溫度之組別高。
    5. 統計分析結果顯示,本研究試驗中添加Sasobit®H8組別與添加RedisetTM WMX組別並無顯著差異。使用刨除料比例增加時,間接張力試驗、回彈模數試驗與車轍輪跡試驗之數值亦隨之增高。
    The use of recycled asphalt pavement (RAP) will be the future trend with the advantages of promoting the environment protection and mitigating the shortage of aggregate supply problem. Mxing and compacting temperatures increase with higher RAP contents. The benefits of using RAP with the warm-mix agents include: reduced emissions, reduced fuel usage, and better field compaction with less effort. Warm mix asphalt (WMA) can provide equal to or better performance than traditional hot-mix asphalt (HMA).
    This study was conducted to examine the relationships among temperature, warm-mix agents, and RAP. Dosages of 0%, 35%, and 70% RAP with 1.5% Sasobit®H8 and 2% RedisetTMWMX, respectively, were used in this study. Tests were conducted under 148℃, 128℃, and 108℃ compacting temperatures after the dense-graded Marshall Design to compare the workability of the mixtures. Indirect tensile strength, resilient modulus and wheel tracking tests were conducted under the standard and the low (40℃ lower than the standard) compacting temperatures. The results of this study are concluded as follows:
    1. Asphalt mixtures containing RAP showed less workable than the mixtures without RAP. However, warm-mix agents can improve the workability of mixtures with RAP. The mixtures with warm-mix additive at 108℃compaction temperature showed similar workability to the mixtures without warm-mix additive at 148℃.
    2. From the indirect tensile strength test results, it was found that the tensile strength of specimens containing RAP with warm-mix additives is better than that of one without warm-mix additives. The tensile strength of specimen tested at the standard compaction temperature is higher than that of one at the low temperature. The tensile strength of specimens with Sasobit®H8 is lower than that of the ones with RedisetTM WMX.
    3. Our test results showed that the resilient modulus increases with higher RAP contents. The resilient modulus also increases with addition of warm-mix additives. The resilient modulus at the standard compaction temperature was a little higher than that at the low compaction temperature.
    4. The wheel tracking test results showed that the dynamic stability (DS) increases with both RAP contents and the addition of warm-mix additives. The DS at the standard compaction temperature is higher than that at the low temperature.
    5. The statistical analysis concluded that the results of all tests with Sasobit®H8 and RedisetTM WMX were not significantly different. The test values from the indirect tensile, resilient modulus and wheel tracking test results generally increased with increasing RAP contents.
    顯示於類別:[土木工程學系暨研究所] 學位論文

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