冷拌再生工法在國外應用及發展已行之有年，臺灣自經濟起飛時代起，政府推行許多道路建設，導致道路新建與整修工程逐年成長，而道路經刨除重鋪後衍生出之瀝青刨除料已面臨過剩及囤積問題。本研究參考國外冷拌再生技術添加100%瀝青刨除料進行實驗室成效評估及現地驗證工程，以探討其應用於臺灣道路底層之可行性。由於國內尚未訂定冷拌再生乳化瀝青混凝土相關規範，故本研究以AASHTO PP 86規範結合公共工程委員會施工綱要規範第02714章「瀝青處理底層」E類粒料級配規範進行馬歇爾法及間接張力法之配合設計，並藉由 AASHTO MP 31、ARRA CR201評估後選取最適配比，再以最適配比進行冷拌再生乳化瀝青混凝土之實驗室成效試驗及現地驗證工程。配合設計之粒料級配比例以40%粗刨除料及60%細刨除料進行摻配，並依規範建議添加1.5%拌和水量及不同比例之乳化瀝青與水泥製作馬歇爾試體，經規範評估後，最適配比採0.5%水泥(第I型)及4%乳化瀝青(CSS-1)。由實驗室成效試驗結果得知，冷拌再生乳化瀝青混凝土能迅速呈穩定狀態且強度符合相關規範要求。由現地驗證道路成效試驗結果得知，整體道路水準維持於良好狀態。在可行性評估上，與一般熱拌瀝青處理底層、控制性低強度混凝土(CLSM)及曾偉原(2016)冷拌再生發泡瀝青混凝土進行施工排程、施工成本及碳排放量之比較下，具有減少工時、降低材料成本及節能減碳之效益。綜合以上所述，冷拌再生乳化瀝青混凝土可應用於臺灣市區道路底層，並能減少瀝青刨除料囤積空間，達到瀝青刨除料完全去化之目標。

The cold mix recycling method has been used widely in global. Road construction and renovation projects growth yearly in Taiwan. Causing the recycled asphalt pavement (RAP) accumulation and leads to excess and stockpiling problems. This study refers to the foreign cold mix recycling technology that aims to explore the feasibility of adding 100% RAP application to the base of Taiwan pavement along with laboratory evaluation and test road verification. Since relevant specifications regarding emulsified asphalt content of cold recycling mixture designs haven’t been issued in Taiwan. Laboratory test in this study uses AASHTO PP 86 specification in combination with Taiwan Specifications for Public Construction Chapter 02714“Bituminous treated base” E-class granule-grading curve for Marshall and indirect tensile stress mix design. After the mix design, AASHTO MP 31 and ARRA CR201 specifications are used to determine the optimum mixture, and then the road test is carried out using optimum mixture with 40% coarse RAP and 60% fine RAP. Marshall specimens with different emulsified asphalt and cement contents are prepared for further testing. The optimum mixture was found to contain 0.5% cement (Type I), 4% emulsified asphalt (CSS-1) as cementitious material and 1.5% of water. The laboratory result shows cold mix recycled emulsified asphalt concrete can quickly stabilize and the strength meets the relevant specifications' requirement. Moreover, according to the field road verification test results, the overall result maintained in good condition. In the feasibility assessment, the cold mix recycled emulsified asphalt concrete has better benefits in construction time, energy saving and carbon dioxide reduction when compared with conventional controlled low-strength concrete (CLSM), hot mix asphalt (HMA) and cold mix recycled foamed asphalt concrete (research by Wei Yuan Zeng. 2016). In summary, the cold mix emulsified asphalt concrete can be used in Taiwan pavement base while reducing the RAP stockpiling to reach the goal of eliminating the RAP.

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