| 摘要: | 與熱拌瀝青相比，冷再生混合物具有更大的環境效益；然而，它們的機械性能和耐用性較差。這項研究的目標是創造一種冷再生混合物，透過摻入爐渣來提高冷再生混合物的耐久性。該方法旨在透過以礦渣材料取代再生瀝青路面 (RAP) 來減少廢棄物處置。不幸的是，台灣不允許使用鹼性氧氣爐渣 (BOF)、電弧爐渣 (EAF) 和焚化爐底渣 (IBA) 進入 CRME。本研究評估了混合物中加入爐渣對性能和環境的影響。礦渣材料建議將RAP作為冷再生混合物中的添加材料。礦渣具有膠凝特性和石灰石 (CaO) 成分。將礦渣摻入混合物中可望提高冷回收混合物的機械性能。該研究檢查了 RAP、BOF、EAF 和 IBA 是否符合 AASHTO MP-31 標準，廢料含量最多為 15%。乳化瀝青用作黏合劑。在性能試驗前確定了乳化瀝青、水泥和水的最佳含量。實驗室測試包括間接拉伸強度 (ITS)、拉伸強度比 (TSR) 和靜態蠕變測試。使用毒性特徵浸出程序 (TCLP) 和體積膨脹測試 (ASTM D-4792) 評估環境影響。最佳乳化劑、水泥和水含量分別為3.5%、0.7%和2.5%。機械測試結果表明，BOF 和 EAF 混合物具有更高的強度、防潮損壞性和抗永久變形性。 在 TCLP 測試中，根據標準限制，所有材料的指定重金屬濃度均低於以下值。膨脹穩定性測試結果顯示，所有材料在7天時膨脹低於0.5%，符合ASTM D2940規定的限制。研究得出的結論是，礦渣值得在冷再生混合物中使用，因為它對機械性能和環境效益有正面影響。利用爐渣有助於減少台灣的爐渣浪費，並可望進一步研究。;Cold recycled mixtures offer greater environmental benefits compared to hot mix asphalt; however, their mechanical performance and durability are inferior. The goal of this research is to create a cold recycling mixture that improves the durability of a cold recycled mixture by incorporating slags. This approach aims to reduce waste disposal by substituting slag materials for Reclaimed Asphalt Pavement (RAP). Unfortunatelly, using Basic Oxygen Furnace slag (BOFs), Electric Arc Furnace slag (EAFs), and Incinerator Bottom Ash (IBA) not allowed into CRME in Taiwan. This study asses the impact of including slag in the mixture on the performance and environment. Slag materials propose to incorporate RAP as addition materials in cold recycled mixture. Slag has cementitious properties and limestone (CaO) compositions. Incorporating slag into the mixture is expected to increase the mechanical properties of a cold recycled mixture. The study examines RAP, BOFs, EAFs, and IBA conforming to the AASHTO MP-31 standard with a maximum of 15% waste materials. Emulsified asphalt is used as a binder. The optimum contents of emulsified asphalt, cement, and water were determined before performance testing. Laboratory tests included indirect tensile strength (ITS), tensile strength ratio (TSR), and static creep tests. Environmental impact was assessed using the Toxicity Characteristic Leaching Procedure (TCLP) and volume expansion tests (ASTM D-4792). The optimum emulsified, cement, and water content were found to be 3.5%, 0.7%, and 2.5% respectively. Results of mechanical tests showed that BOFs and EAFs mixture provide higher strength, moisture damage resistance, and resistance to permanent deformation. In the TCLP test, all materials show concentrations of specified heavy metals below according to standard limitation. The result of the expansion stability test showed all materials were expanded lower than 0.5% at 7 days which satisfies the limitation specified by ASTM D2940. The study concludes that slag is worth using in cold recycled mixtures due to its positive impact on mechanical properties and environmental benefits. Utilizing slag helps decrease slag waste in Taiwan and is promising for further research. |
