生質油應用於再生瀝青混凝土性質之研究

The Study of Biofuel Applied to the Reclaimed Asphalt Concrete

周建璋(Chien-Chang Chou)

指導教授 ： 林登峰 ； 羅煥琳

義守大學/理工學院/土木與生態工程學系/碩士(2014年)

https://doi.org/10.6343/ISU.2014.00357

摘要

本研究主要目的即在探討以不同取代量的生質油添加於AC-20等級的瀝青膠泥並且應用於再生瀝青混凝土，使用瀝青路面再生工法可以降低施工成本，亦節省天然粒料的與施工成本，且再生瀝青混凝土鋪面之應用乃鋪面工程發展未來的趨勢。而現今工程會也規定各機關在施工於道路工程刨除料添加不能超過40％，本實驗研究以40%刨除料做為實驗需求，以達工程上的最佳經濟效益。並針對針對生質油不同比例(0%、2%、4%、6%及8%)取代傳統瀝青膠泥，進行馬歇爾瀝青配合設計與相關試驗，評估生質油取代瀝青膠泥之適用性。研究結果發現生質油取代量過大會使導致黏度下降。另外，生質油取代量大於4%時其黏度、穩定值及流度值皆有明顯下降之趨勢，因此4%以下生質油取代量之瀝青混凝土穩定質及力學性會較佳。
生質油作為瀝青添加劑應用於再生瀝青混凝土可以有效改善再生路面的抗張裂的的能力，在25℃與40℃兩種不同溫度下，從結果而論回彈模數值會隨著生質油取代量增加而減少趨勢，但生質油2%的取代量至再生瀝青混凝土與溫度的不同情況下會有較高的回彈模數值，表示其在承載能力方面並不遜色於未添加之再生級配之瀝青混凝土，然生質油小於4%之浸水殘餘指數皆相近，但取代量達6%以上時其數值低於規範要求75%，主要是因生質油取代後會導致粒料間因瀝青膠泥黏度值過低導致瀝青不能有效的包覆粒料造成剝脫的現象，使得試體之抗水侵害能力大幅降低減少鋪面的使用年限，從結果來看生質油的優點再於添加2%或4%的抗承載能力會比未添加生質油的再生瀝青混凝土的好，但超過4%時能力會隨取代量上升而嚴重的下降，所以取代量建議不能超過瀝青取代量的4%。

關鍵字

改質瀝青 ； 黏度 ； 瀝青膠泥

並列摘要

The study of biofuel applied to the reclaimed asphalt concrete In this study, biofuel is applied to replace part of asphalt binder. Then, this asphalt binder with biofuel replacement is used in the reclaimed asphalt concrete. The object of this study is to investigate the effects of biofuel replacement on the properties of reclaimed asphalt concrete. Five different amounts of asphalt binder, 0, 2, 4, 6, and 8%, are replaced by the biofuel. To assess the applicability of asphalt binder replaced by different levels of biofuel, the Marshall mix designs and the related mechanical tests are performed in this study. The test results show that the viscosities of reclaimed asphalt concrete decrease with the increase level of biofuel replacement. Moreover, when the biofuel replacement is larger than 4%, apparent decreases of viscosity, stability, and flowability are observed. Hence, to obtain better performances in stability and mechanical properties of asphalt concrete, it suggests that the biofuel replacement should be less than 4%.
The study also shows that, when the biofuel is applied as additive to the reclaimed asphalt concrete, the resistance to tensile cracks on pavement is effectively improved. Furthermore, the bearing capacity of reclaimed asphalt concrete pavement with 2 or 4% biofuel replacement is better performed than that of pavement with no biofuel replacement. However, the bearing capacity is reduced when the amount of biofuel replacement is more than 4%. Moreover, results obtained from soaked stripping tests show that the resistance to stripping clearly reduced when the amounts of biofuel replacement are higher than 4% in reclaimed asphalt concrete pavement. It suggests that the maximum level of biofuel replacement should be less than 4% in the application to the reclaimed asphalt concrete.

並列關鍵字

modified asphalt ； viscosity ； asphalt binder

參考文獻

10. 謝政廷、李灝銘，「生質汽油產製技術」，化工，第59 卷，第1 期，第

16. 孫鈺峯、林晉勗、林師模，「生質能源、廢棄物回收與內生成長」，亞

2. 林裕仁，「生質能源利用新寵兒一木質顆粒」，林業研究專訊，第16

15. 周桂蘭，「我國生質燃油推動對能源供需規劃及CO2 排放影響分析」，

產燃料及石化原料可行性研究」，石油季刊，第43 卷，第2 期，第23