垃圾焚化爐底渣透水混凝土應用於道路底層之研究

隨著社會科技的發展，人們開始一味地追求經濟成長，使得自然資源過度開發與破壞，物質的需求提高，導致垃圾廢棄物隨之增加，而垃圾廢棄物所衍生之問題，在地狹人稠的台灣特別突出，因此近年來環保意識的興起，將廢棄資源進行再生利用並以永續發展作為原則，而將垃圾廢棄物進行焚燒後，所產生之副產物稱為垃圾焚化爐底渣。慢慢堆積的垃圾焚化爐底渣，已開始為社會環境造成威脅，故本研究係以垃圾焚化爐底渣取代部分天然石之用量，製作低密度再生透水混凝土，而試驗前先探討垃圾焚化爐底渣基本性質以及粒徑分布，並利用 SEM試驗得知垃圾焚化爐底渣之內部結構十分單薄，而內含 C-S-H 膠體所需之 Ca、Si、Al。本研究低密度再生透水混凝土之垃圾焚化爐底渣設定 4種不同取代量為 0%、10%、20%、30%，水灰比以所有取代量皆滿足坍度試驗規範之結果作為後續試驗之水灰比0.45，經後續之抗壓強度試驗、透水率試驗、單位重試驗得出垃圾焚化爐底渣於低密度再生透水混凝土之最佳取代量 20%並應用於道路底層，最後利用反彈錘試驗、現地透水量試驗、DCP 試驗，探討低密度再生透水混凝土於現地之成效，並運用DCPI 值導出 CBR 值與 Mr 值，以及使用迴歸分析推出迴歸方程式，得知其齡期 3 天時，皆可達到工程規定。

關鍵字

垃圾焚化爐底渣；低密度再生透水混凝土；道路底層

並列摘要

As the new technology is developing quickly and the pursuit of the economic growth becomes the main object for most countries. The development of the natural resource becomes overused and damaged. More demand on the different materials is highly acquired. Hence, the amounts of different wastes are growing fast and become an important issue to all the countries. It’s an emerging problem to Taiwan, an island with a scarce land. In Taiwan, the municipal solid wastes are mostly incinerated to reduce the volume of the wastes. However, the bottom ash, a bi-product of incineration of solid wastes, is produced and gradually accumulated becoming another emerging problem to be solved. In this study, the bottom ash is applied to replace part of the natural aggregates to manufacture the low density reclaimed permeable concrete. The basic properties and aggregate aggradation distribution of bottom ash are investigated. Moreover, the results performed by the SEM to investigate the interior structures of the bottom ash shows that the interior structures of the bottom ash were slender. Four different amounts of natural aggregates, 0, 10, 20, and 30%, are replaced by the bottom ash. The water/cement ratio of 0.45 for each design with bottom ash replacement are met the requirement of the standard of slump test. The best optimum replacement amount of bottom ash is 20%, which is determined by the results obtained from compressive strength test, permeability test, and unit weight test when applied the reclaimed permeable concrete to the base layer of the pavement. The rebound hammer test, in-situ permeability test, and DCP test are carried out to assess the in-situ performances of the reclaimed permeable concrete. Furthermore, the CBR and Mr values are obtained from the DCPI values and the regression equation is acquired from the regression analysis for obtaining appropriate concrete age in strength which is 3 days had met the engineering requirement.

並列關鍵字

incinerator bottom ash ； low density reclaimed permeable concrete ； pavement base layer

參考文獻

[1]孟宏睿、陳麗紅，「改善透水混凝土性能方法的試驗研究」，陜西理工學院學報(自然科學版)，第26卷，第一期，2010年。

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