垃圾焚化爐底渣取代量對透水瀝青混凝土性質之影響

Effects of the properties of porous asphalt concrete mixed with waste incinerator bottom ash

賴俊彥(Chun-Yan Lai)

指導教授 ： 王弘祐

國立屏東科技大學/工學院/土木工程系所/碩士(2011年)

https://doi.org/10.6346/NPUST.2011.00257

摘要

全球環保意識高漲，垃圾焚化爐底渣再利用於道路工程中是未來一大趨勢，也可達到資源再生永續發展的目標，透水鋪面因能迅速將路面積水排除，且對於改善都市熱島效應也有正面的幫助，於台灣地區高溫多雨的環境逐漸受到重視。
本研究先分析底渣與天然粒料的性質，接著以不同底渣粗粒料取代比例(骨材總重量之0%、10%、20%及75%)取代透水瀝青混凝土之同重量天然粗粒料；並針對10%、20%取代比例之單一粒徑底渣(分別為#4號篩與3/8"號篩)取代同粒徑天然粒料，分成6組不同取代比例級配，搭配爐石粉與紅色色粉做為填充料，進行透水瀝青混凝土配合設計求出各組之最佳瀝青含量，進行孔隙率試驗、透水試驗及穩定值、流度值試驗。
綜合實驗結果顯示，底渣其粗粒料比重2.31低於天然粗粒料的2.62，其吸水率5.32%則大於天然粗粒料1.27%許多，具有多孔隙、粒形佳、輕質等優點，因底渣高吸水率特性，以底渣取代天然粒料時，需增加瀝青用量，造成成本提高。使用底渣並無造成穩定值降低的疑慮，反而隨著底渣取代量增加而增高，顯示添加過量的底渣會造成流度值偏高。孔隙率、室內透水試驗與現地透水值均隨底渣取代量增加而上升，連續孔隙率與透水係數呈現正相關性。

關鍵字

垃圾焚化爐底渣 ； 透水瀝青混凝土 ； 底渣再利用

並列摘要

With the recent increasing of global environmental consciousness and energy shortages, the bottom ash used in road pavements will become the major trend. The goals of resource recovery and sustainable development can be achieved. Due to high temperature and intensive rain in the Taiwan, the porous asphalt pavements have been adopted gradually in recent years. Besides the rapid drainage of surface water through its matrix, a positive benefit reducing the urban heat island effect is also expected.
Properties of bottom ash and natural aggregate are analyzed in this research. Six proportions of porous asphalt concrete containing natural and bottom ash coarse aggregate are made. In the AC specimens, different weight of natural coarse aggregate are replaced the bottom ash. The coarse aggregate in the proportions are: 100% natural aggregate, 100% bottom ash aggregate, and 10% and 20% of total aggregate eight of singular #4 and 3/8” grains respectively replaced by bottom ash with same size. Each proportion also contains dyeing powder and pulverized slag as filler to study their effects on the AC specimens. Marshall test is held to determine the optimum asphalt contents of the proportion proposed above. The void ratio, permeability, Marshall stabilities and flow values of the AC specimens made in this study are then measured.
The specific gravity is 2.31 of bottom ash coarse aggregate that is lower than 2.62 of natural coarse aggregate. The absorption capacity is 5.32% of bottom ash coarse aggregate that is much higher than 1.27% of natural coarse aggregate. Replacing natural aggregate by bottom ash aggregate will lead increase of the asphalt consumption and cost of the asphalt concrete. Marshall stabilities and flow values of the AC do not reduce when bottom ash aggregate substitution increases. The void ratios and permeability coefficient, both in laboratory and in-situ tests, rises when percentage of bottom ash used increases, and so do the drainage relevant consecutive air voids.

參考文獻

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