經高溫製程產生含矽再生粒料之鹼質活性研究

ASR expansion behavior of recycling waste fine aggregates in concrete

俞紹康(Shao-kang Yu)

指導教授 ： 李釗

國立中央大學/工學院/土木工程學系/碩士(2011年)

摘要

近年來欲將廢棄物資源化再利用於取代水泥混凝土中的天然粒料，以符合近年努力進行的廢棄物回收再利用之綠色議題，同時亦可節約廢棄物處理成本，減輕環境的負擔。對於富含矽之再生材料若要再利用於水泥混凝土中，需注意可能發生鹼－矽反應(ASR)的潛在問題，若在釐清此些再生材料的ASR特性前，任意再利用於水泥混凝土中，可能會發生結構物產生嚴重的耐久性問題，因而衍生更多結構物安全及後續處理的問題。為了使富含矽的再生材料能適當安全的運用於水泥混凝土中，本研究將探討其最可能產生的潛在鹼－矽反應的特性，提供其資源化運用的建議。本研究先將國內環保署公告之廢棄物分成五類：爐碴、玻璃、陶瓷廢料、輕質粒料、及廢鑄砂等使用較快速的ASTM C289化學法進行材料的ASR潛在活性普查，針對具有潛在活性之材料；再利用標準規範ASTM C227和ASTM C1260等測長法綜合評估以確認再生粒料的ASR潛在活性；最後探討影響活性再生粒料的峰脹問題及抑制ASR膨脹量的方法。研究成果包括：1.台灣現有富含矽之廢棄物的ASR活性普查結果；2.活性再生粒料的ASR活性的峰脹效應（Pessimum Effect）；3.提出活性再生粒料之抑制ASR問題的方法；4.爐石應用前的熟化方法。

關鍵字

廢棄物 ； 鹼質與粒料反應 ； 峰脹效應

並列摘要

Recently, people study in replace natural aggregates with waste in cement concrete. Recycling of green waste issues, while also saving waste disposal costs, reduce environmental burden. For silicon-rich to re-use of recycled materials in concrete, the need to pay attention to possible alkali-silica reaction
(ASR) problems.
In this study, EPA announced the first domestic waste is divided into five categories: slag, glass, ceramic waste, lightweight aggregates, and sand casting scrap. The use of ASTM C289, C227, and C1260 measurement methods to
identify potential in ASR activity.
Research include:
1. Taiwan’s existing silicon-rich waste ASR activity survey results.
2. Activity of recycled aggregates in ASR expansion effect of peak activity(Pessimum Effect).
3. Proposed activity of recycled aggregates of the problems in habiting ASR method.
4. Before apply furnace slag need to confirm the volume stability.

並列關鍵字

recycling waste ； pessimum effect ； ASR

參考文獻

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