- 學位論文
氣冷高爐石及滾筒轉爐石應用於再生級配料之可行性研究
Feasibility Study on the Application of Air-Cooled Blast Furnace Slag and Baosteel Slag Short Flow (BSSFS) Steel Slag in the Production of Recycled Aggregate
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摘要
台灣的腹地相對於其他國家小，天然資源也比較有限，隨著時間的推移，天然資源的短缺問題日益嚴重，這也是全球所面臨的共同挑戰。因此，本研究與其他先進國家一樣，積極尋找可替代天然資源的材料。因我國鋼鐵業相當興盛，然而在煉鋼和煉鐵的過程中，會產生大量的爐碴，而這些爐碴有多種類型，其中一些已經在土木工程上部分應用，而部分爐碴則繼續堆積在堆積場中。因此，本研究主旨在利用兩種煉鋼和煉鐵過程產生的爐碴副產物，即氣冷高爐石和滾筒轉爐石進行研究。 過去，轉爐石作為建築材料受到其在接觸水分時膨脹的限制，然而本研究所使用滾筒轉爐石的文獻資料較少，且因滾筒轉爐石製作過程已經適當的安定化處理，大幅降低滾筒轉爐石的膨脹特性。因此，在本研究中除了關注滾筒轉爐石與氣冷高爐石膨脹性能外，並進行力學試驗，包括夯實試驗、加州承載比試驗(CBR)、Clegg衝擊試驗和現地透水量試驗，以評估作為再生級配料的可行性。 經由CBR、現地透水量、浸水膨脹以及Clegg試驗結果得知，配比氣冷高爐石80%滾筒轉爐石20%具有整體配比最優的CBR值和較好的CIV值，以及最優的透水量和較低的膨脹特性，同時氣冷高爐石可再利用高達80%；而配比氣冷高爐石60%滾筒轉爐石40%具有整體配比次優的CBR值和較好的CIV值，以及較優的透水量和較低的膨脹特性，同時氣冷高爐石可使用高達60%而滾筒轉爐石40%。此外，根據11組配比之試驗結果，不僅在膨脹試驗方面符合相關規範，於抗承載力試驗下也都有較優的強度，其他試驗結果也符合相關規範標準甚至遠高於標準值。
並列摘要
Taiwan has a relatively small land area compared to other countries, and its natural resources are also limited. Over time, the problem of resource scarcity has become increasingly severe, posing a common challenge faced globally. Therefore, like other advanced nations, we actively seek alternative materials to substitute for natural resources. In this regard, Taiwan's steel industry has experienced significant growth. However, the steelmaking and ironmaking processes generate a substantial amount of slag, consisting of various types. Some of these slags have already found partial applications in civil engineering, while others continue to accumulate in storage yards. Consequently, the aim of this study is to investigate the utilization of two types of slag by-products generated during the steelmaking and ironmaking processes, namely air-cooled blast furnace slag and Baosteel Slag Short Flow (BSSFS) Steel Slag. In the past, the use of basic-oxygen-furnace (BOF) slag as a construction material was limited due to its expansion when in contact with moisture. However, in this study, Baosteel Slag Short Flow (BSSFS) Steel Slag was chosen as one of the materials. Although there is limited literature on drum Baosteel Slag Short Flow (BSSFS) Steel Slag, it has undergone appropriate stabilization treatment during its production process, significantly reducing its expansion characteristics. Therefore, in this study, besides focusing on the expansion properties of Baosteel Slag Short Flow (BSSFS) Steel Slag and Air-cooled Blast Furnace Slag, other mechanical tests such as compaction test, CBR test, Clegg impact test, and in-situ permeability test were conducted to evaluate the feasibility as recycled aggregate materials. The results of this study showed that the maximum utilization of ACBFS was achieved in the ratio of ACBFS 80% + BSSFS 20%. For Baosteel Slag Short Flow (BSSFS) Steel Slag, the maximum utilization was found in the ratios of NA 20% + ACBFS 40% + BSSFS 40%, NA 40% + ACBFS 20% + BSSFS 40%, and NA 60% + BSSFS 40%, with a maximum utilization of 40%. Both ACBFS and BSSFS could be simultaneously used in the ratio of ACBFS 60% + BSSFS 40%. Furthermore, based on the results of the 11 ratios, not only did they meet the relevant specifications in terms of expansion tests, but they also exhibited superior strength in load-bearing capacity tests. Other test results also met or even exceeded the standard values set by relevant specifications.
參考文獻
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