臺灣博碩士論文加值系統

摘要
本研究主要針對石材加工所產生之石材廢泥再利用之研究，方式是取代混凝土中的砂作為填充料，並以混凝土工作性質 (坍度試驗)、力學性質 (抗壓強度試驗)、耐久性質 (AASHTO T259)進行可行性評估。石材廢泥脫水後約有20%之含水率，故需先處理成OD狀態，再磨成粉末狀過 #200篩，本研究取停留在 #200上的石材廢泥粉末再利用。經配比計算所需砂的重量，再以砂的重量百分比10%、20%、30%、40%用石材廢泥粉末取代之。
試驗結果顯示，就混凝土工作性而言，水灰比高者(w/c=0.55，0.65)，加入石材廢泥粉末對混凝土的工作性影響較小。石材廢泥粉末對混凝土單位重的影響不大。石材廢泥粉末取代比例 20% 以上，混凝土的力學性質、耐久性質均有遞減之現象，水灰比高者 (w/c=0.65)此現象更明顯。經試驗結果評估，本研究認為w/c=0.45、0.55時，取代比例最大不可超過20%，而w/c=0.65取代比例最大不可超過10%。
以本研究而言，F.M是否合乎規定直接影響到本研究試驗的結果，證明級配對混凝土性質的重要性。石材廢泥雖為廢棄物，再利用可降低成本，但利用的前製作業烘乾、磨成粉末狀、過篩等步驟所增加的成本，實際利用時需考慮。
關鍵字：石材、石材廢泥、鹽水浸漬試驗、擴散係數

Abstract
This research mainly aims at the reuse of stone material sludge resulted from the stone material processing. The method is to use the stone material sludge resulted from the stone material processing to be stuff of the cement instead of sand in cement, then proceed the feasibility study with the concrete workability (slump test), the mechanical properties (compressive strength test) and the durability (AASHTO T259). The stone material sludge is about 20 % water content after dewatering. It is needed to process to be OD condition and than grind it into fine powder sieve out #200. The research selected the stone material sludge powder, which was sieved by 200# and use that for continuing the experience. After computing the amount-needed sand, then add 10%、20% 、30%、40% of the fine powder #200 replaced the same percent of the sand sequentially.

After the experiment, as far as the concrete workability, there are slighter influences for the concrete mixed with the stone material sludge, which is with higher water cement ratio (w/c=0.55, 0.65). The experience also shows that there is no significant influence for the concrete unit weight when mixing the stone material sludge and the concrete. When the substitution proportion of stone material sludge powder is above 20%, both the concrete mechanical properties and the durability have the phenomenon of decreasing progressively. The decrease phenomenon is obviously with increase of the water cement ratio (w/c=0.65). According to the conclusion of this study, the highest proportion of substitution cannot be more than 20% when w/c=0.45, 0.55, and the highest proportion of substitution can not be more than 10% when the w/c=0.65.

In this study, whether F.M. conforms with （complies with）the specifications has direct influences on the result of the experiment. It proves the importance of gradation to concrete properties. Although the stone material sludge is wastes, the reuse of it may reduce the cost. When it is used in practice, the increase on the cost owing to operation steps as drying, ground to powder and sieving at preposition period must be considered.
Keywords：ponding test、stone material sludge、AASHTO T259、
Diffusion coefficient

論文目錄
圖目錄 …………………………………………………………….Ⅰ
表目錄 …………………………………………………………….Ⅱ
中文摘要 ………………………………………………………………1
英文摘要 ………………………………………………………………2
第一章 緒論
1-1研究動機 …………………………………………………..3
1-2研究目的及評估指標 …...….……………………………..4

第二章 文獻回顧
2-1石材污泥之來源及其特性………………………………….5
2-2混凝土孔隙結構 ……………………………………………12
2-3氯離子在混凝土中之傳輸機理 ……………………………14
2-4影響混凝土耐久性因子 …………………………………....16
2-5評估耐久性的試驗 ………………………………………....18
第三章 試驗計劃
3-1試驗變數及試體編號 ………………………………………22
3-2試驗材料 ……………………………………………………23
3-3混凝土配比設計 …………………………………………....31
3-4試驗設備 ……………………………………………………32
3-5試驗項目及試驗方法 ………………………………………33
第四章 結果與討論
4-1石材污泥粉末取代砂對新拌混凝土工作性的影響 ………42
4-2石材污泥粉末取代砂對新拌混凝土泌水率的影響 ………47
4-3 石材污泥粉末取代砂對新拌混凝土單位重的影響 ……...49
4-4石材污泥粉末取代砂對硬固混凝土抗壓強度的影響 ……53
4-5石材污泥粉末取代砂對水泥砂漿氯離子擴散深度的影響 …………………………………………………………..61
第五章 結論與建議
5-1 結論 ………………………………………….……………..88
5-2 建議 ……………………………………………….………..89
參考文獻 ………………………………………………………………90

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