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題名 | 應用廢鑄砂於控制性低強度材料產製混凝土=Application Waste Foundry Sand in Controlled Low Strength Materials to Construct Concrete |
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作者姓名(中文) | 王偉哲; 鄭玉旭; 王承德; | 書刊名 | 聯合學報 |
卷期 | 24 民93.06 |
頁次 | 頁105-121 |
分類號 | 440.327 |
關鍵詞 | 廢鑄砂; 控制性低強度材料; Waste foundry sand; CLSM; |
語文 | 中文(Chinese) |
中文摘要 | 替代傳統土石滾壓後作為結構填方或回填之用,乃是控制性低強度材料(CLSM)的主要用途。國內廢鑄砂料源係將鑄造廠生產鑄件所產生之廢棄物,包括爐渣、廢鑄砂及集塵灰等混合而得,並依各種廢鑄砂之源頭產量比例適當調配,充分再生利用。本研究以混合三種鑄造業中所產生之廢鑄砂濕模砂系統、夫喃砂系統及水玻璃砂系統,經磁選、篩分、破碎等程序,而製成粒徑較均勻之骨材,除了可以增加CLSM的流動性外,亦可去除較粗粒料的干擾,而能有效地控制單軸抗壓強度。另外,將磁選置於篩分、破碎之前,除了可以保護篩分及破碎設備,亦可精簡製造流程,節省維護成本。本研究探討廢鑄砂、水及水泥拌製混凝土之工作度及流變行為,以及配比設計對其新拌混凝土之物理性質及硬固混凝土之力學性質之影響。實驗結果顯示,採用本批試驗材料來拌製控制性低強度混凝土宜將水固比(W/S)控制在0.3~0.32 之間,而灰水比(C/W)採用0.4,可得到密度低具穩定、良好的工作度及抗壓強度且經濟的控制性低強度混凝土,符合CLSM 要求早期強度高、晚期強度低的條件,達成廢棄物減量,資源有效循環使用之目的。 |
英文摘要 | Controlled Low Strength Materials (CLSM) are Engineered and manufactured backfills that have a specified compressive strength lower than 1200psi at 28 days. CLSM are self-leveling, liquid-like materials, and self-compacting. Benefits of CLSM include limited required labor, accelerated construction, ready placement at inaccessible locations, and the ability to be manually re-excavated. Applications for CLSM include utility trenches, building excavation, underground storage tanks, abandoned sewers and utility liners and filling underground mine shafts. Generally, CLSM is a mixture of sand, cement, and water. Sand is the major component of most, consequently, using waste material as a substitute for natural sand results in the beneficial use of the waste material. Waste foundry sand was as a fine aggregate in this study, Three sands from ferrous foundries were used. After pre-treatment procedures, such as magnetic separation, crusher and screen, greens sands were regenerates as fine aggregate to mix up CLSM. The flow behavior and hardening characteristic of CLSM were investigated. Finally, the ultimate cement/water rater ratio was determent as 0.4 and water/solid ration was 0.3 to 0.32 for performing stable flowability and strength. As 190kg of Cement was used in concrete , it economic and can meet the standards of higher early compressive strengths and lower compressive strengths. All this shows mixture waste foundry sand can be properly utilized in the designed of CLSM mixture proportions for achieving the good of using resourceable materials. |
本系統之摘要資訊系依該期刊論文摘要之資訊為主。