不銹鋼爐碴含量對CLSM材料工作性之影響

Workability of Controlled Low Strength Materials Consist of Stainless Steel Slag

不銹鋼爐碴包括氧化碴與還原碴，二者均為不銹鋼製程之副產物。本研究係探討以氧化碴取代細骨材及還原碴取代膠結料，應用於高流動性低強度材料（CLSM）之工作性研究。試驗變數包括水膠比為1.1、1.3及1.5，氧化碴取代細粒料重量比例為0%、50%、75%及100%，還原碴取代膠結料重量比例為0%、25%及50%。結果顯示利用氧化碴與還原碴，均可製作出符合工程性質需求之CLSM材料。當氧化碴取代細骨材為50%時，CLSM材料之工作性為最佳；當氧化碴取代細骨材達100%時，因氧化碴比重大易沉積導致骨材漿體產生析離；並且CLSM材料單位重隨著氧化碴取代細骨材比例愈大而增加；凝結時間則隨著氧化碴取代細骨材比例愈大而縮短。還原碴取代膠結料重量比例達25%至50%時，膠結料漿體能有效包覆骨材，能帶動骨材流動使CLSM材料工作度增加。又還原碴取代膠結料比例愈大，則凝結時間亦隨延長，即還原碴在不銹鋼爐碴CLSM中具有緩凝效用。

Both of the SSOS and the SSRS are the products produced by the stainless plant. The purpose of the research is to explore the feasibility and workability of the CLSM when the SSOS replace the fine aggregate and the SSRS replace the binder. The variables of research include the binder is about 130 kg/m3 to result that W/B is 1.1, 1.3 and 1.5, respectively. The weight ratios of SSOS replacing the fine aggregate are 0%, 50%, 75% and 100%. The weight ratios of the SSRS replacing the binder are 0%, 25%, and 50%. The results shows utilizing the SSOS and the SSRS can produce the CLSM meeting the requirement of the engineering property. When the SSOS replacing fine aggregate will reach 50%, it is the best workability. The heavy specific gravity of the fine aggregate deposit easily to cause the segregation of the fine aggregate when the SSOS replacing fine aggregate will reach 100%. As the SSOS replace the fine aggregate more, the unit weight and pulse velocity of CLSM raise, but the setting time reduce. When the proportion of the SSRS replacing the binder reaches from 25% to 50%, the binder can effectively enough to wrap up the fine aggregate, making other aggregate flow to increase the workability of CLSM, and as the SSRS replace the binder more, the setting time of CLSM increase relatively.