以電弧爐還原碴製成複合無機聚合物之研究

Composite Geopolymer Produced by Using Electric-arc Furnace Reductive Slag

林湧昱(Yung-yu Lin)

指導教授 ： 黃偉慶

國立中央大學/工學院/土木工程學系/碩士(2012年)

摘要

由於電弧爐還原碴具含有矽、鋁、鈣元素之特性，屬多鈣型鋁矽酸鹽類材料，於鹼性溶液中可溶出矽、鋁、鈣離子，並互相鍵結形成Si-O-Si架狀結構與C-S-H膠體共存之複合無機聚合物。本文以電弧爐煉鋼廠生產爐碴-還原碴製成複合無機聚合物砂漿試體針對物性及化性進行活化效能及微觀分析探討，並以水淬爐石粉取代還原碴用量改善抗壓強度不足、乾縮等問題進行探討。
本文試驗結果顯示，活性效能分析發現還原碴研磨細度越高時，抗壓強度具一最佳細度範圍，且砂漿試體養護溫度越高時抗壓強度隨之增加，而砂漿拌合時間表現上，抗壓強度亦隨拌合時間增加而提升，但強度增幅效果不顯著。以爐石粉部分取代還原碴於抗壓強度而言，隨爐石粉取代量增加則抗壓強度增加，但凝結時間亦隨之降低。
微觀分析中發現以還原碴製成複合無機聚合物砂漿試體於含鹼當量8%為Ca2+轉化分界點；於乾縮試驗以純還原碴而言，以含鹼當量8%為分界點，8%以上乾縮量則均低於8%以下，主要為Ca2+轉換與AlO4鍵結使C-S-H含量降低所導致；以爐石粉取代還原碴而言，乾縮量隨爐石粉取代量增加而減少。

關鍵字

鹼活化技術 ； 電弧爐還原碴 ； 無機聚合物

並列摘要

Electric arc furnace reductive slag contains the characteristics of silicon, aluminum, calcium is a multi-type calcium aluminum silicate materials, Si4+, Al3+, Ca2+ in an alkaline solution can be isolated, and the mutual bond formation of Si-O-Si and CSH gel the coexistence composite geopolymer. In this paper, the electric-arc furnace reductive slag produced composite geopolymer mortar specimens for physical and chemical performance and micro explore analysis, and the use of slag to replace the amount of reductive slag to improve the insufficient strength and shrinkage Analysis and Discussion.
The results showed that the strength analysis found that the higher the fineness of grind of reductive slag, the compressive strength has the best range, and mortar specimens curing temperature to improve the compressive strength increases, and the performance of mortar mixing time, the compressive strength increased with the mixing time increase with, but the strength increase of the result is not significant. Slag to replace reductive slag in terms of compressive strength, the slag replaced by the increase in the compressive strength increase, but the setting time decreases.
Microscopic analysis of reductive slag produced composite geopolymer mortar specimens in 8%(by Na2O) of Ca2+ into the cut-off point; To the purely reductive slag in the drying shrinkage test, 8%(by Na2O) cut-off point, Drying shrinkage of more than 8%(by Na2O) percent less than 8%(by Na2O) below the CSH gel was reduced by Ca2+ with AlO4 reaction.; Slag to replace reductive slag, the drying shrinkage with the slag to replace the amount of increase is reduced.

並列關鍵字

electric-arc furnace reductive slag ； geopolymer ； alkali-activator

參考文獻

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