以奈米壓痕技術探討鹼激發爐碴基漿體之微觀力學性質

MICROMECHANICAL PROPERTIES OF ALKALI-ACTIVATED SLAG-BASED PASTE EXPLORED BY NANOINDENTATION

10.6652/JoCICHE.202209_34(5).0009

莊昀倩(Yun-Chien Chuang)；周侑婷(Yu-Ting Chou)；陳君弢(Chun-Tao Chen)；陳璽安(Hsi-An Chen)

奈米壓痕 ； 水淬高爐爐碴粉 ； 鹼激發 ； 簡化模數 ； nanoindentation ； ground granulated blast furnace slag (GGBS) ； alkali-activation ； reduced modulus

中國土木水利工程學刊

34卷5期（2022 / 09 / 01）

435 - 440

英文

本研究以奈米壓痕技術測定水淬高爐爐碴粉基鹼激發漿體之簡化模數與硬度，探討其微觀力學性質與抗壓強度、齡期、液固比（0.4、0.6）、鹼激發劑混合比例（氫氧化鈉與水玻璃體積比=4:6、5:5、6:4）間的關係。單點壓痕試驗的結果顯示，未反應之爐碴粉較反應膠結物具有較高的簡化模數與硬度。於各齡期時，液固比0.4之配比較液固比0.6者具有較高的抗壓強度，同時其7天與28天齡期時的簡化模數與硬度較高。混合比4:6者具有最高的7天與28天抗壓強度。於7天齡期時，其反應膠結物的簡化模數和硬度亦皆較高。

This study determined the reduced modulus and hardness of the ground granulated blast furnace slag (GGBS)-based alkali-activated paste using nanoindentation to explore the relationships among its micromechanical properties and the compressive strength, the age, the liquid to solid ratios (LS) (0.4 and 0.6) and the sodium hydroxide (Na(OH)2) to the water glass (WG) volume ratio of the alkaline activating solutions (4:6, 5:5, 6:4). The single-point nanoindentation showed that the white GGBS dots had higher reduced moduli and hardness than the dark hydration products. The mix with the liquid-to-solids ratio of 0.4 had a higher compressive strength than that with a ratio of 0.6 at all ages, and it had higher reduced moduli and hardness at 7 and 28 days. The mix with a ratio of Na(OH)_2:WG = 4:6 had the highest compressive strengths at 7 and 28 days, and it also had the highest reduced moduli and hardness at the dark hydration products at 7 days.

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