Micromechanical Properties of Alkali-Activated Slag-Based Paste Explored by Nanoindentation

被引：0
|
作者：
Chuang Y.-C. [1 ]
Chou Y.-T. [1 ]
Chen C.-T. [1 ]
Chen H.-A. [1 ]
机构：
[1] Department of Civil and Construction Engineering, National Taiwan University of Science and Technology, Taipei
来源：
Journal of the Chinese Institute of Civil and Hydraulic Engineering | 2022年 / 34卷 / 05期
关键词：
Alkali-activation; Ground granulated blast furnace slag (GGBS); Nanoindentation; Reduced modulus;
D O I：
10.6652/JoCICHE.202209_34(5).0009
中图分类号：
学科分类号：
摘要：
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. © 2022, Chinese Institute of Civil and Hydraulic Engineering. All right reserved.
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页码：435 / 440
页数：5
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