Micro- and macro-scale characterization of nano-SiO2 reinforced alkali activated slag composites

作者：Long, Wu-Jian^*; Xiao, Bing-Xu; Gu, Yu-Cun; Xing, Feng

来源：Materials Characterization, 2018, 136: 111-121.

DOI：10.1016/j.matchar.2017.12.013

• Alkali activated slag cement composites
• X-ray computed tomography
• Nanoindentation
• SEM-EDS
• Microstructure

The effect of nano-SiO2 on the micromechanical properties and microstructure of alkali-activated slag cement (AASC) composites was investigated. The investigation involved the use of: (i) nanoindentation to determine the elastic properties of the constituent phases using statistical deconvolution; (ii) scanning electron microscopy equipped with energy-dispersive X-ray spectroscopy and backscattered electrons to identify and characterize the solid phases in the microstructure; and (iii) X-ray computed tomography microscopy to determine the morphology of microscale pores and mercury intrusion porosimetry to measure the volume fraction of the nanoscale pores. The combined use of micro- and macro-scale characterization tools can establish a logical link between the macro-mechanics, microstructure, and micromechanical properties, which provides valuable information aiding the material design of AASC with nanoparticles.

• 出版日期2018-2
• 单位深圳大学