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

Abstract

Highlights: • Combined advanced micro-scale measurements were used to predict properties of NS AASC. • NS enhances both the macro- and micro-mechanical properties of AASC. • Combination of MIP and XCT facilitates a complete characterization of pore structure. • Combined tools at multi-scale provide efficient approaches to optimize material design. - Abstract: The effect of nano-SiO{sub 2} 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.

Authors:
; ; ;  [1]
  1. Guangdong Provincial Key Laboratory of Durability for Marine Civil Engineering, Shenzhen Durability Center for Civil Engineering, College of Civil Engineering, Shenzhen University, Shenzhen 518060, Guangdong (China)
Publication Date:
OSTI Identifier:
22804887
Resource Type:
Journal Article
Journal Name:
Materials Characterization
Additional Journal Information:
Journal Volume: 136; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1044-5803
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; COMPUTERIZED TOMOGRAPHY; ELASTICITY; NANOPARTICLES; NANOSTRUCTURES; PORE STRUCTURE; SCANNING ELECTRON MICROSCOPY; SILICON OXIDES; SOLIDS; X-RAY SPECTROSCOPY

Citation Formats

Long, Wu-Jian, Xiao, Bing-Xu, Gu, Yu-Cun, and Xing, Feng. Micro- and macro-scale characterization of nano-SiO2 reinforced alkali activated slag composites. United States: N. p., 2018. Web. doi:10.1016/J.MATCHAR.2017.12.013.
Long, Wu-Jian, Xiao, Bing-Xu, Gu, Yu-Cun, & Xing, Feng. Micro- and macro-scale characterization of nano-SiO2 reinforced alkali activated slag composites. United States. https://doi.org/10.1016/J.MATCHAR.2017.12.013
Long, Wu-Jian, Xiao, Bing-Xu, Gu, Yu-Cun, and Xing, Feng. 2018. "Micro- and macro-scale characterization of nano-SiO2 reinforced alkali activated slag composites". United States. https://doi.org/10.1016/J.MATCHAR.2017.12.013.
@article{osti_22804887,
title = {Micro- and macro-scale characterization of nano-SiO2 reinforced alkali activated slag composites},
author = {Long, Wu-Jian and Xiao, Bing-Xu and Gu, Yu-Cun and Xing, Feng},
abstractNote = {Highlights: • Combined advanced micro-scale measurements were used to predict properties of NS AASC. • NS enhances both the macro- and micro-mechanical properties of AASC. • Combination of MIP and XCT facilitates a complete characterization of pore structure. • Combined tools at multi-scale provide efficient approaches to optimize material design. - Abstract: The effect of nano-SiO{sub 2} 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.},
doi = {10.1016/J.MATCHAR.2017.12.013},
url = {https://www.osti.gov/biblio/22804887}, journal = {Materials Characterization},
issn = {1044-5803},
number = ,
volume = 136,
place = {United States},
year = {2018},
month = {2}
}