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Title: Investigation of Three-Dimensional Microstructure of Tricalcium Silicate (C 3S) by Electron Microscopy

A serial block-face scanning electron microscopy (SBFSEM) system, composed of a scanning electron microscope (SEM) and an ultra-microtome installed within the SEM vacuum chamber, has been used to characterize the three-dimensional (3D) microstructure of tricalcium silicate (C 3S) grains embedded in epoxy resin. A selection of C 3S grains were segmented and rendered with 3D-image processing software, which allowed the C 3S grains to be clearly visualized and enabled statistically quantitative analysis. The results show that about 5% of the C 3S grains have volumes larger than 1 μm 3 and the average volume of the grains is 25 μm 3. Pores can also be clearly seen in the biggest C 3S grain, the volume of which is 3.6 × 10 4 μm 3, and the mean volume and total volume of all the pores within this grain are 4.8 μm 3 and 3.0 × 10 3 μm 3, respectively. This work provides a new approach for the characterization of the 3D spatial structure of raw C 3S materials, and the resulting 3D structure of the raw C 3S is important for further systematic research on the relationships between the spatial microstructure and the hydration kinetics of C 3S andmore » other cement minerals.« less
Authors:
 [1] ;  [2] ;  [1] ;  [1] ;  [2] ; ORCiD logo [3] ; ORCiD logo [4]
  1. Tongji Univ., Shanghai (China). School of Materials Science and Engineering
  2. Tongji Univ., Shanghai (China). School of Materials Science and Engineering and Key Lab. of Advanced Civil Engineering Materials
  3. Tongji Univ., Shanghai (China). School of Materials Science and Engineering; Univ. College London (United Kingdom). London Center for Nanotechnology; Brookhaven National Lab. (BNL), Upton, NY (United States). Condensed Matter Physics and Materials Science
  4. Tongji Univ., Shanghai (China). School of Materials Science and Engineering; Univ. College London (United Kingdom). London Center for Nanotechnology
Publication Date:
Report Number(s):
BNL-206807-2018-JAAM
Journal ID: ISSN 1996-1944; MATEG9
Grant/Contract Number:
SC0012704; 152221; 152243; 51102181; 18PJ1410400
Type:
Accepted Manuscript
Journal Name:
Materials
Additional Journal Information:
Journal Volume: 11; Journal Issue: 7; Journal ID: ISSN 1996-1944
Publisher:
MDPI
Research Org:
Brookhaven National Laboratory (BNL), Upton, NY (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); National Natural Science Foundation of China (NNSFC); Shanghai Pujiang Talent Program
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; serial block-face scanning electron microscopy (SBFSEM); three-dimensional (3D) structure; porosity; tricalcium silicate (C3S)
OSTI Identifier:
1459169