Microstructural Study of Hydration of C3S in the Presence of Calcium Nitrate Using Scanning Transmission X-Ray Microscopy (STXM)
Joint Authors
Li, Qinfei
Geng, Guoqing
Monteiro, Paulo J. M.
Wang, Yang
Chen, Heng
Hou, Pengkun
Cheng, Xin
Huang, Shifeng
Kim, Jae Hong
Source
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-04-22
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Calcium nitrate (CN) is used widely as an effectively inorganic setting accelerator and antifreeze admixture in concrete structures.
In this paper, the multiscale investigation of CN on the hydration of C3S was studied by scanning transmission X-ray microscopy (STXM) combined with near-edge X-ray absorption fine structure (NEXAFS), 29Si MAS NMR, calorimetry, scanning electron microscope, and N2 absorption.
It was concluded that the calcium silicate hydrate (C-S-H) surrounds the unhydrated C3S at 1-day hydrated C3S in the presence of calcium nitrate, while portlandite is partly in transformation and is formed partly.
Based on Ca L3,2-edge NEXAFS spectra for 1-day hydrated C3S particle, calcium nitrate does not change the structure of the asymmetrically 7-fold coordination of calcium in the C-S-H.
Calcium nitrate can accelerate the hydration of C3S to some extent and polymerization of the silicate chains within C-S-H considerably at early age, resulting in the increasing specific surface area.
American Psychological Association (APA)
Li, Qinfei& Wang, Yang& Geng, Guoqing& Chen, Heng& Hou, Pengkun& Cheng, Xin…[et al.]. 2020. Microstructural Study of Hydration of C3S in the Presence of Calcium Nitrate Using Scanning Transmission X-Ray Microscopy (STXM). Journal of Nanomaterials،Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1188577
Modern Language Association (MLA)
Li, Qinfei…[et al.]. Microstructural Study of Hydration of C3S in the Presence of Calcium Nitrate Using Scanning Transmission X-Ray Microscopy (STXM). Journal of Nanomaterials No. 2020 (2020), pp.1-9.
https://search.emarefa.net/detail/BIM-1188577
American Medical Association (AMA)
Li, Qinfei& Wang, Yang& Geng, Guoqing& Chen, Heng& Hou, Pengkun& Cheng, Xin…[et al.]. Microstructural Study of Hydration of C3S in the Presence of Calcium Nitrate Using Scanning Transmission X-Ray Microscopy (STXM). Journal of Nanomaterials. 2020. Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1188577
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1188577