Nanostructural Deformation Analysis of Calcium Silicate Hydrate in Portland Cement Paste by Atomic Pair Distribution Functionopen access
- Authors
- Suzuki, Hiroshi; Bae, Sungchul; Kanematsu, Manabu
- Issue Date
- Apr-2016
- Publisher
- HINDAWI LTD
- Citation
- Advances in Materials Science and Engineering, v.2016, pp.1 - 6
- Indexed
- SCIE
SCOPUS
- Journal Title
- Advances in Materials Science and Engineering
- Volume
- 2016
- Start Page
- 1
- End Page
- 6
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/154841
- DOI
- 10.1155/2016/8936084
- ISSN
- 1687-8434
- Abstract
- The deformation of nanostructure of calcium silicate hydrate (C-S-H) in Portland cement (PC) paste under compression was characterized by the atomic pair distribution function (PDF), measured using synchrotron X-ray diffraction. The PDF of the PC paste exhibited a unique deformation behavior for a short-range order below 2.0 nm, close to the size of the C-S-H globule, while the deformation for a long-range order was similar to that of a calcium hydroxide phase measured by Bragg peak shift. The compressive deformation of the C-S-H nanostructure was comprised of three stages with different interactions between globules. This behavior would originate from the granular nature of C-S-H, which deforms with increasing packing density by slipping the interfaces between globules, rearranging the overall C-S-H nanostructure. This new approach will lead to increasing applications of the PDF technique to understand the deformation mechanism of C-S-H in PC-based materials.
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