検索対象:     
報告書番号:
※ 半角英数字
 年 ~ 
 年

Determination of atomistic deformation of tricalcium silicate paste with high-volume fly ash

フライアッシュ高含有ケイ酸三カルシウムペーストに関する原子レベルの変形解析

Jee, H.*; Im, S.*; 兼松 学*; 鈴木 裕士  ; 諸岡 聡  ; 小山 拓*; 町田 晃彦*; Bae, S.*

Jee, H.*; Im, S.*; Kanematsu, Manabu*; Suzuki, Hiroshi; Morooka, Satoshi; Koyama, Taku*; Machida, Akihiko*; Bae, S.*

We examined the influence of incorporating high-volume fly ash (FA) on the atomic structure and deformation behavior of calcium silicate hydrates (C-S-H) in tricalcium silicate (C$$_{3}$$H) paste upon exposure to external forces. Atomic structural changes and strains under compressive load were assessed using synchrotron in situ high-energy X-ray scattering-based atomic pair distribution function (PDF) analysis. Three different strain types, namely macroscopic strains, measured by a gauge attached to the specimen, strain in reciprocal space, (Bragg peak shifts), and strain in real space (PDF peak shift), were compared. All monitored and calculated strains for C$$_{3}$$H-FA (50 wt.% FA) paste were compared with those of pure C$$_{3}$$H paste. In the range of $$r$$ $$<$$ 10 ${AA}$, PDF analysis showed that C$$_{3}$$H-FA had a similar atomic structure to synthetic C-S-H followed by pure C$$_{3}$$H paste. The atomic strain of C$$_{3}$$H-FA in real space ($$r$$ $$<$$ 20 ${AA}$) was smaller than that of C$$_{3}$$H under compression, which suggests that the incompressibility of C-S-H on an atomistic scale is enhanced by fly ash incorporation. This may be caused by increased silicate polymerization of C-S-H due to the additional silicate provided by the fly ash.

Access

:

- Accesses

InCites™

:

パーセンタイル:66.5

分野:Materials Science, Ceramics

Altmetrics

:

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.