166 0

Pore structure refinement of cement paste incorporating nanosilica: Study with dual beam scanning electron microscopy/focused ion beam (SEM/FIB)

Title
Pore structure refinement of cement paste incorporating nanosilica: Study with dual beam scanning electron microscopy/focused ion beam (SEM/FIB)
Author
이한승
Keywords
Nanosilica; Scanning electron microscopy (SEM)/focused ion beam (FIB); 3D pore structure; Cement paste
Issue Date
2018-11
Publisher
ELSEVIER SCIENCE INC
Citation
MATERIALS CHARACTERIZATION, v. 145, Page. 323-328
Abstract
Pozzolanic materials, micro- and nano-, have been found to improve the durability properties of cement-based materials by refining their pore structure. As a relatively newer material, the modifying effects of nanosilica on pore structure are still inconclusive in the literature. In this study, this was characterized by implementing dual beam SEM/FIB, which can generate 3D models of porous materials for quantitative analysis. The sample is milled by focused ion beam layer-by-layer, and each surface layer is 2D imaged via scanning electron microscopy. Three types of pores - large capillary pore, medium capillary pore and gel pore - can be observed. A 3D pore structure model is then reconstructed from 1000 of these 2D images, from which porosity and pore size distribution can be calculated. Cement pastes incorporating nanosilica and silica fume were compared. The porosity and pore diameter were found to decrease with the inclusion of nanosilica. Furthermore, reduction in capillary pores and subsequent increase in gel pores were also observed.
URI
https://www.sciencedirect.com/science/article/pii/S1044580318312415https://repository.hanyang.ac.kr/handle/20.500.11754/98804
ISSN
1044-5803; 1873-4189
DOI
10.1016/j.matchar.2018.08.045
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ARCHITECTURE(건축학부) > Articles
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML


qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE