Early-age mechanical properties and microstructures of Portland cement mortars containing different admixtures exposed to seawater
SCIE
SCOPUS
Cited 12 time in
WEB OF SCIENCE
Cited 13 time in
Scopus
-
Title
- Early-age mechanical properties and microstructures of Portland cement mortars containing different admixtures exposed to seawater
-
Author(s)
- Choi, Seoung Ik; Park, Jun Kil; Han, Taek Hee; Pae, Junil; Moon, Juhyuk; Kim, Min Ook
- KIOST Author(s)
- Choi, Seoung Ik(최성익); Park, Jun Kil(박준길); Han, Taek Hee(한택희)
-
Alternative Author(s)
- 최성익; 박준길; 한택희
-
Publication Year
- 2022-06
-
Abstract
- This study investigated the effects of seawater exposure on the mechanical, durability, and microstructural properties of cement mortars, which contained silica fume, metakaolin, or glass powder at two different replacement ratios. Test variables included the exposure conditions, exposure periods, supplementary cementitious material types, and replacement ratios. Compressive, flexural, and pull-off strengths were measured periodically. Mass change, water absorption, and rapid chloride permeability tests were conducted to evaluate the durability performance of Portland cement mortars (PCMs). Microcomputed tomography was utilized to obtain the pore information from representative PCMs. Test results revealed that seawater exposure yielded positive effects, including flexural strength and durability improvements during short-term exposure periods while those effects might not be last for long period. Metakaolin was the most effective supplementary cementitious material to minimize the reduction in compressive strength, while silica fume contributed to durability improvements. On the other hand, PCM containing GP did not show significant changes in strength and durability. Strong correlations between the flexural strength and durability were observed, and it was explained by additional hydration (i.e., matrix densification) of PCMs (except for the GP) due to the seawater curing which filled specific size of pores ranging 50–200 µm. © 2022 The Authors
-
ISSN
- 2214-5095
-
URI
- https://sciwatch.kiost.ac.kr/handle/2020.kiost/42435
-
DOI
- 10.1016/j.cscm.2022.e01041
-
Bibliographic Citation
- Case Studies in Construction Materials, v.16, 2022
-
Publisher
- Elsevier Ltd
-
Keywords
- Microcomputer tomography; Seawater exposure; Supplementary cementitious material; Durability; Mechanical property
-
Type
- Article
-
Language
- English
-
Document Type
- Article
- Files in This Item:
-
There are no files associated with this item.
Items in ScienceWatch@KIOST are protected by copyright, with all rights reserved, unless otherwise indicated.