Journal Published Online: 14 August 2019
Volume 48, Issue 3

A Comparative Study on the Influence of Supplementary Cementitious Materials on Marine Concrete

CODEN: JTEVAB

Abstract

In this study, the influences of fly ash, ground granulated blast furnace slag (GGBS), silica fume (SF), and metakaolin (MK) on seawater resistance of cement-based materials are investigated and compared. The obtained results revealed that calcium hydroxide and ettringite (AFt) in matrix are dissolved completely during seawater immersion, whereas Friedel’s salt and brucite are deposited in pores. Seawater corrosion enlarges the capillary pores, increasing the critical pore size and capillary pore volume, resulting in decreased permeability of the matrix. SF and MK effectively contribute to pore refinement and exhibit less water-induced degradation at the early stage. GGBS and MK possess active aluminum, which transforms into AFt during interactions with seawater. Employment of MK maintains the stability of ettringite to some degree.

Author Information

Li, Xiaosheng
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, China
Shui, Zhonghe
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China
Huang, Yun
School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, China
Gao, Xu
School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan, China
Chen, Jie
State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan, China School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, China
Pages: 11
Price: $25.00
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Details
Stock #: JTE20190138
ISSN: 0090-3973
DOI: 10.1520/JTE20190138