Nanoindentation and SEM/EDX characterization of the geopolymer-to-steel interfacial transition zone for a reactive porcelain enamel coating

被引：39

作者：

Allison, P. G. ^{[1
]}

Weiss, C. A., Jr. ^{[2
]}

Moser, R. D. ^{[2
]}

Diaz, A. J. ^{[3
]}

Rivera, O. G. ^{[1
]}

Holton, S. S. ^{[2
]}

机构：

[1] Univ Alabama, Dept Mech Engn, Tuscaloosa, AL 35406 USA

[2] US Army Engineer Res & Dev Ctr, Geotech & Struct Lab, Vicksburg, MS 39180 USA

[3] Univ Puerto Rico, Dept Mech Engn, Mayaguez, PR 00680 USA

来源：

COMPOSITES PART B-ENGINEERING | 2015年 / 78卷

关键词：

Geopolymer; Interface/interphase; Mechanical properties; Chemical analysis; Electron microscopy; MECHANICAL-PROPERTIES; SURFACE-ROUGHNESS; CONCRETE;

D O I：

10.1016/j.compositesb.2015.03.011

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The increasing use of alternative cementitious materials such as geopolymers as an environmentally-friendly alternative to traditional cements requires an improved understanding of the interfacial transition zone (ITZ) between the matrix and reinforcing steels. In this study, nanoindentation measurements were spatially coupled to images with scanning electron microscopy and chemical composition using energy dispersive X-ray microanalysis. The study focused on the microstructure and chemical composition of the interfacial transition zone (ITZ) for reinforcing steel embedded in a geopolymer mortar. The ITZ was analyzed for uncoated steel and steel coated with a reactive porcelain enamel that improves bonding and corrosion resistance. Results indicate that a more gradual transition of mechanical properties and chemical composition for the coated steel coupled with improved integration to the mortar correlates to increased bond strength measured in macroscale experiments. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：131 / 137

页数：7

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