The bond between geopolymer repair mortars and OPC concrete substrate: Strength and microscopic interactions

Yan Shuai Wang; Kai Di Peng; Yazan Alrefaei; Jian Guo Dai

doi:10.1016/j.cemconcomp.2021.103991

The bond between geopolymer repair mortars and OPC concrete substrate: Strength and microscopic interactions

Yan Shuai Wang, Kai Di Peng, Yazan Alrefaei, Jian Guo Dai

Research output: Journal article publication › Journal article › Academic research › peer-review

42 Citations (Scopus)

Abstract

Geopolymer binders have good potential in the repair of existing concrete structures due to their superior durability and mechanical performances. Understanding the interfacial transition zone (ITZ) between geopolymer mortars and ordinary Portland cement concrete is a crucial step to implement such an environmentally-friendly technology. This paper focuses on the failure modes of the bond interface and the microscopic and chemical interactions between various geopolymer mortars and concrete substrates at ITZs. The occurrence of newly-formed gels and second hydration mechanisms at ITZs are analyzed and discussed.

Original language	English
Article number	103991
Journal	Cement and Concrete Composites
Volume	119
DOIs	https://doi.org/10.1016/j.cemconcomp.2021.103991
Publication status	Published - May 2021

Keywords

Alkali-activated binders
Bond strength
Interfacial transition zone (ITZ)
Strengthening

ASJC Scopus subject areas

Building and Construction
Materials Science(all)

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10.1016/j.cemconcomp.2021.103991

Cite this

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title = "The bond between geopolymer repair mortars and OPC concrete substrate: Strength and microscopic interactions",

abstract = "Geopolymer binders have good potential in the repair of existing concrete structures due to their superior durability and mechanical performances. Understanding the interfacial transition zone (ITZ) between geopolymer mortars and ordinary Portland cement concrete is a crucial step to implement such an environmentally-friendly technology. This paper focuses on the failure modes of the bond interface and the microscopic and chemical interactions between various geopolymer mortars and concrete substrates at ITZs. The occurrence of newly-formed gels and second hydration mechanisms at ITZs are analyzed and discussed.",

keywords = "Alkali-activated binders, Bond strength, Interfacial transition zone (ITZ), Strengthening",

author = "Wang, {Yan Shuai} and Peng, {Kai Di} and Yazan Alrefaei and Dai, {Jian Guo}",

note = "Funding Information: The authors would like to acknowledge the financial support received from the Hong Kong-Guangzhou Technology and Innovation Partnership Program (Project No. 201807010055), Hong Kong RGC General Research Fund (Project No. 15219919) National Science Foundation of China (NSFC) (Project No. 51638008), the Hong Kong Polytechnic University Ph.D. studentship awarded to the second author, and finally, the Hong Kong Ph.D. Fellowship Scheme (HKPFS) awarded to the third author. Publisher Copyright: {\textcopyright} 2021 Copyright: Copyright 2021 Elsevier B.V., All rights reserved.",

year = "2021",

month = may,

doi = "10.1016/j.cemconcomp.2021.103991",

language = "English",

volume = "119",

journal = "Cement and Concrete Composites",

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T2 - Strength and microscopic interactions

AU - Wang, Yan Shuai

AU - Peng, Kai Di

AU - Alrefaei, Yazan

AU - Dai, Jian Guo

N1 - Funding Information: The authors would like to acknowledge the financial support received from the Hong Kong-Guangzhou Technology and Innovation Partnership Program (Project No. 201807010055), Hong Kong RGC General Research Fund (Project No. 15219919) National Science Foundation of China (NSFC) (Project No. 51638008), the Hong Kong Polytechnic University Ph.D. studentship awarded to the second author, and finally, the Hong Kong Ph.D. Fellowship Scheme (HKPFS) awarded to the third author. Publisher Copyright: © 2021 Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

PY - 2021/5

Y1 - 2021/5

N2 - Geopolymer binders have good potential in the repair of existing concrete structures due to their superior durability and mechanical performances. Understanding the interfacial transition zone (ITZ) between geopolymer mortars and ordinary Portland cement concrete is a crucial step to implement such an environmentally-friendly technology. This paper focuses on the failure modes of the bond interface and the microscopic and chemical interactions between various geopolymer mortars and concrete substrates at ITZs. The occurrence of newly-formed gels and second hydration mechanisms at ITZs are analyzed and discussed.

AB - Geopolymer binders have good potential in the repair of existing concrete structures due to their superior durability and mechanical performances. Understanding the interfacial transition zone (ITZ) between geopolymer mortars and ordinary Portland cement concrete is a crucial step to implement such an environmentally-friendly technology. This paper focuses on the failure modes of the bond interface and the microscopic and chemical interactions between various geopolymer mortars and concrete substrates at ITZs. The occurrence of newly-formed gels and second hydration mechanisms at ITZs are analyzed and discussed.

KW - Alkali-activated binders

KW - Bond strength

KW - Interfacial transition zone (ITZ)

KW - Strengthening

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U2 - 10.1016/j.cemconcomp.2021.103991

DO - 10.1016/j.cemconcomp.2021.103991

M3 - Journal article

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SN - 0958-9465

VL - 119

JO - Cement and Concrete Composites

JF - Cement and Concrete Composites

M1 - 103991

ER -

The bond between geopolymer repair mortars and OPC concrete substrate: Strength and microscopic interactions

Abstract

Keywords

ASJC Scopus subject areas

More information

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