Acid and sulfate resistance of seawater based alkali activated fly ash: A sustainable and durable approach

Salman Siddique; Jeong Gook Jang

doi:10.1016/j.conbuildmat.2021.122601

Acid and sulfate resistance of seawater based alkali activated fly ash: A sustainable and durable approach

Salman Siddique, Jeong Gook Jang^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

70 Scopus citations

Abstract

The present study investigates the microstructure and durability of alkali-activated fly ash made with seawater against acid and sulfate attacks. Seawater along with pure water and tap water was used as solvent to produce alkali-activated fly ash. Investigations were carried out to examine the effects of 3% acidic and 3% sulfate environments on the properties of alkali-activated fly ash. MIP, XRD, FT-IR and ²⁹Si NMR were employed to observe the microstructure and chemical properties of samples. The durability of alkali-activated fly ash made with seawater was primarily governed by the refined microstructure and presence of calcium chloride. From a microstructural perspective, alkali-activated fly ash made with seawater presented enhanced resistance to adverse conditions, as indicated by the corresponding higher Si/Al ratio.

Original language	English
Article number	122601
Journal	Construction and Building Materials
Volume	281
DOIs	https://doi.org/10.1016/j.conbuildmat.2021.122601
State	Published - 26 Apr 2021
Externally published	Yes

Bibliographical note

Publisher Copyright:
© 2021 Elsevier Ltd

Keywords

Acid resistance
Alkali-activated material
Fly ash
Microstructure
Seawater
Sulfate resistance

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction
General Materials Science

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10.1016/j.conbuildmat.2021.122601

Cite this

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title = "Acid and sulfate resistance of seawater based alkali activated fly ash: A sustainable and durable approach",

abstract = "The present study investigates the microstructure and durability of alkali-activated fly ash made with seawater against acid and sulfate attacks. Seawater along with pure water and tap water was used as solvent to produce alkali-activated fly ash. Investigations were carried out to examine the effects of 3\% acidic and 3\% sulfate environments on the properties of alkali-activated fly ash. MIP, XRD, FT-IR and 29Si NMR were employed to observe the microstructure and chemical properties of samples. The durability of alkali-activated fly ash made with seawater was primarily governed by the refined microstructure and presence of calcium chloride. From a microstructural perspective, alkali-activated fly ash made with seawater presented enhanced resistance to adverse conditions, as indicated by the corresponding higher Si/Al ratio.",

keywords = "Acid resistance, Alkali-activated material, Fly ash, Microstructure, Seawater, Sulfate resistance",

author = "Salman Siddique and Jang, \{Jeong Gook\}",

note = "Publisher Copyright: {\textcopyright} 2021 Elsevier Ltd",

year = "2021",

month = apr,

day = "26",

doi = "10.1016/j.conbuildmat.2021.122601",

language = "English",

volume = "281",

journal = "Construction and Building Materials",

issn = "0950-0618",

publisher = "Elsevier Ltd.",

}

TY - JOUR

T1 - Acid and sulfate resistance of seawater based alkali activated fly ash

T2 - A sustainable and durable approach

AU - Siddique, Salman

AU - Jang, Jeong Gook

PY - 2021/4/26

Y1 - 2021/4/26

N2 - The present study investigates the microstructure and durability of alkali-activated fly ash made with seawater against acid and sulfate attacks. Seawater along with pure water and tap water was used as solvent to produce alkali-activated fly ash. Investigations were carried out to examine the effects of 3% acidic and 3% sulfate environments on the properties of alkali-activated fly ash. MIP, XRD, FT-IR and 29Si NMR were employed to observe the microstructure and chemical properties of samples. The durability of alkali-activated fly ash made with seawater was primarily governed by the refined microstructure and presence of calcium chloride. From a microstructural perspective, alkali-activated fly ash made with seawater presented enhanced resistance to adverse conditions, as indicated by the corresponding higher Si/Al ratio.

AB - The present study investigates the microstructure and durability of alkali-activated fly ash made with seawater against acid and sulfate attacks. Seawater along with pure water and tap water was used as solvent to produce alkali-activated fly ash. Investigations were carried out to examine the effects of 3% acidic and 3% sulfate environments on the properties of alkali-activated fly ash. MIP, XRD, FT-IR and 29Si NMR were employed to observe the microstructure and chemical properties of samples. The durability of alkali-activated fly ash made with seawater was primarily governed by the refined microstructure and presence of calcium chloride. From a microstructural perspective, alkali-activated fly ash made with seawater presented enhanced resistance to adverse conditions, as indicated by the corresponding higher Si/Al ratio.

KW - Acid resistance

KW - Alkali-activated material

KW - Fly ash

KW - Microstructure

KW - Seawater

KW - Sulfate resistance

UR - https://www.scopus.com/pages/publications/85101113538

U2 - 10.1016/j.conbuildmat.2021.122601

DO - 10.1016/j.conbuildmat.2021.122601

M3 - Article

AN - SCOPUS:85101113538

SN - 0950-0618

VL - 281

JO - Construction and Building Materials

JF - Construction and Building Materials

M1 - 122601

ER -

Acid and sulfate resistance of seawater based alkali activated fly ash: A sustainable and durable approach

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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