期刊
CONSTRUCTION AND BUILDING MATERIALS
卷 281, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2021.122601
关键词
Seawater; Alkali-activated material; Fly ash; Acid resistance; Sulfate resistance; Microstructure
资金
- National Research Foundation of Korea (NRF) - Korea government (MSIT) [2018R1C1B6002093]
- National Research Foundation of Korea [4220200113581, 2018R1C1B6002093] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The present study found that alkali-activated fly ash made with seawater showed good durability against acid and sulfate attacks, primarily influenced by its microstructure and the presence of calcium chloride.
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 Si-29 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. (C) 2021 Elsevier Ltd. All rights reserved.
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