Properties and Morphology of Fly Ash Based Alkali Activated Material (AAM) Paste Under Steam Curing Condition

• Autorzy: Razak Rafiza Abd , Izman Sharifah Nur Syamimi Syed , Abdullah Mohd Mustafa Al Bakri , Yahya Zarina , Abdullah Alida , Mohamed Rosnita

Identyfikatory

DOI

10.24425/amm.2023.142462

• Języki publikacji: EN

Abstrakty

EN

This paper details the properties, microstructures, and morphologies of the fly ash-based alkali-activated material (AAM), also known as geopolymers, under various steam curing temperatures. The steam curing temperature result in subsequent high strengths relative to average curing temperatures. However, detailed studies involving the use of steam curing for AAM remain scarce. The AAM paste was prepared by mixing fly ash with an alkali activator consisting of sodium silicate (Na2SiO3) and sodium hydroxide (NaOH). The sample was steam cured at 50°C, 60°C, 70°C, and 80°C, and the fresh paste was tested for its setting time. The sample also prepared for compressive strength, density, and water absorption testings. It was observed that the fastest time for the fly ash geopolymer to start hardening was at 80°C at only 10 minutes due to the elevated temperature quickening the hydration of the paste. The compressive strength of the AAM increased with increasing curing time from 3 days to 28 days. The AAM’s highest compressive strength was 61 MPa when the sample was steam cured at 50°C for 28 days. The density of AAM was determined to be ~2122 2187 kg/m³, while its water absorption was ~6.72-8.82%. The phase analyses showed the presence of quartz, srebrodolskite, fayalite, and hematite, which indirectly confirms Fe and Ca’s role in the hydration of AAM. The morphology of AAM steam-cured at 50°C showed small amounts of unreacted fly ash and a denser matrix, which resulted in high compressive strength.

Słowa kluczowe

EN

alkali activated material; AAM; geopolymer; fly ash; steam-cured; high-Fe

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2023
• Tom: Vol. 68, iss. 2
• Strony: 785--789
• Opis fizyczny: Bibliogr. 24 poz., fot., rys., tab.

Twórcy

autor

Razak Rafiza Abd

• Universiti Malaysia Perlis, Geopolymer and Green Technology, Center of Excellence (CEGeoGTech), Kangar, Malaysia
• Universiti Malaysia Perlis (UniMAP), Faculty of Civil Engineering Technology, Perlis, Malaysia

• https://orcid.org/0000-0001-5499-8564

autor

Izman Sharifah Nur Syamimi Syed

• Universiti Malaysia Perlis (UniMAP), Faculty of Civil Engineering Technology, Perlis, Malaysia

• https://orcid.org/0000-0002-0947-7660

autor

Abdullah Mohd Mustafa Al Bakri

• Universiti Malaysia Perlis, Geopolymer and Green Technology, Center of Excellence (CEGeoGTech), Kangar, Malaysia

• https://orcid.org/0000-0002-9779-8586

autor

Yahya Zarina

• Universiti Malaysia Perlis, Geopolymer and Green Technology, Center of Excellence (CEGeoGTech), Kangar, Malaysia
• Universiti Malaysia Perlis (UniMAP), Faculty of Civil Engineering Technology, Perlis, Malaysia

• https://orcid.org/0000-0003-1144-4945

autor

Abdullah Alida

• Universiti Malaysia Perlis, Geopolymer and Green Technology, Center of Excellence (CEGeoGTech), Kangar, Malaysia

• https://orcid.org/0000-0002-8274-0365

autor

Mohamed Rosnita

• Universiti Malaysia Perlis, Geopolymer and Green Technology, Center of Excellence (CEGeoGTech), Kangar, Malaysia

• https://orcid.org/0000-0003-0778-9246

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Uwagi

The author is grateful and acknowledges the support from the Fundamental Research Grant Scheme (FRGS) 2019 under the grant number 9003-00747 (FRGS/1/2019/TK06/UNIMAP/02/1) from the Ministry of Higher Education Malaysia. The author also would like to acknowledge Geopolymer & Green Technology, Center of Excellence, Universiti Malaysia Perlis (UniMAP) for providing equipment and laboratory in this project. The author is also grateful to the Faculty of Civil Engineering Technology staff for the cooperation given and assistance in the research.