Effect of NaOH Solution on Mechanical Properties and Morphology of Fly Ash Based Cold-Pressed Geopolymer

• Autorzy: Shee-Ween Ong , Cheng-Yong Heah , Abdullah Mohd Mustafa Al Bakri , Wan-En Ooi , Yong-Jie Hang , Hoe-Woon Tee , Jia-Ni Lim

Identyfikatory

DOI

10.24425/amm.2024.151399

• Języki publikacji: EN

Abstrakty

EN

Cold-pressing method is beneficial in reducing the porosity of geopolymer matrix, but the low liquid volume will result in unreacted aluminosilicate materials. This problem can be resolved by increasing sodium hydroxide (NaOH) concentration. This paper thus investigates the effect of NaOH concentration on the properties of cold-pressed geopolymer. The fly ash was activated by sodium silicate (Na₂SiO₃) and 10, 12, 14 and 16 M of NaOH solution. The dry mix was compacted with a uniaxial hydraulic press and cured for 7 and 28 days. The specimens were measured by porosity and compressive strength measurements. Scanning electron microscopy (SEM) analysis was performed to determine the microstructure of specimens. The geopolymer was optimized at 14 M NaOH with the highest 28-day compressive strength (109.6 MPa) and lowest porosity (8.1%). The SEM micrographs proved that the geopolymer have a dense and compact microstructure.

Słowa kluczowe

EN

cold pressing; NaOH concentration; porosity; mechanical properties; morphology

• 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: 2024
• Tom: Vol. 69, iss. 4
• Strony: 1353--1357
• Opis fizyczny: Bibliogr. 12 poz., fot., rys., wzory

Twórcy

autor

Shee-Ween Ong

• Universiti Malaysia Perlis (UniMAP), Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), 01000 Kangar, Perlis, Malaysia
• Universiti Malaysia Perlis (UniMAP), Faculty of Chemical Engineering Technology, 02600 Arau, Perlis, Malaysia

• https://orcid.org/0000-0003-0256-6916

autor

Cheng-Yong Heah

• Universiti Malaysia Perlis (UniMAP), Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), 01000 Kangar, Perlis, Malaysia
• Universiti Malaysia Perlis (UniMAP), Faculty of Mechanical Engineering Technology 02600 Arau, Perlis, Malaysia

• https://orcid.org/0000-0001-7093-7833

autor

Abdullah Mohd Mustafa Al Bakri

• Universiti Malaysia Perlis (UniMAP), Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), 01000 Kangar, Perlis, Malaysia
• Universiti Malaysia Perlis (UniMAP), Faculty of Chemical Engineering Technology, 02600 Arau, Perlis, Malaysia

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

autor

Wan-En Ooi

• Universiti Malaysia Perlis (UniMAP), Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), 01000 Kangar, Perlis, Malaysia
• Universiti Malaysia Perlis (UniMAP), Faculty of Chemical Engineering Technology, 02600 Arau, Perlis, Malaysia

• https://orcid.org/0000-0002-6541-4672

autor

Yong-Jie Hang

• Universiti Malaysia Perlis (UniMAP), Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), 01000 Kangar, Perlis, Malaysia
• Universiti Malaysia Perlis (UniMAP), Faculty of Chemical Engineering Technology, 02600 Arau, Perlis, Malaysia

• https://orcid.org/0000-0001-8170-4285

autor

Hoe-Woon Tee

• Universiti Malaysia Perlis (UniMAP), Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), 01000 Kangar, Perlis, Malaysia
• Universiti Malaysia Perlis (UniMAP), Faculty of Mechanical Engineering Technology 02600 Arau, Perlis, Malaysia

• https://orcid.org/0000-0003-3183-8968

autor

Jia-Ni Lim

• Universiti Malaysia Perlis (UniMAP), Geopolymer and Green Technology, Centre of Excellence (CEGeoGTech), 01000 Kangar, Perlis, Malaysia
• Universiti Malaysia Perlis (UniMAP), Faculty of Chemical Engineering Technology, 02600 Arau, Perlis, Malaysia

• https://orcid.org/0000-0002-4049-9884

Bibliografia

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Uwagi

The authors sincerely acknowledge the support by Fundamental Research Grant Scheme (FRGS/1/2020/TK0/UNIMAP/02/42) from the Ministry of Higher Education, Malaysia.