Effect of Sodium Aluminate on the Fresh and Hardened Propertiesof Fly Ash-Based One-Part Geopolymer

Archives of Metallurgy and Materials

article

Ooi Wan-En¹  Liew Yun-Ming¹  Heah Cheng Yong²  Ho Li-Nge²  Mohd Mustafa Al Bakri Abdullah¹  Ong Shee-Ween¹  Andrei Victor Sandu⁵ 

[1] Universiti Malaysia Perlis ,(UniMAP), Center of Excellence Geopolymer and Green Technology;Universiti Malaysia Perlis ,(UniMAP), Faculty of Chemical Engineering Technology;Universiti Malaysia Perlis ,(UniMAP), Faculty of Mechanical Engineering Technology;Universiti Malaysia Perlis ,(UniMAP), Centre of Excellence Frontier Materials Research;Gheorghe Asachi Technical University of Iasi, Faculty of Materials Science and Engineering

关键词: Geopolymer;    One-part geopolymer;    Fly ash;    Sodium Aluminate;    Sodium Metasilicate;   

DOI  :  10.24425/amm.2022.137775

学科分类：物理（综合）

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The one-part geopolymer binder was synthesis from the mixing of aluminosilicate material with solid alkali activators.The properties of one-part geopolymers vary according to the type and amount of solid alkali activators used. This paper presentsthe effect of various sodium metasilicate-to-sodium aluminate (NaAlO2/Na2SiO3) ratios on fly ash-based one-part geopolymer.The NaAlO2/Na2SiO3 ratios were set at 1.0 to 3.0. Setting time of fresh one-part geopolymer was examined through Vicat needleapparatus. Mechanical and microstructural properties of developed specimens were analysed after 28 days of curing in ambientcondition. The study concluded that an increase in NaAlO2 content delayed the setting time of one-part geopolymer paste. The highest compressive strength was achieved at the NaAlO2/Na2SiO3 ratio of 2.5, which was 33.65 MPa. The microstructural analysisrevealed a homogeneous structure at the optimum ratio. While the sodium aluminium silicate hydrate (N-A-S-H) and anorthitephases were detected from the XRD analysis.

【 授权许可】

CC BY-NC