Effect of Solids-To-Liquids, Na2SiO3-To-NaOH and Curing Temperature on the Palm Oil Boiler Ash (Si + Ca) Geopolymerisation System

Materials

Zarina Yahya⁴  Mohd Mustafa Al Bakri Abdullah²  Kamarudin Hussin⁴  Khairul Nizar Ismail¹  Rafiza Abd Razak⁴  Andrei Victor Sandu³ 

[1] School of Environmental Engineering, Universiti Malaysia Perlis (UniMAP), P.O. Box 77, D/A Pejabat Pos Besar, Kangar 01000, Perlis, Malaysia; E-Mail:;Faculty of Engineering Technology, Uniciti Alam Campus, Universiti Malaysia Perlis, Sungai Chuchuh 02100, Padang Besar, Perlis, Malaysia;Faculty of Materials Science and Engineering, Gheorghe Asachi Technical University of Iasi, Blvd. D. Mangeron 41, Iasi 700050, Romania; E-Mail:;Center of Excellence Geopolymer and Green Technology, School of Materials Engineering, Universiti Malaysia Perlis (UniMAP), P.O. Box 77, D/A Pejabat Pos Besar, Kangar 01000, Perlis, Malaysia; E-Mails:

关键词: POBA;    geopolymer;    alkaline activator;    NaOH;    sodium silicate;   

DOI  :  10.3390/ma8052227

来源: mdpi

【 摘 要 】

This paper investigates the effect of the solids-to-liquids (S/L) and Na₂SiO₃/NaOH ratios on the production of palm oil boiler ash (POBA) based geopolymer. Sodium silicate and sodium hydroxide (NaOH) solution were used as alkaline activator with a NaOH concentration of 14 M. The geopolymer samples were prepared with different S/L ratios (0.5, 1.0, 1.25, 1.5, and 1.75) and Na₂SiO₃/NaOH ratios (0.5, 1.0, 1.5, 2.0, 2.5, and 3.0). The main evaluation techniques in this study were compressive strength, X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscope (SEM). The results showed that the maximum compressive strength (11.9 MPa) was obtained at a S/L ratio and Na₂SiO₃/NaOH ratio of 1.5 and 2.5 at seven days of testing.

【 授权许可】

CC BY   
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