Rafiza, A. R. and Bakri, A. M. Mustafa Al and Kamarudin, H. and Nizar, I. Khairul and Hardjito, Djwantoro (2015) Optimization of NaOH Molarity, LUSI Mud/Alkaline Activator, and Na2SiO3/NaOH Ratio to Produce Lightweight Aggregate-Based Geopolymer. International Journal of Molecular Sciences, 16 (5). pp. 11629-11647. ISSN 1422-0067
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Abstract
This paper presents the mechanical function and characterization of an artificial lightweight geopolymer aggregate (ALGA) using LUSI (Sidoarjo mud) and alkaline activator as source materials. LUSI stands for LU-Lumpur and SI-Sidoarjo, meaning mud from Sidoarjo which erupted near the Banjarpanji-1 exploration well in Sidoarjo, East Java, Indonesia on 27 May 2006. The effect of NaOH molarity, LUSI mud/Alkaline activator (LM/AA) ratio, and Na2SiO3/NaOH ratio to the ALGA are investigated at a sintering temperature of 950 °C. The results show that the optimum NaOH molarity found in this study is 12 M due to the highest strength (lowest AIV value) of 15.79% with lower water absorption and specific gravity. The optimum LUSI mud/Alkaline activator (LM/AA) ratio of 1.7 and the Na2SiO3/NaOH ratio of 0.4 gives the highest strength with AIV value of 15.42% with specific gravity of 1.10 g/cm3 and water absorption of 4.7%. The major synthesized crystalline phases were identified as sodalite, quartz and albite. Scanning Electron Microscope (SEM) image showed more complete geopolymer matrix which contributes to highest strength of ALGA produced.
Item Type: | Article |
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Uncontrolled Keywords: | artificial lightweight aggregate; geopolymer; aggregate impact value; SEM; X-ray Diffraction (XRD); Fourier Transform Infrared (FTIR) |
Subjects: | T Technology > TA Engineering (General). Civil engineering (General) |
Divisions: | Faculty of Civil Engineering and Planning > Civil Engineering Department |
Depositing User: | Admin |
Date Deposited: | 21 May 2015 23:15 |
Last Modified: | 30 Jul 2015 21:42 |
URI: | https://repository.petra.ac.id/id/eprint/21256 |
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