The Influence Sugarcane Bagasse Ash and Metakaolin on Mechanical Properties Fly Ash Geopolymer Paste

Adhitya Satriawan Raharjo, Ilham Kurniawan, Gifary Maulan W., Yosi Noviari W., Sasmita Purwa H., Machsus Fawzi, Ridho Bayuaji


This paper present an optimization of sugarcane bagasse ash and metakaolin on fly ash geopolymer paste with sea water treatment. Mechanical properties were assessed by compressive strenght test (SNI 03-1974-2011), UPV test (ASTM C597 – 16), and  porosity test (ASTM C642-90). Na2SiO3 (Sodium Silicate) and NaOH (Sodium Hydroxide) with concentration of 12 Molar were used as alkali activators with ratio activator of 2,5. Percentage of fly ash and alkali used is 70% and 30%. Compressive strength test was conducted on binder 5cm x 5cm x 5cm with the age of 7, 14, 28 days, while UPV and Porosity test was performed in 28 days. Based on the compressive strength of 7-day-old concrete paste. It was found that the compressive strength of concrete paste used as a control was 21.3 MPa, V1 was 24.7 MPa, and V5 was 22.1 MPa. While at the age of concrete pasta 28 days. It was found that the compressive strength of the control was 49.6 MPa, V1 was 34.1 MPa, and V5 was 39.3 MPa. So it is assumed that those with the greatest compressive strength and the most stable are the controls (100% FA), V1(80% FA : 20% SGBA) and V5 (80% FA : 20% Metakaolin).


Geopolymer, Fly ash, Metakaolin, Sugarcane bagasse ash

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