Paper Title:
Optimization of Alkaline Activator/Fly ASH Ratio on the Compressive Strength of Manufacturing Fly ASH-BASED Geopolymer

Fly ash and a mixture of alkaline activators namely sodium silicate (Waterglass) and sodium hydroxide (NaOH) solution were used for preparing geopolymer. The aim of this research is to determine the optimum value of the alkaline activator/fly ash ratio. The effect of the oxide molar ratios of SiO2/Al2O3, water content of the alkaline activator and the Waterglass% content were studied for each Alkaline activator/fly ash ratio. The geopolymers were synthesized by the activation of fly ash with alkaline solution at three different alkaline activator/fly ash ratios which were 0.3, 0.35, and 0.4 at a specific constant ratio of waterglass/NaOH solution of 1.00. The geopolymers were cured at 70°C for 24 h and cured to room temperature. Results revealed that the alkaline activator/fly ash ratio of 0.4 has the optimum amount of alkaline liquid, which shows the highest rate of geopolymerization compared to other ratios. A high strength of 8.61 MPa was achieved with 0.4 of activator/fly ash ratio and 14% of waterglass content.

Chapter 3: Powder Metallurgy and Ceramic Forming
Edited by
Wu Fan
Abdullah Mohd Mustafa Al Bakri et al., 2011, Applied Mechanics and Materials, 110-116, 734
Online since
October 2011
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Authors: M. M. A. Abdullah, H. Kamarudin, M. Bnhussain, I. Khairul Nizar, A.R. Rafiza, Y. Zarina
Chapter 2: Material Science and Technology
Abstract:Geopolymer, produced by the reaction of fly ash with an alkaline activator (mixture of Na2SiO3 and NaOH solutions), is...
Authors: Abdullah Mohd Mustafa Al Bakri, H. Kamarudin, I. Khairul Nizar, M. Bnhussain, Y. Zarina, A.R. Rafiza
Abstract:Geopolymer requires an alkaline activator to induce it pozzolanic property and to accelerate the geopolymerisation process. The...
Authors: Abdullah Mohd Mustafa Al Bakri, Hussin Kamarudin, Mohammed Binhussain, Ismail Khairul Nizar, Rafiza Abd Razak, Yahya Zarina
Chapter 13: Polymeric Materials
Abstract:The compressive strength and microstructural characteristics of fly ash based geopolymer with alkaline activator solution were investigated....
Authors: Omar A. Abdulkareem, Abdullah Mohd Mustafa Al Bakri, Hussen Kamarudin, Ismail Khairul Nizar
Chapter 1: Materials Design
Abstract:Omar A. Abdulkareem1a, A.M. Mustafa Al Bakri1b, H. Kamarudin1c, and I. Khairul Nizar2d 1Center of Excellence Geopolymer System Research,...