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Effect of binder proportion on compressive strength of geopolymer mortar
Date Issued
01-12-2008
Author(s)
Abstract
The objective of the present work is to find the joint influence of a series of factor (sand to fly ash ratio, activator solution to fly ash ratio, sodium silicate to NaOH ratio, concentration of NaOH solution, chemical composition and the workability) on the development of the compressive strength of the fly ash based geopolymer mortar. To reach this aim 64 mixes with different chemical compositions were developed and were studied. From the analysis of the experimental results it was found that the most significant factor was found to be the H2O to Na2O ratio. Mortars with maximum strength of 50- 60 MPa were obtained when the H2O to Na 2O ratio is in the range of 11-14. The next most significant factor was the workability of the mortar. The workability of the mortar was primilarly dependent on the sodium silicate to NaOH ratio and the concentration NaOH solution. Increase in this ratio showed decrease in strength and increase in the NaOH concentration resulted in increase of strength. Copyright ©2008 MS&T'08®.
Volume
3