Abstract
A binary geopolymer in the basis of fly ash and ceramic residue was developed under ambient temperature. The alkali medium comprises of commercial Na2SiO3 and NaOH with 10 M dan 12 M. Analyses were carried out to characterize the raw materials and their geopolymer properties. characterization was conducted through X-ray Diffraction (XRD), X-ray Fluorescence (XRF), Scanning Electron Microscope (SEM). The compressive strength, porosity and abrasion rates were measured for determining geopolymer performance. The ceramic residue consists mainly of SiO2 and Al2O3, which is similar to the fly ash. The highest compressive strength produced from the specimens was at 25.2 MPa with the age of 28 days, which complies with class 1 in standard SNI 03-0349-1989. This highest strength was followed by the lowest water absorption and abrasion rate, which are at 1.99% and 0.007 mm/minute, respectively.
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