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4320937 
Journal Article 
Sulfuric acid resistance of blended ash geopolymer concrete 
Ariffin, MAM; Bhutta, MAR; Hussin, MW; Tahir, MM; Aziah, Nor 
2013 
Yes 
Construction and Building Materials
ISSN: 0950-0618
EISSN: 1879-0526 
43 
80-86 
WOS:000319232900008 
This study presents an investigation into the durability of geopolymer concrete prepared using blended ash of pulverized fuel ash (PFA) and palm oil fuel ash (POFA) along with alkaline activators when exposed to 2% solution of sulfuric acid for up to 18 months. Ordinary Portland Cement (OPC) concrete was also prepared as control concrete. The main parameters studied were the evaluation of mass, compressive strength, products of degradation and microstructural changes. The deterioration was examined using X-ray diffraction (XRD), Fourier transform infrared (FTIR), thermogravimetry (TGA/DTG), scanning electron microscopy (SEM). The results of geopolymer and OPC concretes were compared and discussed. The performance of geopolymer concrete when exposed to 2% sulfuric acid solution for more than a year was superior to OPC concrete which is attributed to a more stable cross-linked aluminosilicate polymer structure formed in the geopolymer concrete. (C) 2013 Elsevier Ltd. All rights reserved. 
Alkaline solution; Blended ash; Compressive strength; Geopolymer concrete; Microstructure; Sulfuric acid