Scientific Research and Essays

  • Abbreviation: Sci. Res. Essays
  • Language: English
  • ISSN: 1992-2248
  • DOI: 10.5897/SRE
  • Start Year: 2006
  • Published Articles: 2732

Full Length Research Paper

Resistance to sodium sulfate attack of plain and blended cement containing corncob ash and ground granulated blast furnace slag

  Hanifi Binici1*, Huseyin Zengin2, Gulay Zengin2, Hasan Kaplan3 and Faruk Yucegok1          
  1Faculty of Engineering and Architecture, Department of Civil Engineering, Kahramanmaras Sutcu Imam University, Kahramanmaras 46100, Turkey. 2Faculty of Science and Literature, Department of Chemistry, Kahramanmaras Sutcu Imam University, Kahramanmaras 46100, Turkey. 3Faculty of Engineering, Department of Civil Engineering, Pamukkale University, Denizli 20070, Turkey.
Email: [email protected]

  • Article Number - 686A9DC24309
  • Vol.4(2), pp. 098-106, February 2009
  •  Accepted: 15 January 2009
  •  Published: 28 February 2009

Abstract

 

In this study blended cements containing corncob ash (CA) and ground granulated blast furnace slag (GGBFS) were investigated. The blended cements were prepared using a clinker, 5% gypsum by weight CA and GGBFS. Different amounts of additives (20 and 40%) were incorporated into these blends in equal amounts. Control cement, that is, plain Portland cement, without any additions, was also prepared and studied in order to establish the effects of additives to cement. Clinkers from Adana, Cimsa and Mardin were used. CA was obtained by burning corncob waste and had a 500 m²/kg Blaine value, and GGBFS was ground to give a Blaine value of 300 m²/kg for all cements. The compressive strengths were measured for 3, 7, 28, 90, and 180 days in tap water. Their sulfate resistance was determined by compressive strengths after 24 months under sulfate conditions. CA and GGBFS gave an activity index grades of 80 and 71%, respectively. The microstructures and morphology of plain and blended cements were studied by scanning electron microscopy. The micrographs showed that these additives provide more condense structures of cement hydration and excellent sulfate resistance. Thus, CA and GGBFS additives in cement production can contribute to the cement durability.

 

Key words: Blended cements, corncob ash, ground granulated blast furnace slag, sulfate.

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