Development of Geopolymer from Pond Ash-Thermal Power Plant Waste

5Development of Pond Ash (PA)–High Carbon Ferrochrome (HCFC) Slag-Based Geopolymer Cementitious Materials

Muktikanta Panigrahi¹*, Ratan Indu Ganguly² and Radha Raman Dash³

¹PG Department of Materials Science, Maharaja Sriram Chandra Bhanja Deo University, Keonjhar Campus, Odisha, India

²Department of Metallurgical Engineering, National Institute of Technology, Raurkela, Odisha, India

³CSIR-National Metallurgical Laboratory, Jamshedpur, Jharkhand, India

Abstract

Pond ash (PA) is a reject of thermal power stations which contains silica (62.8%) and alumina (28.3%). However, these materials possess low-calcium. High-carbon ferrochrome (HCFC) slag has comparatively low silica (28%) as compared to the silica content of pond ash. Judicial mixing of these two materials is thought to be an important proposition for balancing alkali materials which help geopolymer (GP) formation have with good strength. In this century, researchers have put their efforts into geopolymer concrete. In this investigation, pond ash, high-carbon ferrochrome (HCFC) slag, sodium silicate and other ingredients, such as sodium hydroxide (NaOH) and water-soluble plasticizer (Sika), have been used to prepare novel GP products for use in heavy construction application(s). The mechanism involved in such polymer is that the silicon and the aluminum in the mixture of PA and HCFC slag react with an alkaline solution of sodium silicate, sand and aggregates with water-soluble plasticizer to form the geopolymer concrete ...