Development of Geopolymer from Pond Ash-Thermal Power Plant Waste

7Corrosion of Pond Ash (PA)-Based Geopolymer Products

Slipika Panda¹, Muktikanta Panigrahi²*, Ratan Indu Ganguly³ and Radha Raman Dash⁴

¹Department of Civil Engineering, Gandhi Institute of Engineering and Technology University, Gunupur, Odisha, India

²PG Department of Materials Science, Maharaja Sriram Chandra Bhanja Deo University, Keonjhar Campus, Odisha, India

³Department of Metallurgical Engineering, National Institute of Technology, Raurkela, Odisha, India

⁴CSIR-National Metallurgical Laboratory, Jamshedpur, Jharkhand, India

Abstract

The corrosion behavior of PA-based geopolymer mortar and concrete under different conditions (saline water, HCl solution, H₂SO₄ solution, H₃PO₄ solution, normal water, distilled water) is discussed in this chapter. Strength, morphology and thermal properties were compared for exposed and unexposed GP motor and concrete. The strengths obtained were 24.1 MPa and 29.9 MPa for PA-based GP mortar and PA-based GP concrete, respectively, after 75 days exposure to saline water. Similarly, the strengths obtained were 24.3 MPa and 30.1 MPa for PA-based GP mortar and PA-based GP concrete after 75 days exposure to HCl media water. A similar corrosion test is performed in distilled water media. The strength was found to be 24.1 MPa (PA-based GP mortar) and 30.0 MPa (PA-based GP concrete) after 75 days corrosion in distilled water. Thus, there is no difference in strength properties observed in those two materials after exposure to different media. The ...