The Use of Metakaolin and Geopolymer Cement to Improve Concrete Resistance to Sulfuric Acid Attack

ABOUT THE INTERNATIONAL CONCRETE ABSTRACTS PORTAL

  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal

  


Title: The Use of Metakaolin and Geopolymer Cement to Improve Concrete Resistance to Sulfuric Acid Attack

Author(s): E.H. Hewayde, E.N. Allouche, and G. Nakhla

Publication: Special Publication

Volume: 228

Issue:

Appears on pages(s): 1453-1466

Keywords: geopolymer cement; metakaolin; resistance of concrete and sulfuric acid

Date: 6/1/2005

Abstract:
Corrosion of concrete sewer pipes by sulfuric acid attack is a problem of global scope. The current paper aims at evaluating two supplementary cementing materials metakaolin and geopolymer cement as partial cement replacements for improving the ability of concrete to resist severe sulfuric acid attack. Both, metakaolin and geopolymer cement were found to significantly improve the resistance of concrete made of Type 10 and 50E cements to 3% and 7% sulfuric acid solutions (pH of 0.6 and 0.3, respectively). Maximum weight loss reduction with respect to the control for specimens made of modified Type 50E cement ranged between 20% and 37%, depending on the additive and the concentration of the acid. Maximum weight loss reduction for specimens made of modified Type 10 cement range between 10% and 42%, depending on the additive and the concentration of the acid. For this test Type 10 cement was found to perform best in the presence of geopolymer cement while the performance of the Type 50E cement was best when metakaolin was used as partial replacement for cement. The results emphasize the important role that the nature and composition of hydration products and the completeness of the hydration process play in improving concrete resistance to acid attack.