Development of Fly Ash Based Geopolymer As Anti Erosion Coating

• Main Author: Ramli, Noor Hafizah
• Format: Final Year Project
• Language: English
• Published: Universiti Teknologi PETRONAS 2012
• Subjects: TP Chemical technology
• Online Access: http://utpedia.utp.edu.my/9680/1/2012%20-%20Development%20of%20Fly%20Ash%20Based%20Geopolymer%20as%20Anti%20Erosion%20Coating.pdf; http://utpedia.utp.edu.my/9680/
• Institution: Universiti Teknologi Petronas

Rapid development of marine resources increasingly demands the huge range of concrete coastal structures and offshore structures. However, the concrete exposed in rigorous marine environment is readily damaged by the erosive ocean-atmosphere and seawater. Besides, erosion also happens because of acidic environment especially from sewage and wastewater chemical treatment system. Several types of coatings such as acrylic, polyurethane, epoxy and others now have been tried as surface protection materials to inhibit the intrusion of corrosive and erosive ions. However, organic coating usually covers the concrete surface by physical absorption that makes it caduceus. The durability of thin coatings is also doubtful. The use of inorganic polymer coatings to substitute organic coatings seems to be an alternative way of improving the durability of marine concrete structures. The alternative material which is geopolymer has been introduced to the concrete that is more environmental friendly and saves cost. It is also known as inorganic polymer or alkali activated binder has gained worldwide interest and its high anticorrosion makes it a novel coating material. This development to the composite has been investigated widely over the past 50 years. By using the fly ash that contains high aluminosilicate and calcium to produce the geopolymer, the project will investigate anddetermine the best formula for geopolymer as anti erosion coating. Moreover, fly ash as has advantages over metakaolin in terms of lower cost as it is a waste from coal and easy to produce geopolymer. The best formula will be use to produce geopolymer and coat the concretes. The concretes that coat with fly ash based geopolymer will go through erosion evaluation to prove that the coating is effective anti erosion coating under acidic environment and rigorous marine environment.