Development of Ash-Based and Slag-Based Pressed Geopolymer

Utilizing natural resources as building materials are not suitable for sustainable development as it will lead to the depletion of natural resources in the future. Hence, the use of waste materials is taken into consideration in the context of the construction industry. In terms of converting waste materials to useful products, industrial wastes of various types such as fly ash, bottom ash and blast furnace slag can be used in geopolymer technology. Considering the demand for producing high mechanical properties of geopolymer, recent innovation has led to the development of pressed geopolymer. It combines the benefit of low alkali activator content and pressure compaction proved that pressing method is featured in a simple process, time-saving, cost-saving as well as facile in large scale production. To bring a better understanding of the pressing method, two types of pressing methods are clarified. Furthermore, few types of waste that can be used as starting materials for geopolymer production are suggested in this chapter. Besides, this chapter also discussed the factors that influence the properties of pressed geopolymer.