On Mix Compositions of Fly Ash Based Inorganic Polymeric Materials

In this study, the effects of metakaolin content on workability and mechanical properties of fly ash based inorganic polymeric materials are investigated. Raw materials used include fly ash (FA), metakaolin (Meta), sodium hydroxide (NaOH), silica fume (SF), water and sand. FAM is defined as the total weight of FA and Meta. The ratios of Meta/FA investigated are 0%, 10%, 20% and 30%; NaOH/FAM are 0%, 5%, 7.5%, and 10%; and SF/FAM are 0%, 5%, 7.5%, and 10%. The slump and demold age of each batch are measured, also the compressive strength of prism specimens at ages of 1 day, 7 days and 28 days. Possible effects of various compositions on workability and compressive strength will be discussed in this paper, and attention will be given to the mechanism of the added Al-rich constituent in the polymerization reaction of fly ash based inorganic polymeric materials.