In the framework 2016 – 2017 Academic year fall seminar of Hitit Üniversity Faculty of Engineering, a seminar entitled "Geopolymer Technology and Application" was held by Asst. Prof. Dr. Cengiz Bağcı of Department of Metallurgical and Materials Engineering.
In the first part, Dr. Bağcı mentions that Geopolymers (GPs) are a type of inorganic polymeric, new ceramic like materials, differently from an alkali-activated materials. Due to their outstanding properties such as strength and environmental impact, GPs have been the focus of researches especially in last two decades. Their ability to be produced from waste materials at ambient temperatures, low CO2 releasing into atmosphere, low setting time and high compressive strength make GPs as an alternative to Portland Cement (PC). The term geopolymer coined by Joseph Davidovits in1978, comes from (Geo-polymer) because they can be synthesized from geologic resources and includes polycondensation reaction like as thermoset polymers.
In Part II, potential application areas of GPs and recent developments were presented; GPs have a wide application area from low technology (GP-cement) to high technology (high temperature GP-composites). In recent years, GP can be used in the construction of structures ranging from cm size to meter size by developing of 3D printing technology.
After this review, Dr. Bağcı focused on his recent study related to synthesis of ceramic materials from geopolymers in the last part of his talk. An alternative method to produce ceramic materials from geopolymer precursors is to convert them into carbide analogues by carbothermal reduction. In this way, high purity silicon-based ceramics and also the GP-composites, consisting of combinations of geopolymeric phases and carbon-related phases, can be obtained in a wide range by controlling the structure.