Synthesis and alkali activation of Magnesium-rich aluminosilicates

Global warming is a serious threat to humanity. The emissions of CO2 are considered to be one of the main reasons for global warming. This has led to widespread initiatives around the world to reduce CO2 emissions. It is believed that up to 8% of the global CO2 emissions is contributed by cement industry (which produces cement, the second most utilized resource by humans). Hence, there is a greater need to develop alternative cements with reduced carbon footprint.

Alkali activated materials (AAMs) are alternative cements with reduced carbon footprint. They can be produced from industrial waste streams rich in Si and Al, thereby promoting circular economy. In addition to Si and Al, the precursors (used for the preparation of AAMs) can sometimes possess a considerable amount of Mg, and this leads to Mg significantly influencing the structure and properties of AAMs.

When compared to Si and Al, there have been relatively few studies focusing on the role of Mg in AAMs. This thesis deals with alkali activation of Mg-rich aluminosilicate precursors with the main objective of understanding the role of Mg in AAMs.