Abstract
Magnesium oxide cement is a promising alternative to Portland Cement considering its carbon capture ability. Hydration of magnesium oxide produces magnesium hydroxide with a low compressive strength. However, after carbon dioxide curing application significant strength development can be obtained. The efficiency of carbon dioxide curing depends mainly on the depth of carbonation which is related to the surface area/volume ratio. In this study, 3D printed specimens were produced in order to enhance the rate of carbon dioxide penetration. The compression tests and microstructural investigations (TGA, SEM, XRD) were conducted on the specimens. The compressive strength of carbonated 3D printed P0M100 specimens was 7 times higher that of air cured ones. According to microstructural investigations the main form of carbonated magnesium was found to be nesquehonite.