Inert material with binding rim by reactive milling
Sustainable Construction Materials and Technologies (1): (2019)
Contribution to Conference
The use of hydraulic binders with an inert core and reactive shell may be an opportunity to develop more efficient mineral building materials. Reactive milling is one method to obtain such structures, known as a method of mechanochemistry. Tests were performed using CaO and CaCO3 as calcium containing components and cristobalite, silica fume and quartz as silicon containing components as powders using a planetary ball mill. The reaction products were examined using Attenuated Total Reflection (ATR) IR spectroscopy and light microscopy. A very clear new formation of a group of peaks around 900 cm-1 (typical for a calciumsilicate) was observed for CaO and cristobalite. The CaO/silica fume and CaO/quartz pairs behave similarly in principle. The tests showed that it seems possible to produce a material with an inert core, for example quartz, and a reactive rim, for example calciumsilicate, using reactive milling.