Calcium Oxide

The four geometric sculptures, hand carved out of limestone, are changed on a molecular level. This is due to the thermal decomposition of limestone (CaCO3) in a lime kiln. What appear as objects slowly decomposing is accomplished by heating the material to above 825 °C, a process called calcination. This process drives off the carbon dioxide (CO2); leaving quicklime. The quicklime (CaO) is not stable and, when cooled, will spontaneously react with CO2 from the air until, after enough time, it will be completely converted back to calcium carbonate unless slaked with water to set as lime plaster or lime mortar. This process is called the Lime Cycle. Further exploration of this series converting hand carved tracery window from St. Michael’s Cathedral into calcium oxide and making plaster combined with finely grounded marble dust mixed with water used as a medium to paint. By changing the forms completely from the original pieces of work into flat two dimensional wall pieces.