Calcium carbonate (CaCO3) contents influence the properties of mambong clay

Abstract

Traditional Mambong pottery was created by the raw Mambong clay itself with hand building and throwing methods. However, a research was conducted to study the influences on properties of Mambong clay with the various amount of CaCO3 as an additive. The CaCO3 content has been increased by 5, 10 and 15 wt% and compared to the pure Mambong clay to identify the changes occurred. The samples were fabricated by using slip casting method. Then, the samples were dried and fired at 900 °C for 8 hours. Several analysis tests were conducted including shrinkage, density and porosity tests as well as samples' strength. This research was compared with the previous research with different firing duration. The results showed that 10 wt% CaCO3 addition into Mambong clay is the best sample for all researches. However, the longer firing duration gave the higher strength as the result. © 2022 Author(s).