| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
15th Symposium on Green and Sustainable Technologies for Materials Manufacturing and Processing
|
| Presentation Title |
Structure and Stability of Cement-Zeolite Systems for Enhanced Carbon Uptake in Ambient Conditions |
| Author(s) |
Atolo Tuinukuafe, Jessica Rimsza |
| On-Site Speaker (Planned) |
Jessica Rimsza |
| Abstract Scope |
Cement production is responsible for 5% of global carbon emission, due to high temperature processing and CO2 off-gassing CO2 during calcination. Multiple approaches are being developed to decrease the carbon footprint of cement, including the incorporation of additives such as natural zeolites, a nanoporous aluminosilicate mineral, as pozzolanic materials in concrete. However, the extent and nature of their reactions with ordinary Portland cement (OPC) binder is unknown. We used synthetic zeolites with a range of compositions, crystal structures, and surface areas to identify factors that control their interactions with OPC. The extent of reactions between zeolite and OPC was quantified, and reactivity of the zeolites were evaluated via pozzolanic reactivity tests and compared to that of zeolite in an OPC system. Changes in microstructure and phase assemblage following carbonation were quantified. Results evaluated candidate cement-zeolite compositions that can be optimized as carbon capture technologies without requiring high concentration CO2 streams. |