| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
ACerS-ECerS Joint Symposium: Emerging Leaders in Glass and Ceramics
|
| Presentation Title |
The Role of Porous Additives on Carbonation of Cement-Based Composites |
| Author(s) |
Melissa M. Mills, Atolo A. Tuinukuafe, Chven A. Mitchell, Jessica Rimsza |
| On-Site Speaker (Planned) |
Jessica Rimsza |
| Abstract Scope |
Cement and concrete production are responsible for ~5% of global carbon emissions, due to the high energy processing and off-gassing of CO2 during calcination. Supplemental cementitious materials (SCMs) can decrease the amount of portland cement binder in concrete, lowering its carbon footprint. Porous SCMs, like aluminosilicate zeolites and clays, control the properties in the resulting cement composites provided that the extent and nature of the reactions between the porous SCMs and ordinary portland cement (OPC) are known. Here zeolites and clays with a range of compositions and structures were evaluated for their stability in OPC binders and the effect on the chemical and physical properties of hydrated cement binders was characterized. Ambient and high concentration carbonation was performed, and changes in microstructure and phase assemblage were evaluated. Results guided optimization of porous SCMs as a carbon capture technology. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525. |