| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Bio-Nano Interfaces and Engineering Applications
|
| Presentation Title |
A Carbon-negative Self-healing Construction Materials |
| Author(s) |
Shuai Wang, Suzanne Scarlata, Nima Rahbar |
| On-Site Speaker (Planned) |
Shuai Wang |
| Abstract Scope |
Concrete is the most widely used material in the world and is responsible for 8% of global carbon emissions. The efforts to find an alternative to concrete have not been fully successful. Inspired by the process of CO2 exchange in biological cells, this talk introduces a novel method to create a negative-emission enzymatic construction material (ECM) with self-healing capabilities. We have used carbonic anhydrase (CA) to catalyze the condensation of CO2 and water to promote the precipitation of calcium ions in the aqueous solution as calcium carbonate crystals. The resulting ECM has compressive strength and Young’s modulus more than twice that of the minimum acceptable for cement mortar and other alternative building materials. The strengthening mechanism through the growth of mineral bridges that hold the sand particles in the structure of ECM is also modeled and studied. This work provides a new path for development of environmentally friendly construction materials with low cost. |
| Proceedings Inclusion? |
Planned: |