The Durability of Vaterite Calcined Clay Repairing Mortars: Another Sustainability Aspect in Innovative Low-CO2 Materials
The construction industry significantly contributes to global CO₂ emissions, with cement production alone accounting for approximately 8% of total anthropogenic carbon dioxide emissions. Addressing this environmental challenge requires strategies that both reduce emissions during material production...
| Autores: | , , , , |
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| Tipo de recurso: | capítulo de libro |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | Dadun. Depósito Académico Digital de la Universidad de Navarra |
| Idioma: | inglés |
| OAI Identifier: | oai:dadun.unav.edu:10171/117103 |
| Acceso en línea: | https://hdl.handle.net/10171/117103 |
| Access Level: | acceso abierto |
| Palabra clave: | Vaterite calcined clay Mortars |
| Sumario: | The construction industry significantly contributes to global CO₂ emissions, with cement production alone accounting for approximately 8% of total anthropogenic carbon dioxide emissions. Addressing this environmental challenge requires strategies that both reduce emissions during material production and extend the lifespan of structures through enhanced durability. Developing low-carbon cementitious binders is thus essential to achieving sustainable construction practices. Limestone Calcined Clay Cement (LC3), capable of replacing up to 50% of Ordinary Portland Cement (OPC) has emerged as a promising solution. More recently, Vaterite Calcined Clay Cement (VC3), which substitutes calcite with vaterite, a metastable polymorph of calcium carbonate, has gained attention due to its potentially superior mechanical and microstructural properties attributed to vaterite’s increased reactivity. In addition to adopting environmentally friendly materials, sustainable construction can benefit significantly from restoring and repurposing existing buildings. Many structures requiring renovation, often constructed less than a century ago using traditional concrete and cement-based materials, hold substantial cultural or social heritage value. Integrating low-carbon materials into renovation practices can thus harmonize environmental sustainability with heritage preservation. Selecting an appropriate cementitious binder is crucial for ensuring the long-term durability and effectiveness of restoration interventions. Although LC3 has been extensively studied, VC3 remains relatively unexplored, particularly in terms of durability. Previous studies indicate that incorporating vaterite enhances workability and compressive strength, suggesting that VC3 could offer a suitable alternative with performance advantages and a lower CO2 footprint. However, crucial durability parameters, such as permeability and sulfate resistance, remain largely unknown. Evaluating these factors is vital to establish VC3’s viability as a sustainable cement alternative. This study aims to address this knowledge gap by investigating VC3’s durability relative to LC3 and OPC. Experimental mortar samples were prepared, including a reference OPC mortar and mortars where calcite was progressively replaced by vaterite at increments of 0%, 5%, 10%, and 15%. The materials’ performance was evaluated based on key parameters: mechanical strength, capillary water absorption, and sulfate resistance. This comprehensive evaluation provides insights into the long-term behavior of VC3, contributing valuable data towards advancing sustainable cement technologies and addressing both environmental and structural challenges. |
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