Title:
Behaviour of quaternary eco-mortars from carbonated wastes
Author(s):
A.M. Moreno-Reyes, M.V. Paredes, A. Guerrero, I. Vegas, J. Moreno and M. Frías
Publication:
Symposium Paper
Volume:
370
Issue:
Appears on pages(s):
35-42
Keywords:
eco-mortars, physical-mechanical properties, quaternary cements, Wastes as a CO₂ sink
DOI:
10.14359/51751746
Date:
5/1/2026
Abstract:
This study presents an innovative strategy for mitigating the environmental impact of the cement industry through the development of quaternary cements with alkaline wastes previously mineralised with CO₂. The technique used consists of exposing metal oxide-rich waste to CO₂ atmospheres in a 5 L capacity laboratory-scale static reactor, promoting the formation of stable carbonates such as CaCO₃ and MgCO₃. This process not only allows for the permanent capture of CO₂, but also improves the pozzolanic reactivity of the waste, which is beneficial for its application as SCMs. Eco-mortars were developed by partially replacing (7% and 20%) cement with a ternary mixture of carbonated waste. Their physical-mechanical properties were evaluated after a curing process in water for 2 and 90 days. The results obtained allow the technical and environmental viability of this proposal to be assessed in the context of the production of more sustainable cements.
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