Evaluation of CO2 Uptake under Mild Accelerated Carbonation Conditions in Cement-Based and Lime-Based Mortars

Carla Furcas; Ginevra Balletto; Stefano Naitza; Alessandro Mazzella

doi:10.4028/www.scientific.net/AMR.980.57

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HomeAdvanced Materials ResearchAdvanced Materials Research Vol. 980Evaluation of CO2 Uptake under Mild Accelerated...

Evaluation of CO₂ Uptake under Mild Accelerated Carbonation Conditions in Cement-Based and Lime-Based Mortars

Abstract:

The industrial production of cement-based and lime-based materials such as mortars contributes significantly to the release of greenhouse gases such as CO₂ into the atmosphere. However, a percentage of these emissions is reabsorbed as the mortar hardens, owing to carbonation reactions. This study aims to explore the CO₂ sequestration capacity of a cement-based (CM) and a lime-based mortar (LM) over the first 28 days of curing. The CO₂ uptake of CM and LM was experimentally evaluated in mildly accelerated conditions by using a volumetric approach. This procedure enabled us to assess the CO₂ absorbed after 1, 7 and 28 days from mortar preparation so as to simulate CM and LM behavior during their setting, hardening, and service-life conditions. Through the experimental approach values of 19.1, 25.5 and 26.4 g CO₂/kg for CM and 5.0, 11.0 and 16.1 g CO₂/kg for LM were obtained. These results, which were validated by means of X-ray diffraction along with calcimetry analysis, confirmed that carbon sequestration by common mortars during their curing time is not negligible.

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Periodical:

Advanced Materials Research (Volume 980)

Pages:

57-61

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.980.57

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Online since:

June 2014

Authors:

Carla Furcas*, Ginevra Balletto, Stefano Naitza, Alessandro Mazzella

Keywords:

CaCO₃, Carbonation, Cement, CO₂ Uptake, Lime, Mortar

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