Characterization of Calcium Sulfoaluminate Cements Exposed to Accelerated Weathering Carbonation Conditions

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Title: Characterization of Calcium Sulfoaluminate Cements Exposed to Accelerated Weathering Carbonation Conditions

Author(s): Seo

Publication: Web Session

Volume: ws_S23_SeoHKLee.pdf

Issue:

Appears on pages(s):

Keywords:

DOI:

Date: 4/2/2023

Abstract:
The serious CO2 footprint pertaining to the production of Portland cement has necessitated the development of alternative cementing materials with lower CO2 emission (Mo et al. (2015)). Calcium sulfoaluminate (CSA) cement represents an ecofriendly alternative to Portland cement owing to less CaCO3 input than Portland cement and hence has been drawing attention as a potential replacement of Portland cement (Chen and Juenger (2021)). Meanwhile, the characterization of cementitious materials exposed to weathering carbonation is of critical importance since most of these materials are typically jeopardized by the ambient atmosphere (Han et al. (2013)). In addition, the carbonation behavior of cementitious materials is a significant issue in relation to the concrete durability given that the carbonic reaction induces neutralization of the matrix and depassivation of reinforcing steel (Puertas et al (2005)). In particular, the carbonation-induced microstructural evolution of the reaction products in CSA cements is known to be significantly different from that in Portland cement (Seo et al. (2021)). In this regard, earlier works on the characterization of CSA cements exposed to accelerated weathering carbonation conditions will be summarized and presented.




  

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