Evaluation Carbonation Service Life of Mortar-Coated Concrete Considering Global Warming

Abstract:

Mortar finishing is frequently used to improve the carbonation service life of structural concrete. Moreover, carbonation is aggravated due to global warmings, such as the increase of CO₂ concentration and temperature. This study shows a probability-based approach for evaluating the carbonation service life of coated concrete considering global warming. First, a carbonation model is proposed for assessing the carbonation depth of concrete with mortar finishing. The effect of global warming on carbonation is considered in the carbonation model. Second, a probability-based method is employed to determine the carbonation service life considering the thickness and mixtures of mortar finishing and substrate concrete. Based on the statistical analysis of calculation results, we find that for a concrete structural with 50 years’ service life, 15% service life will be reduced due to global warming.

• Periodical: Materials Science Forum (Volume 1041)
• Pages: 95-100
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.1041.95
• Online since: August 2021
• Authors: Xiao Yong Wang*
• Keywords: Carbonation, Coated Concrete, Global Warming, Probabilistic Approach, Service Life

References

[1] Yoon IS, Copuroglua O, Park KB. Effect of global climatic change on carbonation progress of concrete. Atmospheric Environment 41 (2007) 7274-7285.

DOI: 10.1016/j.atmosenv.2007.05.028

[2] Wang XY, Luan Y. Modeling of Hydration, Strength Development, and Optimum Combinations of Cement-Slag-Limestone Ternary Concrete. International Journal of Concrete Structures and Materials 12 (2018) 1-13.

DOI: 10.1186/s40069-018-0241-z

[3] Papadakis VG, Fardis MN, Vayenas CG. Effect of composition, environmental factors and cement-lime mortar coating on concrete carbonation. Materials and Structures, 25(1992) 293-304.

DOI: 10.1007/bf02472670

[4] Park DC. Carbonation of concrete in relation to CO2 permeability and degradation of coatings. Construction and Building Materials 22 (2008) 2260-2268.

DOI: 10.1016/j.conbuildmat.2007.07.032

[5] Li G, Dong L, Bai ZA, Lei M, Du JM. Predicting carbonation depth for concrete with organic film coatings combined with ageing effects. Construction and Building Materials 142 (2017)59-65.

DOI: 10.1016/j.conbuildmat.2017.03.063

[6] Lo TY, Liao WY, Wong CK, Tang W. Evaluation of carbonation resistance of paint coated concrete for buildings. Construction and Building Materials 107 (2016) 299-306.

DOI: 10.1016/j.conbuildmat.2016.01.026

[7] Talukdar S, Banthia N. Carbonation in concrete infrastructure in the context of global climate change: Development of a service lifespan model. Construction and Building Materials 40 (2013) 775-782.

DOI: 10.1016/j.conbuildmat.2012.11.026

[8] Benitez P, Rodrigues F, Talukdar S, Gavilan S, Varum H, Spacone E. Analysis of correlation between real degradation data and a carbonation model for concrete structures. Cement and Concrete Composites 95 (2019) 247-259.

DOI: 10.1016/j.cemconcomp.2018.09.019

[9] Stewart MG, Wang XM, Nguyen MN. Climate change impact and risks of concrete infrastructure deterioration. Engineering Structures 33 (2011) 1326-1337.

DOI: 10.1016/j.engstruct.2011.01.010

[10] Park KB, Wang XY. Effect of Climate Change on Service Life of High Volume Fly Ash Concrete Subjected to Carbonation—A Korean Case Study. Sustainability 9(2017) 157-172.

DOI: 10.3390/su9010157