Long term performance of concrete using accelerated carbonation curing: an effective CCUS technique

Abstract

The induction of accelerated carbonation curing (ACC) as carbon capture, utilization, and sequestration (CCUS) technique helps in achieving the net zero target. ACC is one of the potential techniques to sequester the CO₂ in concrete. However, the usage of ACC in reinforced concrete is still debatable. This paper investigates the effect of ACC on mechanical, permeation, mineralogy, hydration and microstructural characteristics of concrete with the long-term performance of reinforced concrete using linear polarization resistance (LPR) and carbonation depth. In order to study the effect of ACC duration on the properties of concrete, the specimen was subjected to 6, 12, and 24 hours (h) of carbonation curing. The results were compared with conventional water-curing specimens. ACC at 12 h provided the best results for tested properties. The results were varied by statistical analysis using ANOVA and stoichiometry. Based on the best 12-h duration, 2.13 kg of CO₂ can be sequestered in 1 m³ (0.89 kg/t) of concrete.

Keywords:

• Accelerated carbonation curing
• CO₂ sequestration
• CCUS
• concrete corrosion
• long term performance

Acknowledgments

The authors are thankful to the funding agencies; namely National Buildings Construction Corporation (NBCC) India Limited under grant sanction No: NBCC/ED(R&D)/LOI/2020/01 and All India Council For Technical Education (AICTE) under grant sanction no: 8-183/RIFD/RPS(POLICY-1)/2018-19 for the financial support.

Disclosure statement

The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

Data availability statement

Data will be made available on request.