@article{6317b59f7f7748839bff131de93ebda7,
title = "Influence of CO2 concentration on the performance of MgO cement mixes",
abstract = "This paper investigated the influence of different CO2 concentrations on the microstructural and mechanical development of reactive MgO cement (RMC) concrete. Combination of various analyses revealed the enhancement of hydrated magnesium carbonate (HMC) phases with relatively superior micro-mechanical properties as the CO2 concentration increased from ambient (~0.04%) to accelerated (5–20%) levels. The higher CO2 diffusion within samples cured under 5–20% CO2 increased the compressive strength by ~5 times. While samples cured under 20% CO2 revealed high early strengths, the formation of a dense HMC layer on the sample exterior led to limitations on further CO2 diffusion. Use of 5% CO2 produced comparable strengths as 20% CO2 at 28 days, highlighting the potential of using lower concentrations. Samples cured under 10% CO2 revealed the best performance at 28 days, thereby defining this environment as the most favorable condition for the development of microstructural and mechanical properties of RMC concrete.",
keywords = "CO concentration, Carbonation, MgO cement, Microstructure, Strength",
author = "Dung, {N. T.} and R. Hay and A. Lesimple and K. Celik and C. Unluer",
note = "Funding Information: N.T. Dung and C. Unluer received funding from the Singapore-MIT Alliance for Research and Technology Innovation Centre ( ING1510112 - ENG ). R. Hay and K. Celik are grateful to Dr. Abdullah Khalil and Core Technology Platform (CTP) experts, specifically Dr. James Weston and Dr. Liang Li, of New York University Abu Dhabi ( NYUAD ) for their help during the experiments. This work was supported by the NYUAD Center for Interacting Urban Networks (CITIES) , funded by Tamkeen under the NYUAD Research Institute Award CG001 and by the Swiss Re Institute under the Quantum Cities{\texttrademark} initiative. Funding Information: N.T. Dung and C. Unluer received funding from the Singapore-MIT Alliance for Research and Technology Innovation Centre (ING1510112-ENG). R. Hay and K. Celik are grateful to Dr. Abdullah Khalil and Core Technology Platform (CTP) experts, specifically Dr. James Weston and Dr. Liang Li, of New York University Abu Dhabi (NYUAD) for their help during the experiments. This work was supported by the NYUAD Center for Interacting Urban Networks (CITIES), funded by Tamkeen under the NYUAD Research Institute Award CG001 and by the Swiss Re Institute under the Quantum Cities? initiative. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",
year = "2021",
month = jan,
doi = "10.1016/j.cemconcomp.2020.103826",
language = "English (US)",
volume = "115",
journal = "Cement and Concrete Composites",
issn = "0958-9465",
publisher = "Elsevier Limited",
}