Journal
CONSTRUCTION AND BUILDING MATERIALS
Volume 249, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.conbuildmat.2020.118749
Keywords
CO2 curable construction materials; Quicklime; Hydrated lime; NaCl; Sugar; Hydration; Carbonation; Aerial lime mortar
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Funding
- Basic Science Research Program through the National Research Foundation of Korea (NRF) - Ministry of Education [NRF-2019R1I1A1A01062479]
- National Research Foundation of Korea [21A20151813143] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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In this study, the role of natural additives (sodium chloride or sugar) in aerial lime mortar was elucidated. It was found that both the hydration and carbonation were accelerated by sodium chloride but retarded by sugar. Especially, sugar prevented the rapid clogging of pores around the mortar surface, which caused the even formation of calcium carbonate crystals throughout the volume of mortar. Therefore, the strength development was significantly accelerated. The slow carbonation and resulting rapid strength development can be practically implementable since it does not rely on long term atmospheric carbonation or use of high concentration of CO2 gas. (C) 2020 Elsevier Ltd. All rights reserved.
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