Effect of fly ash on hydration and carbonation of carbonation-cured Portland cements

Effect of fly ash on hydration and carbonation of carbonation-cured Portland cements

Blog Article

This study investigates the impact of fly ash on hydration and carbonation processes in carbonation-cured fly ash cements.Cement paste samples with fly ash replacement levels of 0 %, 5 %, 10 % and 30 % underwent carbonation curing kicker pro comp 10 for 28 days.Results reveal that the CaO content does not affect the final CO2 absorption capacity.Instead, optimal fly ash replacement of 10 % enhances CO2 uptake, yielding 52.

9 g of CaCO3 on the surface after 28 days of curing, compared to 43.4, 43.1 and 48.4 g for 0 %, 5 % and 30 % read more replaced samples, respectively.

Additionally, fly ash incorporation significantly enhances belite reaction and improved CO2 binding capacity.However, the reaction extent of alite was lower when exposed to CO2-curing conditions.These findings advance understanding of blended cements in carbonation-curing, facilitating the development of environmentally friendly and durable concrete structures.