Alex Neves Junior
Federal University of Mato Grosso, Brazil
Title: A study of the fluidic movement of the hydrated products from the early carbonation curing in cementitious paste and the effects on the mechanical and porosity properties
Biography
Biography: Alex Neves Junior
Abstract
In a previous work, the authors achieved the best environmental conditions to capture CO2 in a high initial strength and sulfate-resistant Portland cement pastes after 24 hours of carbonation. However the samples that were totally carbonated with the consumption of all Ca(OH)2 had their mechanical properties affected. The samples presented a high initial water to cement ratio in the moment of treatment and considering that they were treated with carbon dioxide at early stages with a high initial porosity in a low relative humidity ambient, the flow of the fluids to the inner parts to outer parts of the samples, affected the distribution and the amount of the hydrated and carbonated products formed. The aim of this work was to analyze by thermogravimetry (TG), derivative thermogravimetry (DTG) and compressive strength test, considering different times of carbonation, the distribution of the hydrated and carbonated products formed in the profile of the samples and the relationship with the mechanical properties.
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