Studying the composition of concrete samples can be performed easily under the ESEM. Sometimes, the origin of the aggregates and their main composition must be determined. In this case is the presence of calcareous (CaCO3) aggregates in the concrete mix. In some countries, Aggregates are obtained from crushed rocks. Calcium carbonates have a similiar intensity under the BSE mode when compared to CSH. This quite be uncommon in places where aggregates are commonly from siliceous origin.
Sample w/b ratio 0.65
A quick look on the previous images confirms the presence of calcium carbonate as the main aggregates in concrete samples. In the coming future, more explanations regarding the EDS analysis on this type of samples will be shown.
Until next time,
