SEM analyses were performed to examine the interfacial zone
between the cement paste and both types of aggregates, dolomite
and slag. It is known from the literature [32,33] that the contact
zone between the cement paste and the aggregate is the system’s
weakest point, partially due to the different morphology of the
cement paste at the boundary with the aggregate, but also due to
water being able to accumulate beneath the large grains where
the local w/c ratio is higher.