use of cylindrical capsules containing a repairing agent. Cementitious hollow tubes (CHT)
having two different internal diameters (of 2 mm and 7.5 mm) were produced by extrusion
and used as containers and releasing devices for cement paste/mortar healing agents.
Based on the results of preliminary mechanical tests, sodium silicate was selected as the
healing agent. The morphological features of several mix designs used to manufacture the …