Self-Healing Efficiency of Concretes through Permeability to Chlorides
C. F. Hollmann, L. Zucchetti, D. C. C. Dal Molin, and A. B. Masuero
Appears on pages(s):
chloride penetration resistance; crystalline admixture (CA); self-healing; service life prediction; silica fume.
Self-healing is a process by which concrete is able to recover its properties after the appearance of cracks, which can improve mechanical properties and durability and reduce the permeability of concrete. Self-healing materials can be incorporated into concrete to contribute to crack closure. This study aims to evaluate the influence of crystalline admixtures and silica fume on the
self-healing of concrete cracks. The rapid chloride penetration test was performed on cracked and uncracked samples, from which it was possible to estimate the service life of concretes. The concretes were characterized by tests of compressive strength and water absorption by capillarity. The use of crystalline admixtures did not have a negative influence on concrete properties, but did not favor the chloride penetration resistance. The concrete with silica fume showed the lowest charge passed and highest values of estimated service life.