This paper describes cracking in full scale window opening walls made of several types of concrete. Five types of concrete walls were constructed; concrete walls made of, normal strength concrete(about 30MPa), steel fiber reinforced concrete, high-strength concrete(about 60MPa), high-strength concrete with silica fume(about 70MPa) and normal strength concrete with reinforcing bars placed at the corners of the window opening. The effect of the concrete strength, steel fiber and reinforcing bar on arresting the crack propagation in concrete walls was investigated experimentally. The results showed that steel fiber and reinforcing bars were effective in arresting the crack propagation in concrete walls, on the other hand, the high strength concrete was not effective. This may indicate that the ductility performance of concrete strongly affects the crack propagation.
