Since many years, the use of optical methods for studying behaviour of materials has made great strides. These techniques give information to improve macroscopic behaviour laws and allow observing initiation and propagation of localization phenomena. In the field of civil engineering materials and structures, optical measurements of the displacement field are more and more used (stereophotogrammetry [3], for example). On the other hand, infrared thermography is not very used to study the behaviour of concretes. For dynamical solicitation, it is common to refer of M.P Luong’s works [6].