ABSTRACT
ABSTRACT. The problem of cracking in unreinforced concrete tunnel lining, especially in absence of external causes, is in close connection with the physical and chemical features of the material. The knowledge of concrete hydratation cinetics, from quasi-adiabatical tests, allowed us to define the source term of the classical Fourier's equation for heat transfer. Solving this equation can be made with the TEXO modulus, which gives a satisfying simulation of temperature fields that develop as the concrete parts are manufactured. Determing these temperature fields led us to locate zones with high rises in temperature. An aging law of thermic and elastic behaviour enabled us to determine the resulting stresses.
