A partnership between IFSTTAR and ULB allowed joined experimental tests on the same ordinary concrete in order to investigate the early age mechanical behaviour since setting time. Besides the usual determination of the instantaneous mechanical properties, this paper (part 1 & 2) presents an experimental methodology using two different test rigs enabling a monitoring of the stiffness, the creep or the relaxation of a concrete sample since setting time. Tension and compressive tests have been carried out on a revisited Temperature Stress Testing Machine (TSTM) at ULB [2][3] and are mainly presented in this part while compressive tests, carried out on another test rig called BTJASPE designed at IFSTTAR, have been presented in the first part.
