The Fatigue Behaor of Rolled Compacted Concrete

This paper presents the partial results of a research on Rolled Compacted Concrete (RCC) which aimed at characterizing its fatigue behavior. The influence of cement content (120, 200 and 280 kg/rn 3 ), the mixture aggregate grading (fine, medium and coarse) and the compaction energy (normal Proctor, intermediary and modified) were assessed in the research. The tests were carried Out with a 810 MTS (Material Test System) equipment. Senoidal loading was applied, with a 5 Hz frequency and 10% remaining load of the concrete flexural strength. The specimens were prismatic (15xl5x5Ocrn) and the loading applied at the four-point bend specimens. During fatigue tests, the beam maximum bending was monitored by a pair of LVDT to determine the elasticity modulus under bending. The test was over when there was total rupture of the specimen, and fatigue life was obtained for each stress level applied. At the end of this paper, the fatigue behavior models obtained for the RCC mixtures studied, as well as an analysis of the influence of the vaiiables tescaiclied we presented.