Bending Fatigue Performance of Pre-Stressed Concrete Beams Containing Mineral Admixtures

Abstract

Existing scientific research and engineering practice have shown that the proper use of mineral admixtures can improve both the mechanical behavior and the durability property of concrete structures, but due to lack of necessary fatigue test basis, the use of mineral admixtures is strictly limited in railway bridges in China. Pre-stressed concrete T-beams with different dosage of mineral admixtures were prepared and then were subjected to fatigue test and failure test. It is found that these beams have good stiffness and ductility, which means excellent fatigue resistance within a certain dose range. By a suitable mix design, concrete with mineral admixtures can be applied to railway bridge construction.