Experimental Study on Acoustic Emission Characteristics of Splitting Damage Processes for Different Ages of Concrete
A total of 18 specimens’ damage processes of concrete under split load in 1d, 3d, 5d, 7d, 14d and 28d ages are monitored by acoustic emission (AE) technique and corresponding typical AE characteristics are summarized. The results show that splitting tensile strength of concrete and the number of AE hits are both showing a gradual increase with the growth of age. During the process of splitting failure of concrete specimens in 14d and 28d, AE hits in higher duration and amplitude are collected, It shows that the older concretes tends to release more energy, at last, AE parameters which are in higher correlation with the development of mechanical properties for early age concrete are given. Related research conclusions can provide the foundation for the research of strength development and damage mechanism of early age concretes.
Paul P. Lin and Chunliang Zhang
Y. Wang et al., "Experimental Study on Acoustic Emission Characteristics of Splitting Damage Processes for Different Ages of Concrete", Applied Mechanics and Materials, Vols. 105-107, pp. 976-980, 2012