PURPOSES : Previously, the expansion state of the concrete pavement in which AAR occurred could not be determined. Because the current situation has not been evaluated, it has been difficult to prepare an appropriate response. In this study, a method for calculating the expansion amount of concrete pavement using the stiffness damage test (SDT) is proposed. METHODS : The SDT method was examined through a literature review. For the laboratory tests, specimens that generated AAR were produced based on the mix design (2018) of the Korea Expressway Corporation. SDT was used to calculate various mechanical properties, and their correlation with the expansion amount was reviewed. RESULTS : Using the SDT, various mechanical properties(elastic modulus, hysteresis area, plastic deformation, plastic deformation index, stiffness damage index, and nonlinear index) were calculated based on the expansion rate of the AAR. The elastic modulus was evaluated as the best predictor of the expansion rate. Thus, if the elastic modulus is calculated using SDT, a prediction equation can be used to calculate the amount of AAR expansion. This equation will need to be supplemented by further research. CONCLUSIONS : SDT was used to confirm that the expansion state due to the AAR of the concrete pavement could be indirectly evaluated. Among the mechanical properties related to SDT, the elastic modulus was found to be the most suitable for predicting the amount of expansion.

The purpose of this study was to verify relationship between perceived coach-athlete fit and psychological needs satisfaction. Additionally, this study was conducted to examine whether there was significant difference between both variables in accordance with competence level that athletes perceive. For this, we collected responses about coach-athlete fit, basic psychological needs satisfaction, and perceived competence level from 197 Ssireum(Korean traditional wrestling) players. The result of analysis, coach-athlete fit generally had impact on psychological needs satisfaction. Specially, as athletes felt that their skill training method and characteristic trait were coincided with their coach, level of athletes` competence and relationship needs satisfaction were high. Futhermore, competence level influenced on perception of coach and athlete fit, partly because it moderated relationship between coach-athlete fit and psychological needs satisfaction. These results were discussed in terms of coach-athlete behavior fit of psychological process response based on Self-Determination Theory(SDT).