VISUALIZATION OF CRACK PROPAGATION AROUND COARSE AGGREGATES IN CONCRETE BY DIC MEASUREMENT

Abstract

We visualize crack propagation behavior around coarse aggregates in concrete by the DIC (Digital Image Correlation) measurement of a concrete cross-section. The DIC measurement used in this study is an original method that we have developed to measure the crack propagation in concrete at high resolution with a general digital camera and lighting equipments. The summary and characteristic of the DIC measurement is first explained. We show the visualization results of crack propagation behavior around coarse aggregates in concrete measured by the DIC method. In addition, the behavior of crack propagation and crack opening under compressive load can be visualized by showing the direction vectors of maximum principal strain.