Image processing applied to the analysis of segregation in lightweight aggregate concretes

International audienceLightweight concretes are susceptible to present aggregate segregation due to density differences between its components. In fact, during concrete vibration, lightweight aggregate tends to float, which may affect the concrete’s mechanical properties. This fact justifies the needs for the identification and quantification of this phenomenon. The present work presents a means of evaluating the segregation via an image processing based technique. Moreover, an index for classifying concretes according to the aggregates uniformity distribution is proposed. The examples and validation tests indicate that this uniformity analysis may be efficiently applied to the evaluation of aggregate distribution on concrete samples

Evaluation of aggregate gradation in lightweight concrete via image processing

International audienceThe present work presents a means of evaluating the particle size distribution of aggregates on hardened concretes via an image processing based technique. Such a technique may be employed to the reconstitution of hardened concrete composition, which is a matter of interest concerning, specially, lightweight aggregate concretes. This work presents the results obtained by applying the proposed methodology to synthetic experiments and to pictures taken from lightweight aggregate concrete samples