A database of recycled aggregate images with labelled images and mass data. Image labels are saved as 1-channel uint16 uncompressed png files. The metadata.json file contains information for each image (resolution, acquisition method, size) and batch measurements required to calculate per-instance mass (see https://doi.org/10.1016/j.compind.2023.103889 and https://doi.org/10.1016/j.autcon.2020.103204). The file annotations.csv contains the class of each labeled instance in every image, along with their bounding boxes, resolution, mass, and other relevant information.