Fill Box Apparatus is used to measure the filling ability of self-compacting concrete with a maximum aggregate size of 20 mm. The apparatus consists of a container (transparent) with a flat and smooth surface. In the box, there are 35 pieces of obstacles made of PVC material with a diameter of 20 mm and a distance of 50 mm from the center to the center. At the top of the box, there is a filling pipe with a diameter of 100mm and a height of 500mm for filling material. There is a funnel with a height of 100 mm on the pipe.
