Figure 2
The image illustrates the step-by-step process of concrete sample preparation, beginning with raw material proportions at the top and progressing through physical processes in a sequence of photographs at the bottom. At the top, five ingredients are displayed with images and labeled quantities: “Cement” with a picture of dry grey powder marked “1 part,” “Sand” with a tan granular texture labeled “4.2 parts,” “C R or R 8” (a fine black recycled component) alongside “C A” (coarse aggregate of grey stone) marked “1.8 parts,” and “Water” in a beaker labeled “0.65 w slash c.” These are joined using green plus signs, and a green downward arrow points toward the next row. In the second row, the first image is labeled “Pan mixer” and shows ingredients being combined in a metallic circular mixer. The next photo, labeled “Slump test,” shows a slump cone test setup with freshly mixed concrete formed into a truncated cone. The third image, labeled “Samples in moulds (24 h),” displays multiple concrete specimens set in rectangular wooden moulds. The final photo on the right, labeled “S C B (28 days),” shows a row of solid concrete blocks with red identification markings, indicating they are ready for testing after 28 days of curing. Green arrows between each step indicate the direction of the process flow from mixing to final sample curing.Materials and SCB casting. Authors’ own work