Figure 14
The illustration displays six photos of concrete specimens, arranged in two rows of three. Each photo shows a side view of a rectangular concrete block, with a black label in the center. The specimens are labeled from left to right, top to bottom, as: “C R-05” (with a visible “5” on the block), “C R-10” (with “10” on the block), “C R-20” (with “20” on the block), “C R-30” (with “30” on the block), “C R-40” (with “40” on the block), and “C R-50” (with “50” on the block). All specimens exhibit visible signs of heat exposure, characterized by a distinct dark band (charring) across their middle section. The extent and intensity of this dark band, as well as the presence of cracks and surface degradation, appear to vary between the specimens. The “C R-05” shows minimal charring and cracking, while specimens with higher C R content, like “C R-40” and “C R-50,” display more pronounced charring, and surface irregularities.Visual appearance of fire-damaged SCB incorporating CR eco-aggregates. Authors’ own work