Figure 1.
The twelve close-up views present different material textures and forms. The top row contains R 1 C P with coarse angular fragments, R 2 L S with fine granular particles, R 3 S S with mixed small grains, R 4 C F with compacted irregular fragments, R 5 R L C A with fine granular material, and R 6 S M with small irregular particles. The bottom row contains R 7 G with a smooth fine surface, R 8 F W with fibrous material, R 8 W with elongated wood-like pieces, R 9 G P with a smooth cracked surface, R 10 P with numerous small, rounded pieces, and R 11 I with a fine textured surface.Construction and demolition waste materials characterised and classified using spectroscopic and deep learning methods (R1-CP, cement paste; R2-LS, limestone sand; R3-SS, siliceous sand; R4-CF, ceramic fraction; R5-RLCA, recycled limestone concrete aggregate; R6-SM, siliceous mortar; R7-G, gypsum; R8-FW, wood fibres; R8-W, wood chips; R9-GP, glass powder; R10-P, polyethylene; R11-I, iron)