Abstract Scope |
Four extender batches of 95.7% recycled post-consumer glass, 0.25% colourant and 4% acrylic binder each were processed into extenders of yellow, blue, red and black separately. Textured coat batches of 20.1% Solvent, 12.0% binder, 67.0% extender, 0.2% Natrosol, 0.2% Texanol, 0.2% biocides and 0.1% ammonia were developed and characterized using atomic absorption spectroscopy (ASTM D3335). Results showed that Yellow coat has concentration of 170.65 ±0.031ppm lead, 3.40±0.025ppm Cobalt and 24.25±0.08ppm Cadmium, Red coat has concentration of 27.25±0.015ppm lead, 0.30±0.045ppm Cobalt and 9.85±0.065ppm Cadmium, Blue coat has concentration of 115.15±0.125ppm Lead, 0.30±0.01ppm, Cobalt and 9.85±0.065ppm Cadmium while Black coat has concentration of 33.10±0.37ppm Lead, 1.70±0.01ppm Cobalt and 0.30±0.02ppm Cadmium. This study shows that recycled post-consumer glass can be employed to produce textured coat with lower concentrations of heavy metals for buildings as compared to contemporary textured coats whose concentrations are greater than 90ppm for Lead, 100ppm for Cadmium and 100ppm for Cobalt. |