Characteristics and Environmental Assessment of Facing Bricks Produced from Dredged Sediments and Waste Glasses

The laboratory-scale study was conducted to assess the feasibility of using dredged sediments with waste glasses to produce facing bricks. This study was investigated into three different proportions of waste glasses ranging from 0, 20, and 40% by weight mixed with dredged sediments as raw materials in producing facing bricks. The characteristics of the dredged sediments, waste glasses, and fired facing bricks were analyzed using X-ray fluorescence (XRF) and X-ray diffraction (XRD. The physical-mechanical properties of fired bricks were compliant with the criteria for facing bricks (Thai Industrial Standards 168-2546). The results showed that major chemical compositions of dredged sediments and waste glasses were silica (SiO2) with the value of 43.50% and 70.70%, respectively. Heavy metal contents including Cr, Cu, Zn, As, Cd, Hg, Pb, Mn, Sr, and Ni were lower than the soil quality standard. Results of this study indicated that dredged sediments and waste glasses are suitable as primary raw materials in the production of facing bricks and could be considered to represent an environmental friendly product.