Utilization of Wastes from the Coke-Chemical Production and Sewage Sludge as Additives in the Brick-Clay

Current modern building technologies use a greater variety of building materials and elements of these. Lately, intensive work has been done on investigating possibilities for using different wastes as additives in the production of new ceramic building products. This demonstrates that the raw material base can be enlarged and some environmental problems solved.The present work investigates the possibility of combined utilization of sludge from the Sofia wastewater treatment plant and waste products from coke-chemical production as additives to brick clay. The most appropriate combinations and concentrations of the materials used, and the means of preparing and firing the brick masses are determined. The strength characteristics of the resulting products are studied. The results obtained are useful in showing possibilities for the solution of environmental problems.