الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The work done in this study is to develop procedures for brick products of clay and sludge of water treatment plant (SWTP) integrates with silica fume (SF), rice straw ash (RSA), sugarcane bagasse ash (SBA) and wheat straw ash (WSA) as a modern way to re-use of sludge. The main goals of this study are to increase the value of the SWTP and to provide a sustainable and profitable alternative to disposal for it. This study discusses the physical–mechanical properties of clay bricks when incorporated with the SWTP to replace clay at a 50% ratio. One mixture is prepared as a control mix without agriculture and industrial wastes. In addition to twelve mixtures divided into four groups, SF, RSA, SBA, and WSA, each group containing three mixes is used with 5%, 10%, and 15% by weight of SWTP content. The clay lumps were placed in brick molds (250 mm × 120 mm × 60 mm) and 50 × 50 mm × 50 mm lab scale cubes and then fired at 800, 850, and 900°C in a laboratory furnace, keeping them at the highest temperature for 3 h. Then to evaluate the physical and mechanical types of bricks produced according to Egyptian Code (ECP) 204/2005 and compared to those previously prepared control. Results shows that the replacement of 5%–15% of industrial and agriculture wastes into traditional clay brick components produced eco-friendly clay bricks with bulk density of 1.44–1.65 gm/cm3, compressive strength of 5.7–20.26 MPa, flexural strength of 0.66–2.83 MPa and water absorption of 10.02%–22.09%. Scanning electron microscopy (SEM) study confirms the porous microstructure of the brick specimens combining RSA, SBA, and WSA resulting in lower bulk density resulting in lighter and more economical structures. And then provide the main conclusion to the use of SWTP with SF, RSA, SBA, and WSA in the manufacture of bricks. By working temperature is usually practiced in brick factories, based on implementing a pilot program in this research, and limited on the tested materials and the testing procedures employed, 40 to 45 % was the optimum SWTP addition to produce brick from clay-SWTP incorporated with SF, RSA, SBA, and WSA.