Terracotta bricks are traditionally made by shaping, drying and firing a mixture of clay and sand at a temperature between 900 and 1,100°C. (Jackson, 1984) The ceramic properties of clay bricks are mainly determined by the mineralogical composition of the raw clay and clay bricks. (Janos, 1971; Galal et al., 1985)Say no to plagiarism. Get a tailor-made essay on “Why violent video games should not be banned”? Get the original essay Abbuoda (1991) and Kamel et al (1995) studied clay deposits from the Middle Eocene, at east of Beni Mazarand, east of Maghagha, El-Minia, Egypt. They considered that these clay deposits were suitable for making terracotta bricks (Abbuoda, 1991; Kamel et al., 1995). The physico-ceramic properties of clay deposits of the Qarara Formation in the El-Mohasham region, Middle Eocene, Middle Egypt and El-Minia were studied (Othman et al., 2003 ). The results obtained indicated that the deposits consist of low-grade clay which can produce heavy bricks with relatively low mechanical properties. This limits the use of clay from the Qarara Formation in the manufacturing of terracotta bricks (Abdel Ghafour, 1995; Ramez and Ramchandran, 1993). Therefore, a lot of efforts need to be made to find suitable additives that need to be added to the Qarara Formation clay to improve the mechanical properties of the clay brick. After the innovation of high-performance concrete, traditional clay bricks no longer meet the requirements of modern and sustainable construction. technology, due to its high weight and limited thermal insulation properties (Borieset al., 2014). Many additives have been added to clay to improve certain properties of clay bricks (for example, reducing the weight of the brick and increasing its thermal insulation capacity). According to Chiang et al. (2009), the quantity of internal pores in the brick is a determining factor. The nature and quantity of additives have a direct impact on the physical properties of bricks. Lightweight bricks were generally made by adding fuels as blowing agents and agricultural wastes (e.g. corncobs (Nkayem et al., 2016), seeds (Saiah et al., 2010), grass (Demir, 2008), residues olive mill solids (La). Rubia-García et al., 2012), sunflower seed hulls (Banhidi and Gomze, 2008), rice husks (Chiang et al., 2009), husk ashes. rice (Sutas et al., 2012) and rice husks (Banhidi and Gomze). ,2008)) as well as industrial waste (e.g. sawdust (Demir, 2008), biogas (Eliche-Quesada et al., 2011), kraft pulp residues (Demir et al., 2005), processing residues from recycled paper (Sutcu and Akkurt, 2009), polystyrene (Veiseh and Yousefi, 2003) and sewage sludge (Weng et al., 2003)). It is necessary to find a compromise between its thermal and mechanical properties in order to produce a good quality lightweight brick (Bories et al., 2014). DWTS is a drinking water waste treatment industry that uses alum coagulant for the clarification of raw water (Goosens, 1996). The amount of DWTS reaches approximately 5% by weight of the total amount of untreated water (Vaebi and Batebi, 2001). DWTS are composed of inorganic substances (e.g. silica, aluminum and iron hydroxides) and organic substances (Miroslav, 2008). The common practice for handling DWTS in developing countries is to dispose of it in the nearest watercourse. This practice has a negative impact on the environment.