**4. Bentonite clay bricks**

An attempt was made to manufacture eco-friendly bricks using a combination of bentonite, clay, and lime. Bentonite content was considered as a variable, the properties of the brick were essayed. 31.91% of the carbon footprint was reduced by 20% of

**Figure 4.** *Water absorption of clay, unfired and fired bricks [28].*

bentonite replacement with clay. The durability of the bricks enhances by the incorporation of bentonite in bricks manufacturing. Water absorption was also reduced by improving the percentage of bentonite substitution, displayed in **Figure 4** [28].
