Applied the Residues of Agricultural Industry to Product Clay Brick at Low-temperature

Abstract

Traditional clay brick production requires high heat. In the area, there are many residues from the agricultural industry sources, a source of pollution in the form of fly ash, which has a negative impact on the environment. This research is to study the production of clay bricks at low temperatures using alkali-activation technology. The starting materials include palm ash and para-wood ash, residues from the agricultural industry, and clay, a natural material. Mixed design of three types of starting materials for optimal alumina and silica composition for chemical reactions. The mixture was then activated by sodium hydroxide, potassium hydroxide, and the two solutions of 8 molar concentrations. The 5x5x5 cm3 specimens were cured at 80°C for 2 days. The compressive strength of bricks is studied at cured in the air for 7, 14, 28, and 60 days. Finally, compare it with clay bricks produced by the traditional method. The results showed that the properties of low temperature fired clay bricks could be developed for maximum compressive strength of 262.06 ksc, which was higher than clay bricks produced by traditional methods. More ash mixture tends to decrease compressive strength and density. The clay brick at a low-temperature process has no shrinkage and no water solubility. This indicates that their structural strength is comparable to the clay brick at a high-temperature process.