In this study, the manufacturing of sintered bricks from clay and red mud was presented. The initial materials and obtained bricks were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscope (TEM), X-ray fluorescence (XRF), and differential scanning calorimetry-thermal gravimetry (DSC-TG). The compressive strength, water absorption, bulk density and sintering shrinkage of sintered bricks were performed. The effects of components of raw materials, sintering temperature and time on physico-mechanical properties of the products was investigated. The results showed that the bricks prepared at 1000 oC for 1 hr with raw material containing up to 50% of red mud provided excellent physico-mechanical properties. The obtained brick met the Vietnam standard VS1451-1998 and was satisfied the construction material requirements that were safe to human's health and friendly with environment in terms of alkaline leaching and radioactivity indexes.

Keywords: Red mud, Clay, Sintered brick.