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Products of porous bricks from low grade diatomite and sugar filter mud (SFM) in different proportion between 0 and 30 wt% were fabricated at sintering temperatures ranging from 700 to 900 °C. Effect on physical and mechanical properties of sinterring temperature and adding proportion of sugar filter mud were investigated. Physical and mechanical properties of samples were determined by DSC-TG thermal analysis, XRD, SEM and universal testing machine. The samples of porous bricks after sintering have acceptable performance parameters. The best combination of mechanical and physical properties is achieved for a mixture of 70 wt% diatomite, 20 wt%SFM with the additions of 6 wt% dolomite and 4 wt% sodium perborate sintering at 800 °C. The apparent porosity was 50.39%, bulk density was 1.25 g/cm 3 , the flexural strength was 10.05 MPa. [ABSTRACT FROM AUTHOR]