The waste from coal-based thermal power plants in the form of pond ash is utilized in making of environment-friendly cement mortar with using sand and cement. The mechanical properties like compressive strength under uniaxial stress of brick masonry and cement mortars prepared with the incorporation of pond ash into the cement mortar at various mixing ratios have been determined. The mathematical relationship of compressive stress values and the composition of brick, mortar and masonry have been developed. The compressive stress, strain and Young’s modulus values and their relationships have been determined. Using pond ash lead to an increase in the strength of the mortar and brick masonry prism prepared.