1. The document presents research on using hypo sludge as a partial replacement for cement in concrete. Hypo sludge is an industrial waste produced from paper mills.
2. Various concrete mixes were developed with 0-30% replacement of cement with hypo sludge. The mechanical and durability properties of the concrete mixes were then tested.
3. The test results showed that concrete with 10-15% hypo sludge replacement exhibited similar or improved compressive strength, tensile strength, and flexural strength compared to conventional concrete. However, strength properties declined with replacements over 20%.