A Laboratory Assessment of Replacement of Cement by Hypo Sludge as Green Concrete

The use of paper-mill pulp in concrete formulations was investigated as an alternative to landfill disposal. The cement has been replaced by waste paper sludge accordingly in the range of 0%, 2%, 4%, 6%, 8%, 10%, 12% and 14% by weight for M25 and M40 mix. By using adequate amount of the waste paper pulp and water, concrete mixtures were produced and compared in terms of slump and strength with the conventional concrete. The compressive strength increases with the increase in Hypo Sludge compared with normal concrete. The values that are obtained increased at 7 days and 28 days of curing for increase up to 12% and then decreased of Hypo Sludge replaced by cement. When the cement is replaced with 12% Hypo Sludge gives the optimum compressive strength. At 12% Hypo Sludge replacement to cement increases compressive strength than conventional concrete in 28 days about 21.08% in M-25 grade concrete and about 16.93% in M-40 grade concrete. And similar. The Flexural strength at 12% Hypo Sludge gives the optimum Flexural strength. Optimum flexural strength at M-25 grade is over conventional concrete in 28 days about 19.48% increase and M-40 is 18.34% increased. The workability of concrete decreases from medium to low with an increase in content of hypo sludge.