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Waste Paper Sludge Ash as Supplementary Material for Cement

School of Mechanical and Civil Engineering, Shoolini University of Biotechnology and Management Sciences,
Solan-173229 (H. P.), India
*(e-mail :; Mobile : 9459268898)
(Received : July 20, 2019; Accepted : September 18, 2019)


The large-scale production of cement is causing environmental problems and also depletion of natural resources. This research work demonstrated the possibilities of using waste paper sludge ash as partial replacement of cement in concrete. An uncontrolled combustion process was used to obtain waste paper sludge ash (WPSA) as an admixture to ordinary portland cement of grade M43 and M53 in concrete. The compressive strength and split tensile strength of concrete were achieved by adding waste paper sludge ash. Four different replacement levels, namely, 5, 10, 15 and 20% were chosen for the concerned study, with replacement method, with large range of curing periods starting from 7 and 28 days. Cubes (150 × 150 ×
150 mm) and cylinders (150ø × 300 mm) of six in numbers with varying ratios of WPSA were casted. The tests results demonstrated that compressive strength and split tensile strength increased up to 20% with
5% replacement of WPSA. Use of waste paper sludge ash in concrete proved economical.
Key words : Waste paper sludge ash, ordinary portland cement, strength