article · Advances in Civil Engineering
This research evaluates the use of waste paper pulp ash as a partial replacement for cement in concrete production. Concrete mixtures were prepared for 25 MPa target strength by substituting ordinary Portland cement (OPC) and Portland pozzolana cement (PPC) with 0%, 5%, 10%, and 15% waste paper pulp ash. Testing revealed that replacing 5% of OPC with this ash produced the highest compressive strength across all curing periods, reaching 36.83 MPa at 28 days. Conversely, all replacement levels in PPC reduced compressive strength compared to the control mix. Increasing the ash content led to higher water absorption in the concrete. However, blended concretes using either OPC or PPC combined with waste paper pulp ash showed improved resistance to a 2% sulfuric acid solution compared to the control mix. The substitution lowers concrete costs and conserves raw materials.
Traditional cement production consumes high volumes of natural raw materials and entails significant production costs. Identifying viable industrial or post-consumer waste substitutes, such as paper pulp ash, helps address waste management challenges while creating more acid-resistant concrete mixes. This approach offers a route to lower the material costs of concrete without sacrificing strength when used at specific replacement ratios.
This work is an applied laboratory evaluation relevant to concrete manufacturers and construction material suppliers seeking cheaper, recycled alternatives to ordinary Portland cement. By demonstrating that a 5% replacement of OPC reduces costs while improving both strength and sulfuric acid resistance, the findings offer an initial formulation benchmark. However, the study remains at an applied testing stage, requiring broader structural trials and durability evaluations prior to commercial deployment.
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An investigation was conducted to study the viability of using waste paper pulp ash as an alternative material applied as a partial replacement of cement in the manufacturing of concrete and its effect on the properties of concrete, and also, the cost and environmental advantage of using waste paper were examined. Four concrete mixes with 0%, 5%, 10%, and 15% waste paper pulp ash replacement of OPC and PPC for 25 MPa concrete were prepared. Based on the results obtained from the research, the highest compressive strength obtained at all test ages, i.e., 3, 7, and 28 days, were, 24.36, 28.35, and 36.83 MPa, respectively, with 5% replacement of waste paper pulp ash for OPC, and for PPC, all percentage replacements showed reduction in compressive strength than the control mix. The water absorption of concrete was increased with increasing the percentage of waste paper pulp ash than control concrete. The control concrete clearly has the lowest resistance to 2% sulfuric acid solution compared to blended concrete of OPC‐WPPA and PPC‐WPPA. The cost comparison indicates that the incorporation of waste paper pulp ash decreases the cost of concrete and WPPA and saves raw materials used in cement and concrete production.
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DOI: 10.1155/2022/8880196
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