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  Scopus ID: 21100926589

Technical Feasibility of Water Treatment Plant Sludge with Nano Silica as Concrete Paver Block

B. Hemalatha, G. Shyamala, M. Dinesh Babu and V. Pramila


This study examines the viability of incorporating water treatment plant ash (WTPS) with cement concrete paving blocks. The production of cement concrete sludge blocks (CCSB) can be achieved by the dry mix method, which involves the use of a concrete mixture with little slump. Extensive evaluation was conducted on the mechanical and durability qualities of CCSB with varied replacement ratios of sand by oven dried WTPS. Several tests have been undertaken and analyzed, including compressive strength, abrasion resistance, water absorption, sulfate attack and ultrasonic pulse velocity (UPV). In the laboratory, a series of eight mixtures were created using varying proportions of WTPS contents in CCSB. These proportions included 0%, 5%, 10%, 15%, 20%, 25%, 30%, and 35%, which corresponded to the mixtures labelled as CCSB0, CCSB5, CCSB10, CCSB15, CCSB20, CCSB25, CCSB30, and CCSB35, respectively. Polypropylene fiber has been employed within the construction industry as a supplementary reinforcement material, serving to effectively manage cracks, enhance structural strength and durability against impact and abrasion, and contribute to an overall improvement in the building quality. As nano silica has better engineering properties it is added in 2% in all the composition to enhance the engineering properties of concrete. A notable decline in strength was found when larger concentrations of WTPS (15% and 20%) were employed, which can be attributed to the presence of a more porous structure and more organic matter in WTPS. Therefore, it is possible to utilize water treatment plant sludge as a substitute for 10% of the fine aggregate.

Published on: March 11, 2024
doi: 10.17756/nwj.2024-s1-009
Citation:Hemalatha B, Shyamala G, Dinesh babu M, Pramila V. 2024. Technical Feasibility of Water Treatment Plant Sludge with Nano Silica as Concrete Paver Block. NanoWorld J 10(S1): S42-S47.

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