Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Reuse Potential of Drinking Water Treatment Plant Sludge for the Manufacture of Concrete Paving Blocks
This research intends to identify the reuse potential of drinking water treatment plant (DWTP) sludge in concrete paving blocks (CPB). In the current market, the traditional fine aggregate (sand) is completely replaced by quarry dust (QD) due to the increased price and sand mining issues. This study will discuss the suitability of DWTP sludge as an alternative to fine aggregate for the manufacturing of CPB considering the seasonal variation of DWTP sludge. CPBs were cast with the dried WTPS from the Ulapone water treatment plant. The fine aggregate was replaced with WTPS in 30, 40, and 50% by mass (w/w). In addition, Sika Plast®-208 PC (Sika), a high-range water-reducing admixture for early strength concrete was added to every 100 g of cement in the range of 1.0–2.0 ml as per the manufacturer’s recommendation. The control sample was cast with the mass mix ratio of 1:2:4 (cement: QD: coarse aggregate). The water/cement (w/c) ratio was varied within the range of 0.5–1.0 in every mix. Compressive strength tests were conducted on the cast samples after 7 days of curing. The 30, 40 and 50% DWTP sludge replaced mix attained 14.08 MPa at 0.6w/c, 14.26 MPa at 0.8w/c and 11 MPa at 0.75w/c, respectively, where the required compressive strength for Class-4 CPB is 15 MPa as per the SLS 1425 Part 2:2011. In the future, the possibility of replacing 50% DWTP sludge with quarry dust can be investigated along with compressive strength tests and durability checks.
Reuse Potential of Drinking Water Treatment Plant Sludge for the Manufacture of Concrete Paving Blocks
This research intends to identify the reuse potential of drinking water treatment plant (DWTP) sludge in concrete paving blocks (CPB). In the current market, the traditional fine aggregate (sand) is completely replaced by quarry dust (QD) due to the increased price and sand mining issues. This study will discuss the suitability of DWTP sludge as an alternative to fine aggregate for the manufacturing of CPB considering the seasonal variation of DWTP sludge. CPBs were cast with the dried WTPS from the Ulapone water treatment plant. The fine aggregate was replaced with WTPS in 30, 40, and 50% by mass (w/w). In addition, Sika Plast®-208 PC (Sika), a high-range water-reducing admixture for early strength concrete was added to every 100 g of cement in the range of 1.0–2.0 ml as per the manufacturer’s recommendation. The control sample was cast with the mass mix ratio of 1:2:4 (cement: QD: coarse aggregate). The water/cement (w/c) ratio was varied within the range of 0.5–1.0 in every mix. Compressive strength tests were conducted on the cast samples after 7 days of curing. The 30, 40 and 50% DWTP sludge replaced mix attained 14.08 MPa at 0.6w/c, 14.26 MPa at 0.8w/c and 11 MPa at 0.75w/c, respectively, where the required compressive strength for Class-4 CPB is 15 MPa as per the SLS 1425 Part 2:2011. In the future, the possibility of replacing 50% DWTP sludge with quarry dust can be investigated along with compressive strength tests and durability checks.
Reuse Potential of Drinking Water Treatment Plant Sludge for the Manufacture of Concrete Paving Blocks
Lecture Notes in Civil Engineering
Dissanayake, Ranjith (Herausgeber:in) / Mendis, Priyan (Herausgeber:in) / Weerasekera, Kolita (Herausgeber:in) / De Silva, Sudhira (Herausgeber:in) / Fernando, Shiromal (Herausgeber:in) / Konthesingha, Chaminda (Herausgeber:in) / Gajanayake, Pradeep (Herausgeber:in) / Sajitthan, S. (Autor:in) / Rajapakshe, E. P. (Autor:in) / Illangasinghe, I. M. W. K. (Autor:in)
International Conference on Sustainable Built Environment ; 2022 ; Yogyakarta, Indonesia
10.08.2023
15 pages
Aufsatz/Kapitel (Buch)
Elektronische Ressource
Englisch
Compressive strength , Concrete paving block , Reuse of sludge , Water/cement ratio , Water reducing admixture , Water treatment plant sludge Energy , Sustainable Architecture/Green Buildings , Environmental Policy , Sociology, general , Energy Policy, Economics and Management , Building Construction and Design , Sustainable Development , Engineering
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Concrete Paving Blocks: An Overview
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