Recycled wastewater treatment plant sludge as a construction material additive to ecological lightweight earth bricks
Sludge disposal has major drawbacks on the environment when damping wastewater treatment sludge in landfills and estuaries. In addition to financial drawbacks manifested by the poor sludge management due to the lack of valorization regulations or investments’ encouragement. This paper analyzes the m...
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| Format: | Article |
| Language: | English |
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Elsevier
2021-06-01
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| Series: | Cleaner Engineering and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666790821000100 |
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| author | Houssame Limami Imad Manssouri Khalid Cherkaoui Asmae Khaldoun |
| author_facet | Houssame Limami Imad Manssouri Khalid Cherkaoui Asmae Khaldoun |
| author_sort | Houssame Limami |
| collection | DOAJ |
| description | Sludge disposal has major drawbacks on the environment when damping wastewater treatment sludge in landfills and estuaries. In addition to financial drawbacks manifested by the poor sludge management due to the lack of valorization regulations or investments’ encouragement. This paper analyzes the mechanical, physicochemical, and thermal properties of earth bricks of unfired type thanks to their low energy demand and high energy savings’ potential. This enables promoting a cleaner production protocol in accordance to the Moroccan testing standards in the building sector. X-ray Diffraction and Fluorescence analysis of the earth and sludge deployed reflected a dominance in Quartz (SiO2) with a respective 59.6% and 28.37%. This affirms the high clayey composition in the used earth material. Various sludge additive percentages (0%, 1%, 3%, 7%, 15% and 20%) to earth material, by weight, are investigated. Higher sludge content in the brick samples’ matrix produced more porous specimens, up to 17%, compared to control samples, of 0% additive content, with 1.04% porosity level. This resulted in higher capillary water absorption coefficient 47.15 g/(cm2.min0.5) and lower compressive strength 3.95 MPa compared to reference values, of 0% additive, of 25.10 g/(cm2.min0.5) and 6.17 MPa, respectively. In addition, bulk density analysis classified produced brick samples as lightweight construction materials, following the Moroccan testing standards. This is due to specimens’ respective bulk density does not go beyond the 1.75 g/cm3 mark. Improvements in thermal performance were also recorded with 43% and 30% gains in thermal conductivity and specific heat capacity properties, respectively, compared to control samples. Moreover, the incorporation of sludge additive into the clayey earth matrix has shown a decrease in the mixtures’ pH level. This resulted in producing more porous brick samples with improved thermal properties and lower mechanical compressive strength due to deterioration. |
| first_indexed | 2024-12-22T11:47:57Z |
| format | Article |
| id | doaj.art-0bd5beb2dfc042b1bef65bb7f043d0b4 |
| institution | Directory Open Access Journal |
| issn | 2666-7908 |
| language | English |
| last_indexed | 2024-12-22T11:47:57Z |
| publishDate | 2021-06-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Cleaner Engineering and Technology |
| spelling | doaj.art-0bd5beb2dfc042b1bef65bb7f043d0b42022-12-21T18:27:06ZengElsevierCleaner Engineering and Technology2666-79082021-06-012100050Recycled wastewater treatment plant sludge as a construction material additive to ecological lightweight earth bricksHoussame Limami0Imad Manssouri1Khalid Cherkaoui2Asmae Khaldoun3Laboratory of Mechanics, Mechatronics, and Command, Team of Electrical Energy, Maintenance and Innovation, ENSAM-Meknes, Moulay Ismail University, Meknes, Morocco; Laboratory of Sustainable Energy Materials, Al Akhawayn University, Ifrane, Morocco; Corresponding author. Laboratory of Mechanics, Mechatronics, and Command, Team of Electrical Energy, Maintenance and Innovation, ENSAM-Meknes, Moulay Ismail University, Meknes, Morocco.Laboratory of Mechanics, Mechatronics, and Command, Team of Electrical Energy, Maintenance and Innovation, ENSAM-Meknes, Moulay Ismail University, Meknes, MoroccoLaboratory of Mechanics, Mechatronics, and Command, Team of Multi-disciplinary Engineering and Mechatronic Systems, ENSAM-Meknes, Moulay Ismail University, Meknes, MoroccoLaboratory of Sustainable Energy Materials, Al Akhawayn University, Ifrane, MoroccoSludge disposal has major drawbacks on the environment when damping wastewater treatment sludge in landfills and estuaries. In addition to financial drawbacks manifested by the poor sludge management due to the lack of valorization regulations or investments’ encouragement. This paper analyzes the mechanical, physicochemical, and thermal properties of earth bricks of unfired type thanks to their low energy demand and high energy savings’ potential. This enables promoting a cleaner production protocol in accordance to the Moroccan testing standards in the building sector. X-ray Diffraction and Fluorescence analysis of the earth and sludge deployed reflected a dominance in Quartz (SiO2) with a respective 59.6% and 28.37%. This affirms the high clayey composition in the used earth material. Various sludge additive percentages (0%, 1%, 3%, 7%, 15% and 20%) to earth material, by weight, are investigated. Higher sludge content in the brick samples’ matrix produced more porous specimens, up to 17%, compared to control samples, of 0% additive content, with 1.04% porosity level. This resulted in higher capillary water absorption coefficient 47.15 g/(cm2.min0.5) and lower compressive strength 3.95 MPa compared to reference values, of 0% additive, of 25.10 g/(cm2.min0.5) and 6.17 MPa, respectively. In addition, bulk density analysis classified produced brick samples as lightweight construction materials, following the Moroccan testing standards. This is due to specimens’ respective bulk density does not go beyond the 1.75 g/cm3 mark. Improvements in thermal performance were also recorded with 43% and 30% gains in thermal conductivity and specific heat capacity properties, respectively, compared to control samples. Moreover, the incorporation of sludge additive into the clayey earth matrix has shown a decrease in the mixtures’ pH level. This resulted in producing more porous brick samples with improved thermal properties and lower mechanical compressive strength due to deterioration.http://www.sciencedirect.com/science/article/pii/S2666790821000100Recycled wastewater treatment sludgePorosityCapillary water absorption coefficientCompressive strengthAcidityThermal performance |
| spellingShingle | Houssame Limami Imad Manssouri Khalid Cherkaoui Asmae Khaldoun Recycled wastewater treatment plant sludge as a construction material additive to ecological lightweight earth bricks Cleaner Engineering and Technology Recycled wastewater treatment sludge Porosity Capillary water absorption coefficient Compressive strength Acidity Thermal performance |
| title | Recycled wastewater treatment plant sludge as a construction material additive to ecological lightweight earth bricks |
| title_full | Recycled wastewater treatment plant sludge as a construction material additive to ecological lightweight earth bricks |
| title_fullStr | Recycled wastewater treatment plant sludge as a construction material additive to ecological lightweight earth bricks |
| title_full_unstemmed | Recycled wastewater treatment plant sludge as a construction material additive to ecological lightweight earth bricks |
| title_short | Recycled wastewater treatment plant sludge as a construction material additive to ecological lightweight earth bricks |
| title_sort | recycled wastewater treatment plant sludge as a construction material additive to ecological lightweight earth bricks |
| topic | Recycled wastewater treatment sludge Porosity Capillary water absorption coefficient Compressive strength Acidity Thermal performance |
| url | http://www.sciencedirect.com/science/article/pii/S2666790821000100 |
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