Academic Journal
Recycled wastewater treatment plant sludge as a construction material additive to ecological lightweight earth bricks
| العنوان: | Recycled wastewater treatment plant sludge as a construction material additive to ecological lightweight earth bricks |
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| المؤلفون: | Houssame Limami, Imad Manssouri, Khalid Cherkaoui, Asmae Khaldoun |
| المصدر: | Cleaner Engineering and Technology, Vol 2, Iss , Pp 100050- (2021) |
| بيانات النشر: | Elsevier, 2021. |
| سنة النشر: | 2021 |
| المجموعة: | LCC:Renewable energy sources LCC:Environmental engineering |
| مصطلحات موضوعية: | Recycled wastewater treatment sludge, Porosity, Capillary water absorption coefficient, Compressive strength, Acidity, Thermal performance, Renewable energy sources, TJ807-830, Environmental engineering, TA170-171 |
| الوصف: | 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. |
| نوع الوثيقة: | article |
| وصف الملف: | electronic resource |
| اللغة: | English |
| تدمد: | 2666-7908 |
| Relation: | http://www.sciencedirect.com/science/article/pii/S2666790821000100; https://doaj.org/toc/2666-7908 |
| DOI: | 10.1016/j.clet.2021.100050 |
| URL الوصول: | https://doaj.org/article/0bd5beb2dfc042b1bef65bb7f043d0b4 |
| رقم الانضمام: | edsdoj.0bd5beb2dfc042b1bef65bb7f043d0b4 |
| قاعدة البيانات: | Directory of Open Access Journals |
Full Text Finder | تدمد: | 26667908 |
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| DOI: | 10.1016/j.clet.2021.100050 |