Effect of water-to-cement ratio and curing method on the strength, shrinkage and slump of the biosand filter concrete body
| العنوان: | Effect of water-to-cement ratio and curing method on the strength, shrinkage and slump of the biosand filter concrete body |
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| المؤلفون: | Nicole Chan, Candice Young-Rojanschi, Simon Li |
| المصدر: | Water Science and Technology. 77:1744-1750 |
| بيانات النشر: | IWA Publishing, 2018. |
| سنة النشر: | 2018 |
| مصطلحات موضوعية: | Cement, Environmental Engineering, Construction Materials, 030231 tropical medicine, Water, 010501 environmental sciences, Concrete slump test, Pulp and paper industry, 01 natural sciences, Water Purification, Slump, 03 medical and health sciences, 0302 clinical medicine, Water Supply, Biosand filter, Environmental science, Water treatment, Filtration, Curing (chemistry), 0105 earth and related environmental sciences, Water Science and Technology, Shrinkage |
| الوصف: | The biosand filter is a household-level water treatment technology used globally in low-resource settings. As of December 2016, over 900,000 biosand filters had been implemented in 60 countries around the world. Local, decentralized production is one of the main advantages of this technology, but it also creates challenges, especially in regards to quality control. Using the current recommended proportions for the biosand filter concrete mix, slump was measured at water-to-cement ratios of 0.51, 0.64 and 0.76, with two replicates for each level. Twenty-eight-day strength was tested on four replicate cylinders, each at water-to-cement ratios of 0.51, 0.59, 0.67 and 0.76. Wet curing and dry curing were compared for 28-day strength and for their effect on shrinkage. Maximum strength occurred at water-to-cement ratios of 0.51–0.59, equivalent to 8–9.3 L water for a full-scale filter assuming saturated media, corresponding to a slump class of S1 (10–40 mm). Wet curing significantly improved strength of the concrete mix and reduced shrinkage. Quality control measures such as the slump test can significantly improve the quality within decentralized production of biosand filters, despite localized differences in production conditions. |
| تدمد: | 1996-9732 0273-1223 |
| DOI: | 10.2166/wst.2018.063 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::77a00dbe7d8bcec75fca79a531302e3d https://doi.org/10.2166/wst.2018.063 |
| Rights: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....77a00dbe7d8bcec75fca79a531302e3d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 19969732 02731223 |
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| DOI: | 10.2166/wst.2018.063 |