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Register a new userDesign and development of cell Oedometer device for measuring the volumetric changes resulting from temperature change
تصميم و تطوير خلية جهاز الأدومتر لقياس التغيرات الحجمية الناتجة عن تغير درجة الحرارة
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من المهم جداً تصميم و تطوير المواد العازلة الطبيعية التي تستخدم في تكتيم مواقع ردم النفايات الصلبة، و تستخدم الترب الغضارية أو مزيج من هذه الترب و بعض الاضافات كطبقة تكتيم في إنشاء مواقع ردم النفايات , و يعتبر معامل نفاذية المواد المستخدمة في نظام التكتيم من أهم العوامل لمنع تسرب المياه إلى جسم ردم موقع النفايات و لمنع تسرب الرشاحة إلى البمياه الجوفية و الترب المحيطة بمواقع ردم النفايات . في هذا البحث تم تطوير و تصميم خلية جهاز الأدومتر لدراسة التشوهات الحجمية الحاصلة في هذه الترب نتيجة تعرض هذه الترب للظروف المناخية أثناء تنفيذ الطبقة الكتيمة أو بعد تنفيذها نتيجة ارتفاع درجات الحرارة في مواقع الردم بسبب التفاعلات البيولوجية الحاصلة فيها. فقد تم تعديل و تطوير خلية جهاز الأدومتر لتصبح خلية حرارية بحيث يتم التحكم بدرجة الحرارة المطبقة على العينة في حلقة الجهاز و من ثم قياس التغيرات الحجمية الحاصلة في العينة , و تم ربط نظام اختبار النفاذية بضاغط متغير مع الحلقة لقياس نفاذية العينة و تم ربط نظام اختبار النفاذية بضاغط متغير مع الحلقة لقياس نفاذية العينة و تم وصلها مع نظام تحكم و قياس و إظهار رقمي لدرجة الحرارة و الحمولة و الإزاحة .
It is very important to the design and development of natural isolating materials Which are used in the cover-up of solid waste landfill, clay soils or mixtures of these soils and some additions used as an impermeable liner for construction of solid waste landfill, The permeability coefficient of the materials used in the impermeable system is the most important factors to prevent water leakage into the body of landfill site and to prevent the Leachate of leak into groundwater and soil surrounding the landfillsites. In this research has been the development and design Oedometer cell to study volumetric distortions occurring in these soils as a result of exposure of these soils to climatic conditions during the implementation of impermeable layer or after implementation due to rising temperatures in landfill because of biological interactions taking place at these landfill. It has been modified and the development of Oedometer cell to become a thermal cell So that it can control the degree of heat applied to the sample in the ring of device and then measure the volumetric changes in the sample, Oedometer cell has been linked to the permeability test system with variable head to measure the permeability of the testing sample, It was connected with the digital control , measuring and showing system for temperature and load and displacement.
References used
El-Fadel, M., Findikakis, N. A., Leckie, O.J. (1997). Environmental Impacts of Solid Waste Landfilling. Journal of Environmental Management, 50, 1-25
EU (1999). European Union, Council Directive 1999/31/EC of 26 April 1999 on the landfillling of waste. Official Journal of European Communities, L 182/1-19, 16 July 1999. pp 0001- 0019. EU web-site: EUR-Lex: Community legislation in force – Document 399L0031. http://europa.eu.int/eurlex/ en/lif/dat/1999/en_399L0031.html 000807
Jesionek, K.S., Dunn, R.J., Daniel, D.E. (1995). Evaluation of landfill final covers. In: T.H. Christensen, R. Cossu, and K. Stegmann (eds.): Sardinia 95, Proceedings of the Fifth International Landfill Symposium. CISA, Cagliari, Italy. II, pp. 509-536
Kämpf, M., Montenegro, H. (1997). Assessing the effectiveness of capillary barriers. In: T.H. Christensen, R. Cossu, and K. Stegmann (eds.): Sardinia 97, Proceedings of the Sixth International Landfill Symposium. CISA, Cagliari, Italy. III, pp. 421-428
Rowe,R.K., Sangam, H. P., and Lake, C.B., (2003). “Evaluation of an HDPE geomembrane after 14 years as aleachate lagoon liner”. Canadian Geotechnical J., 40, pp. 536-550
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