عنوان المقالة:تاثير الغمر على التربة الجبسية غير المشبعة Effect of Soaking on Unsaturated Gypseous Sand Soils
أ.د. محمد شاكر محمود | Prof. Dr. Mohammed Shakir Mahmood | 10167
نوع النشر
مجلة علمية
المؤلفون بالعربي
المؤلفون بالإنجليزي
Mustafa M. Abdal Husain, Ali Akhtarpour and Mohammed Shaker Mahmood
الملخص الانجليزي
This paper shows the difference in the volumetric strains between the Oedometer tests with different soaking durations and the unsaturated triaxial tests. The disturbed samples were taken from Al-Najaf city in Iraq. All specimens have the same high gypsum content of 29 %. For Oedometer tests, the specimens are tested in the different soaking durations; the first is in natural moisture content then a half-hour, one week and two weeks. While in triaxial tests, a wetting induce has been conductive to estimate the volumetric strains under two stress levels (2.5 and 5 kg/í µí±í µí±š 2) with the presence of matric suction in four levels; initial matric suction (ψo), 0.6 ψo, 0.3 ψo and zero ψ. The results from unsaturated triaxial tests indicate that the volumetric strains are increased as matric suction decreased and the trend of stress-strain curve became steep. While from Oedometer tests, when the specimen is soaked in natural and for a half-hour, the volumetric strains are not significantly changed and close to the high matric suction. When the soaking time is increased to one week, there is a relative increase in volumetric strains. But after two weeks soaking in the Oedometer cell, the volumetric strains are very clear in increasing and close to the volumetric strains from unsaturated tests in low matric suction.
تاريخ النشر
05/01/2019
الناشر
International Journal of Civil Engineering and Technology
رقم المجلد
10
رقم العدد
5
الصفحات
550-558
رابط خارجي
https://www.researchgate.net/publication/333377061_Effect_of_Soaking_on_Unsaturated_Gypseous_Sand_Soils
الكلمات المفتاحية
Oedometer, Unsaturated Triaxial, Matric Suction, Volumetric Strain
رجوع