TY - JOUR
T1 - Assessment of crushed shales for use as compacted landfill liners
AU - Mohamedzein, Yahia E.A.
AU - Al-Rawas, Amer A.
AU - Al-Aghbari, Mohammed Y.
AU - Qatan, Ahmed
AU - Al-Rawas, Abdul Hamid
N1 - Funding Information:
The authors gratefully acknowledge the financial support provided by Sultan Qaboos University under the Internal Research No. CE/02/03. The authors thank Mr. Suliman Al-Kindy, Mr. Yaqoub Al-Alawi, Ms. Raya Al-Sharji, Mr. Seif Al-Maamari, Ms. Samira Al-Kharousi, Mr. Mansour Al-Haddabi, Mr. Mohammed H. Mansour and Ms. Muna Al-Amri for their help in the testing program.
PY - 2005/8/30
Y1 - 2005/8/30
N2 - The possibility of using crushed shales as landfill liners is investigated in this study. Two types of shales were studied by performing the following laboratory tests: hydraulic conductivity, compaction, swelling, consolidation, X-ray diffraction (XRD), scanning electron microscope (SEM) and chemical analysis. For both compacted shales, the hydraulic conductivity was in order of 10-7 cm/s or less which satisfies the specifications for landfill liners. The results of XRD and SEM support the low values of the hydraulic conductivity. Because of the dominant presence of low-activity kaolinite, there was no significant change in the hydraulic conductivity when the compacted shales are exposed to calcium chloride solution. The compressibility of the compacted clay was low and no serious post-construction settlement is expected. The shear strength of the compacted shales was within the usual expected range for earthen liners and, therefore, should pose no challenges with respect to shear strength. The crushed shales also satisfy the other criteria related to Atterberg limits and grain size.
AB - The possibility of using crushed shales as landfill liners is investigated in this study. Two types of shales were studied by performing the following laboratory tests: hydraulic conductivity, compaction, swelling, consolidation, X-ray diffraction (XRD), scanning electron microscope (SEM) and chemical analysis. For both compacted shales, the hydraulic conductivity was in order of 10-7 cm/s or less which satisfies the specifications for landfill liners. The results of XRD and SEM support the low values of the hydraulic conductivity. Because of the dominant presence of low-activity kaolinite, there was no significant change in the hydraulic conductivity when the compacted shales are exposed to calcium chloride solution. The compressibility of the compacted clay was low and no serious post-construction settlement is expected. The shear strength of the compacted shales was within the usual expected range for earthen liners and, therefore, should pose no challenges with respect to shear strength. The crushed shales also satisfy the other criteria related to Atterberg limits and grain size.
KW - Compressibility
KW - Hydraulic conductivity
KW - Landfill liners
KW - Oman
KW - Shales
KW - Shear strength
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U2 - 10.1016/j.enggeo.2005.06.001
DO - 10.1016/j.enggeo.2005.06.001
M3 - Article
AN - SCOPUS:24144459119
SN - 0013-7952
VL - 80
SP - 271
EP - 281
JO - Engineering Geology
JF - Engineering Geology
IS - 3-4
ER -