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We selected the shaly sandstone at the rock slope of the Three Gorges Reservoir area in China where water level varies (the water level-fluctuating zone) in order to study the effect of dry–wet cycles on strength deterioration and micro-structure changes of shaly sandstone. After n dry–wet cycles (n being the number of cycles, with a value of 0, 1, 5, 10, 15, and 20), the shaly sandstone samples were...
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