The following changes in the thickness of a clay sample were recorded during a loading stage...

 

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The following changes in the thickness of a clay sample were recorded during a loading stage of a consolidation test: Time (min) 0.00 0.04 0.25 0.50 1.00 2.25 4.00 6.25 9.00 Change in thickness 0.00 0.121 0.233 0.302 0.390 0.551 0.706 0.859 0.970 (mm) Time (min) 12.25 16.00 25.00 36.00 64.00 100 360 1440 Change in thickness 1.065 1.127 1.205 1.251 1.300 1.327 1.401 1.440 (mm) At the end of the 1440 min the thickness of the specimen was 17.53 mm, the stress had been increased by 100 kN/m² and the water content was 24.7%. The specific gravity of the soil was 2.70. 1. Using the square root of time method, determine: a. The coefficient of consolidation of the tested clay b. The coefficient of volume compressibility c. The permeability of the soil 2. Determine the coefficient of consolidation using the logarithm of time method The following changes in the thickness of a clay sample were recorded during a loading stage of a consolidation test: Time (min) 0.00 0.04 0.25 0.50 1.00 2.25 4.00 6.25 9.00 Change in thickness 0.00 0.121 0.233 0.302 0.390 0.551 0.706 0.859 0.970 (mm) Time (min) 12.25 16.00 25.00 36.00 64.00 100 360 1440 Change in thickness 1.065 1.127 1.205 1.251 1.300 1.327 1.401 1.440 (mm) At the end of the 1440 min the thickness of the specimen was 17.53 mm, the stress had been increased by 100 kN/m² and the water content was 24.7%. The specific gravity of the soil was 2.70. 1. Using the square root of time method, determine: a. The coefficient of consolidation of the tested clay b. The coefficient of volume compressibility c. The permeability of the soil 2. Determine the coefficient of consolidation using the logarithm of time method

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1a Square root of time method Coefficient of consolidation cv t90t05 Where t90 is the time ... View the full answer