geo lab 2b

geo lab 2b - Introduction The purpose of this lab is to...

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Introduction The purpose of this lab is to perform an Atterberg limit tests on a selected soil that was red moist and had fine particles. Atterberg limit tests are vital when starting new construction on an unknown soil. The reason why we conduct atterberg limit tests is to find out when major changes happen in the soil due to moisture change. To perform this test we will have to run three separate tests which include Liquid Limit, Plastic Limit and shrinkage limit tests in this consecutive order. Liquid limit is calculated by creating sharp shocks to the soil to close a channel made in the soil by the tester and. To find this we count the number of shocks it takes to close the channel and record this number. If it’s higher than 25 we add more water to the soil and if it’s less we add more soil to the mix. Once we achieve a number close to 25 we measure water content. Plastic limit is determined by rolling the soil until it crumbles after reaching a 1/8 inch diameter. For the Shrinkage limit we will estimate it by using the plasticity charts.
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Materials and Equipment Soil: Unknown Color: Red-Brown Moisture: medium to high moisture, soil leaves moisture on out finger when touched. Distribution: Very fine grains, possibly a silt or clay would have to run hydrometer tests
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geo lab 2b - Introduction The purpose of this lab is to...

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