Laboratory Report Questions 1 What are the soil specimen den

Laboratory Report Questions 1. What are the soil specimen densities for the six 2. What is the angle of internal friction of the tested reported tests? sand. Show your calculation. Is your result reasonable? 3. We are testing clean sand (i.e., no cohesion) for this lab exercise. Is your result showing there is a cohesion (y-intercept) on the Mohr-Coulomb failure envelope? If yes, where is the ‘cohesion\' comes from? 4. What is the different between direct shear test and simple shear test for soil testing?

Solution

3)

In Mohr- Circle Graph, Y section intercept depends on types of tests. Like for UU test there is always be a y-axis interscept. Or other possibilityis material is over consolidated.

4)

a) In direct shear test, failoure plane is predefined but in simple shear test failoure plane is weakest plane.

b) exact field condition can be simulated in simple shear test but can\'t in direct shear test.

plz comment for any query.