We are performing field permeability testing roughly following Method B of ASTM D6391-11. I am trying to decide between Method B Calculation Procedure 1 and Calculation Procedure 2 (Sect 9.4, p. 12). I have run through the example provided in Fig 5 using both procedures and am getting a more...
The static groundwater is definitely below the test depths as we have not encountered any groundwater in our borings. Based on the hydrogeologic data we have, it is about 60 ft below where we are running the perm tests.
I will have to look more into the cementation and clay-fines...
I have been performing in-situ permeability tests in the field and have sporadically been getting permeability coefficients that have been inconsistent with the soil type.
The onsite soils are generally dense to very dense glacial end moraine and outwash deposits of gravel and sand with...
I will be performing density testing for backfill being placed behind foundation walls and I have been fighting with the contractor over lift thickness. The contractor wants to place the backfill in 12 inch lifts; however, I don’t want the contractor to do so because the excavations are so...
