Recent content by Stoph

Is there a 64-bit compatible software that determines ultimate vertical static pile capacity using FHWA methods similar to Driven 1.2? The closed thread, thread274-174559, led me to UniPile which stated that it uses the Fellenuis Unified Method. Are there any others? Thanks in advance.

Snagglespree, we encounter this often when we test ODOT #304 (a well-graded granular base material). While I believe that this type material should only be tested with a roller pass test section, we still provide a starting optimum moisture content to the contractor using AASHTO T-99. I have...

Acker Drill company has the 2 1/2" OD size and others. We've used them for years. www.ackerdrill.com

Here is a link to an excellent paper on this topic. Unfortunately, here in Ohio, we cannot use sand backfill due to groundwater quality policies on sealing a borehole. http://www.slopeindicator.com/pdf/papers/grout-backfill.pdf

Your mixture sounds correct. But I think what IANDIG was referring to is the fact that you only use 50 mL of the 40 g/L sodium hex mixture per cylinder. The rest is either deionzied or distilled water.

However, the spec says to take readings at different time intervals, not just the initial.

ASTM D 4767-04 under section 8.3.3 During the consolidation phase the spec says to "record the accompanying deformation indicator readings by carefully bringing the piston in contact with the specimen cap." With 60 to 80 psi cell pressure, it takes all the strength I can muster to push down...

I would agree with the "let it bleed" option if the water were clear, but this bleed water is typically not which means that the few fines that you do have in these materials are washing out with each successive test point. So the material changes, which is a change in specific gravity, which...

While I agree with DGillette completely, some agencies still require standard proctor on these poorly graded sands and gravels when used as fill or backfill. To deal with the bleeding between the bottom of the mold and the base plate, I use a little vacuum grease around the base of the mold...

http://www.gintsoftware.com/

ASTM D 3080...The loading depends on the consolidation pressure needed to simulate field conditions, and the specimen size varies based on the maximum particle size in the sample. See the ASTM (or in my DOT case AASHTO T-236) for details.

I have occasionally seen the Sand Cone called a Wet Density method, but it doesn't sound like this what they are referring to in this case.

AASHTO T-216, Section 6.1 Load Device says "...should permit quick application of a given load increment without significant impact." AMRL must be assuming that a screw arm is the only way to accomplish this because their own inspection worksheet only states that Load Device "permits quick...

Ohio requires 8 years experience with a Engineering Technology degree.

http://www.dot.state.oh.us/construction/OCA/Specs/SSandPN2005/10160402for2005.pdf See above link for the specification in question. Does anyone know what purpose the ammonium carbonate serves in this instance? I have ran Organic samples in a muffle furnace per AASHTO T-267, which uses a lower...