We are building a tunnel that is about 40 feet deep. Ground water has saturated the fat clay subgrade and now the subgrade will not meet the 2000 psf required per the drawings. One option would be to bridge the subgrade by undercutting 12" (This is the max we can undercut, since anything more...
Can two flages be connected using all thread rods instead of machine bolts? Contractor bought 10' long pieces of all thread rods and they cut them on site to use them as bolts to connect flanges and also to connect butterfly valves to flnages. Our specs don't mention anything about the allowable...
We finished laying asphalt (BM 25.0) on Saturday. During the operation everything was done and tested according to VDOT (Roller pattern, control strip, etc). We took core samples the same day and they were test by noon of the following day. I just got the results of the density test performed on...
Concrete pour started at around 8:00 am, Temp that morning was around the 70's and water-cement ratio was 0.45. We were pouring a concrete pier for job under the Army Corps of Engineers job and the were trying to say that we had a cold joint, however, when we stripped the forms we could not see...
I am placing the aggregate base course on a roadway for the Army Corps of Engineers. The ACOE is claiming that the DGA is contaminated because of the silt that traffic has left on the surface. When can we say that the DGA is contaminated? Is there a standard that gives us some parameters? I have...
What is the maximun time that we can have between concrete trucks if we want have a continous concrete placement? I was pouring concrete a week ago and I had a gap between two of the truck of about 45 min. Is there anywhere a definition of continous concrete placement?
