I am building a stone and mortar perimeter wall around a military base. All of the mortar is testing good at 7 days as I wait for the 28 day results. That is except for the first days mortar where the strenth is 500psi at 7 days vs 900-1100 psi at seven days for subsequent day's samples. The...
I have taken your advice and uploaded a collection I had put together of all references to grading and compaction in the SOW. There is no specification talking about grading, compaction, earthwork, or anything similar. The grading contractor is performing cuts in excess of several meters and...
The contract calls for the contractor completing the grading portion of his work and then he will be given a new contract to come back later to perform the compaction. The spec calls for 95% compaction everywhere with a requirment that the backfilling happen in lifts of 15cm(6 in). How can you...
I am working on a Corps of Engineers project where every reference to backfilling calls for achieving 95% of a modified proctor. The grading contractor has a contract for grading but not for backfilling. In the cut and fill of grading, doesn't this contractor have to achieve the 95% compaction...
I appreciate everyone's comments. They are in agreement with my feelings on the subject. While moisture above optimum might pose a problem if you experience pumping and the soil never really compacts and I don't recommend working in these conditions. However, as long as you can achieve the...
BigH: Thank you for responding to my query. I am actually building a military base near Jalalabad, Afghanistan. I would describe the soil as very granular with a lot of rocks in it. The value of the modified proctor came out at 224.5 kg/meter cubed at a moisture content of 6.5%. In the...
I am working on a project where I have to compact my soil to 95% of a modified proctor within a moisture range of + or - 1.5%. In my case this works out to 5% to 8%. I am having trouble increasing the moisture percentage to above 5%. Besides having to perform more work to achieve compaction...
