@ BigH,
Thx for your reply.
1. we're using ASTM standards all around the country.
2. I have witnessed the test in their lab. But not in detail. We know they have soaked the sample for 4 days. I went the day that they were doing the CBR test. Saw them getting the test samples out of the water...
Dear Fattdad,
Thx for your quick reply. That's the problem. Im from a small third world country in south-america. We dont have AMRL- approved labs, not any certified lab or lets say not yet. There may be one in the area (Brasil or the caribbean) but that would cost a lot of money and that's sth...
I am testing a well graded sand. Normally it's CBR value varies from 15% - 40% when tested. However the contractor with who I work always achieves above 30%. Including values of near the 70%. It's rare that sand achieves such high CBR values.
But lately the contractor only sends CBR values at...
