SECTION 401
Appendix A
NHDOT Test Procedure B-7
Sampling Bituminous Paving Mixtures For Acceptance Testing
Sample shall be taken behind the paver after placement and before compaction.
Sample location is randomly selected by the Contract Administrator.
When paving over aggregate base course or cold planed surface, use a rectangular metal plate no less than 12” each side.
Center plate on sample location.
After paver passes over plate, measure back to sample location.
Locate the edges of the plate.
Using a flat-bottomed scoop large enough to obtain up to a 3000 gram sample. Place scoop on plate and push across the mat
(perpendicular to the center line), through the center of the plate, filling the scoop to obtain the sample size specified below.
Required Sample Size
Base Courses 2000-3000 grams
~ Binder Courses ~~ 1500-3000 grams
~ Surface Courses ~~ 1000-3000 grams"
“Sand Courses ———~*~S~=«S 00-3000 grams
When sampling over an existing pavement the plate is not required.
NHDOT Procedure B-8
Sampling and Testing
Procedure for In Place Air Voids
Cores will be taken at random locations selected by the Contract Administrator.
Cores will be delivered intact by the Contractor to the NHDOT inspector at the testing laboratory.
If Cores are lost or damaged, new cores shall be taken at the same location as the previous core.
Cores shall be measured for thickness following ASTM D 3549.
Bulk specific gravity shall be determined by AASHTO T 166a.
Maximum Theoretical Density will be determined using the core by AASHTO T 209.
In Place Air Voids shall be determined by AASHTO T 2.
2016 NHDOT
Go To=) TOC Division 100 Division 200 Division 300 Division 400 Standard
Division 300 = Division 600 Division 700 Specifications
