sampling hot mix asphalt cp-41

Question 1

care shall be taken in sampling to avoid ___________ of the material being sampled

Answer 1

segregation

Question 2

care shall also be taken to prevent contamination by __________ or other _______ _______

Answer 2

dust foreign matter

Question 3

samples used for acceptance or assurance testing shall be taken by who?

Answer 3

the contractor or his representative

Question 4

who shall be present during acceptance or assurance sampling procedure?

Answer 4

cdot representative

Question 5

cdot reserves the right to designate what?

Answer 5

the method and location of material to be sampled

Question 6

what kind of container is used for samples?

Answer 6

3 to 4 gallon capacity 30 gauge non-galvinized metal with a bail type handle and tight fitting lid

Question 7

two method of samples from batch plants and silos

Answer 7

during discharge swing arm through stream and prior to discharge center sample tube under discharge flow

Question 8

sampling from the windrow prior to laydown

Answer 8

three or more locations remove from one side of windrow with square scoop or shovel from bottom to top to avoid segregation

Question 9

sampling from paving machine augers

Answer 9

while paver is in motion observe the operation of augers they should be operating 80 percent or more of the time and be two thirds covered if not sample could be segregated and should be avoided if good conditions are right insert flat scoop or shovel obtain 3 samples remove with minimal loss

Question 10

sampling behind the paver

Answer 10

prior to compaction obtain 3 samples using square scoop or shovel whose quantity equals or exceeds minimum recommended full depth excluding underling material after compaction same as before but sample shall be removed by sawing or coring