T 329 Moisture Content of HMA

Question 1

The moisture content in asphalt mixtures is measured based on the volumes of the wet and dry samples.

Answer 1

False

Question 2

The drying temperature shall fall with the JMF mixing temp range. If a mix temp range is not supplied, a temp of _____________ will be used.

Answer 2

325+- 25 deg F
163+- 14 deg C

Question 3

The size of the test sample shall be a minimum of ________ g.

Answer 3

1000 grams

Question 4

Pan wt.- 302.4g, wet + pan - 1363.3g, Dry + pan - 1360.2g

Answer 4

0.29%

Question 5

to reach constant mass, dry the sample until further drying does not alter the mass by more than _______ percent.

Answer 5

0.05%

Question 6

What temperature should be used to dry an HMA sample for determing moisture?

Answer 6

Mixing temp, or 325+- 25 deg F

Question 7

How long should the HMA dried before initial dry mass is checked?

Answer 7

90 mins +- 5 mins

Question 8

If further drying is required, how often should you check for a constant mass?

Answer 8

intervals of 30 mins +- 5 mins

Question 9

What temperature is the test sample cooled to before determination of dry mass?

Answer 9

Approx. the same temperature as before it was placed in the oven.