T 255 Total Evaporable Moisture Content of Agg

Question 1

T 255 provides a method of determining the evaporable moisture content of aggregate by drying moisture from particle surfaces only.

Answer 1

False

Question 2

After obtaining a representative sample, protect the sample against loss of _____________ prior to determing the inital mass.

Answer 2

Moisture

Question 3

665.1g original wt, 644.5g dried wt. Determine the total evaporable moisture content of the sample to the nearest 0.1%:

Answer 3

3.2%

Question 4

The mass of the dried sample (D) must be measured in grams to the nearest_________.

Answer 4

0.1%

Question 5

Pan weight - 244.3g, wet wt + pan-776.6g, Dry wt + pan-753.2g. Determine the total evaporable moisture.

Answer 5

4.6%

Question 6

What is the min. sample size when determining the moisture content of a 3/4” nominal sized aggregate?

Answer 6

3000 g

Question 7

What is the minimum sample size when determining the moisture content of fine agg?

Answer 7

500 g

Question 8

To what condition must the sample be dried to?

Answer 8

Constant mass, thoroughly dry, when further drying would cause less than 0.1% loss in mass.