CT 205 - Crushed Particles

Question 1

A prerequisite test needed before running CT 205 test is ____________.

Answer 1

CT 202

Question 2

An aggregate face is considered fractured if its projected surface area is at most 25% of the largest cross-sectional area of the aggregate.

Answer 2

False

Question 2

CT 205 describes the procedure for determining the percent of crushed aggregate using an imaging procedure.

Answer 2

False

Question 3

If the aggregates to be tested have an accumulation of fines, aggregate should be washed on a _______________ sieve.

Answer 3

No.8 sieve

Question 4

The percentage of crushed aggregate is determined by _______.

Answer 4

Weight

Question 5

if a sample has both coarse and fine fractions, only the course aggregate portion should be tested.

Answer 5

False

Question 6

What 3 words define a “crushed particle”?

Answer 6

Angular, rough or broken surface

Question 7

What minimum percent of the projected surface area is required for a fractured face?

Answer 7

25%

Question 8

What percent passing on the grading is required to be considered as part of the fractured face test?

Answer 8

5% or more

Question 9

Split sample down to within what percent of indicated test weight?

Answer 9

10%

Question 10

What sieve should be used to wash sample of fines?

Answer 10

No. 8