ATT Moisture Content & Specific Gravity

Question 1

Which ASTM standard is used to determine the moisture content of aggregates?

Accepted Answer

ASTM C566

Answer

ASTM C127

Answer

ASTM C128

Answer

ASTM C29

Question 2

What condition must fine aggregate be in to determine surface moisture?

Accepted Answer

Saturated surface-dry

Answer

Air dry

Answer

Wet

Answer

Oven dry

Question 3

What is the purpose of determining specific gravity of aggregates?

Accepted Answer

To measure density and absorption

Answer

To find aggregate color

Answer

To estimate compressive strength

Answer

To check gradation

Question 4

Which test method determines the specific gravity of coarse aggregates?

Accepted Answer

ASTM C127

Answer

ASTM C29

Answer

ASTM C117

Answer

ASTM C136

Question 5

What is the correct sequence of aggregate moisture conditions from driest to wettest?

Accepted Answer

Oven dry, air dry, SSD, wet

Answer

Wet, SSD, air dry, oven dry

Answer

Air dry, wet, oven dry, SSD

Answer

SSD, oven dry, air dry, wet

Question 6

Why is SSD condition critical in concrete mix design?

Accepted Answer

To account for water absorption accurately

Answer

To prevent evaporation of water

Answer

To control concrete temperature

Answer

To ensure proper cement hydration