Materials Lab 6

What are the units of compressive strength?

• lb*in

• lb*(in^2)

• lb/in

• lb/(in^2)

When are we testing the compressive strength of the concrete cylinders?

• 7 days

• 14 days

• 21 days

• 28 days

The steel bearing block in the compressive test machine is used to

• control rotation of the specimen

• control fragment loss

• distribute the load over the cross-sectional area

• maintain a constant cross-sectional area

Match the following Fracture to its number type

• Type 1

• 
• Type 6

• 
• Type 4

• 

Match the following Fracture to its number type

• Type 5

• 
• Type 3

• 
• Type 2

• 

The deliverables of the Concrete Compressive test lab include:

• Density

• Type and sketch of the mode of fracture

• Compressive Strength

• Maximum Load

• Dimensions of the sample

What type of gradation would best describe Superpave gradation?

• Open

• Gap

• Dense

• One-sized

Asphalt binder specification is based on

• Climate

• Strength

• Longevity

• Curing time

The binder for our Superpave mix is PG76-22. Match each descriptor to its definition.

​ (a)  

• 22

• Average 7-day maximum temperature

• PG

• Performance Grade

• 76

• Minimum pavement temperature