Concrete

Question 1

What are the 4 main ingredients in CONCRETE?

Answer 1

Cement

Water

Fine aggregate

Coarse aggregate

Question 2

What are the 4 ingredients of CEMENT

Answer 2

Limestone rock

Shale rock

aluminum oxide

Iron

Question 3

Strength in concrete is determined by?

Answer 3

The amount of cement in the mix

The cement to water ratio

Question 4

Volume of concrete is ordered in?

Answer 4

m^3

Cubic meter

Question 5

What are different types of ADMIXTURES?

Answer 5

Air (where concrete is exposed to freeze/thaw)

Calcium Chloride “winter heat”

Mid/high range plasticizers (to make it flow better)

Set retarders (to slow down hydration process, used in summer)

Hydration control (to suspend hydration process for up to 72hrs)

Colour

Question 6

What does a cylinder break test determine?

Answer 6

Measures how many MPA’s it takes to break the concrete

The strength of the hardened concrete

Question 7

4 types of materials to make a CONCRETE FORM

Answer 7

Dirt

Wood

Aluminum

Steel

Question 8

What is SCREEDING concrete?

Answer 8

Initial flattening of concrete (by hand or machine)

Question 9

What is the difference between a cylinder and a volumetric concrete truck?

Answer 9

cylinder truck: concrete gets batched at processing facility, drive to location pre mixed based on specifications

volumetric truck: rolling facility, made to spec on site (but only for small batches)

Question 10

How long is the BATCH TIME for CONCRETE

Answer 10

2hrs