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Safety
Admixtures
Basic Concrete
QC
Truck Knowledge
100

Name three items of PPE you should be wearing when exiting the truck.

Hard Hat  Gloves

Vest Safety Boots

Safety Glasses

100
What is concrete?
Concrete is a mixture of stone aggregates, sand, Portland cement and water that hardens as it dries
100

How do you measure the viscosity of concrete?

Slump/Spread test

100
What is the tool that looks like a wooden 2x4 board called?
A screed
200

Who is responsible for your safety at work?

Everybody plays a role in safety at work.

200

Air Entrainment admix is used for what purpose?

Freeze Thaw Cycles

Pumpability

200
What are five (5) reasons you might want to use concrete?
-fireproof -insect and rodent proof -decay resistant -highly storm resistant -wear resistant -water proof -strong -attractive -easy to use with little expense -availability -low maintenance -sanitary -easily recycled
200
In our project, we add peat moss, but for most large concrete projects you don't. Why do we add peat moss?
Weight
300

What is the most common RMC workplace injury/incident?

Slips, Trips, and Falls

300

What is the function of Chemical admixture retarders?

Slows the hydration process down

300

What is a "control joint?"

A control joint is a planned break which permits concrete to expand and contract without cracking.

400

Name 3 of the 5 key rules in the Smith System

1. Aim High in Steering 2. Get the big picture

3. Keep Your Eyes Moving 4. Leave Yourself and Out

5. Make Sure They See You

400
What is the difference between cement and concrete?
Cement is the glue Concrete is the cake
400

What is the process by which the water reacts with the cement, holding the other components together, eventually creating a stone-like mixture?

Hydration

400
What three things can you add to concrete to strengthen it?
Fiberglass, rebar or wire mesh
400
How long does it take for concrete to cure completely?
28 days
500

What does SCC stand for in relation to concrete?

Self Consolidating Concrete

500

Why do you need to be careful when adding water to concrete?

If you have too much or too little water, the concrete will crack