Concrete is strong in what? but weak in?

Concrete cast without reinforcement is called ?

Precast concrete is suited for structures where what is required

The chemical reaction between water and cement is called ?

What types of concrete would be used for pours in hot weather?

What type of walls are made up of tilt up concrete panels?

What are examples of prestressed concrete?

What is added to cement to regulate the setting time of concrete?

What size is fine aggregate ?

What size is coarse aggregate?

When concrete is exposed to moderate sulphate attack what type of cement is recommended?

When aggregates are well, graded and economical mix is achieved because less what is required ?

Air entrainment percentage, when concrete arrives to site is usually what? What do we need to bring it up to after it arrives?

Aggregates account for what percent of concrete volume ?

a low w/c will result in higher ___________ strengths?

The recommended maximum allowable placement time for concrete is ?

Compressive strength are measured by ?

To check for the presence of an organic material what test is done?

Air entrainment increases the ability of concrete to withstand ?

Normal density concrete weights ___lbs per cubic foot or ____kg per cubic meters

When grouting in post tensioning ducts, it is best to use what type of grout ?

Masonary concrete is considered ?

Cast in place refers to concrete ?

The recommended Max slump for a cast in place concrete walls and columns is ?

Cement (concrete) is made out of? (Lisag)

Concrete used for skate parks pools and boat hulls is called ?

Self levelling concrete is used to create a ?

The test used to test the slump or self consolidating concrete is called ?

Raking concrete with the tines down can cause?

Vibratory screeds will ?

bullfloats will bring paste to the surface, and ?

Bronze and magnesium tools will aid in?

Wood floats should only be used on?

Always place concrete (location)

Overworking concrete will bring ?

Floating should commence as soon as?

Hardeners are used for ?

A metallic Hardner is ?

Monolithic toppings are installed while ?

A creamy Portland cement sand mixture is an example of ?

Sandblasting of concrete surface should not exceed ?

Sandblasting should be done between

concrete curing begins?

moistening the subgrade prevents?

When curing with poly in the winter, what colour is preferable?

the reaction between concrete and carbon dioxide is called?

When heat curing, heat must be reduced by no more than ?

A Groover is used for?

If wet curing is not done ?

Improper curing can result in ? (strength loss)

Direct fired heater will cause ?

What compacts and densifies the concrete surface, making it smoother and stronger ?

It’s best to set wall pour Heights after ?

Stakes and slab forms are cut ?

Slope can be expressed as ?

Wet screeds are fast and efficient and use ?

If a strike off board won’t reach from edge to edge ?

concrete must be poured? (hours)

What type of mixer would be more suitable then transit mix for remote location ?

Concrete should always be placed ?

The maximum size of aggregate, when pumping ?

Concrete should always be cast against fresh concrete to minimize?

When casting stairs, or stepped footings begin concrete placement?

Concrete should not be allowed to fall freely more than ?

For underwater placement of concrete?

What does vibration of concrete do?

Excessive vibration can cause

when pouring a floor with heating ducts cast it is important to?

Factors affecting hydrostatic pressure for concrete are ? (4 factors)

at 20 degrees concrete will set up in?

Expansion joints would be installed at ?

The most important thing when pour watching is?

columns must be what? to prevent racking

vibrator penetration into the previous lift when pouring a wall is?