Chapter 8 masonry review

Type O mortar is typically used for:

• Load-bearing walls

• Non-load-bearing walls

• Foundation work

• Exterior walls

Type O is a ______-strength mortar type.

• low

• medium

• high

• very high

Admixtures are added to masonry cements for:

• Improving workability

• Increasing strength

• Reducing cost

• Enhancing color

Accelerators are ingredients that increase a masonry cement’s rate of ______.

• hydration

• evaporation

• solidification

• dissolution

What is the purpose of retarders in mortar?

• To accelerate the setting time

• To slow down the setting time

• To increase the strength

• To improve the color

Pigments are insoluble powders added to masonry cements to obtain a desired ______.

• mortar color

• texture

• strength

• adhesion

What do plasticizers do to mortar?

• Increase its strength

• Make it more flexible

• Reduce its setting time

• Enhance its color

Retempering and tempering is adding water to mortar mixture when it loses water due to ______.

• hydration

• evaporation

• absorption

• leakage

Cold weather construction happens any time air or material temperatures drop under ______ degrees Fahrenheit.

• 40

• 50

• 60

• 70

What is workability in the context of mortar?

• The ability of mortar to be mixed and placed with minimal effort

• The strength of mortar after it has set

• The color of mortar when it is dry

• The cost of mortar per cubic meter