Question 1

Type ____ mortar is a medium-strength mortar with a compressive strength of 750 psi.
A) M
B) N
C) O
D) S

Accepted Answer

Type N mortar is known for its medium-strength properties, typically having a compressive strength of about 750 psi, making it suitable for general use in above-grade exterior and interior load-bearing installations.

Question 2

Describe type O mortar.

Accepted Answer

​ Type O mortar is a medium-strength mortar with a compressive strength of 350 psi (2.5 MPa). It is used for general interior purposes, such as for non-load-bearing walls where the compressive strength required does not exceed 100 lb. per sq. in. It must not be used in contact with soil or exposed to freezing conditions.

Question 3

Mortars have low ____.
A) workability
B) bond strength
C) volume change
D) hardening rates

Accepted Answer

Mortars are designed to have low volume change to minimize cracking and ensure stability in the structures they are used in.

Question 4

Type ____ mortar is a high-strength mortar with a compressive strength of 2,500 psi.
A) M
B) N
C) O
D) S

Accepted Answer

Type M mortar is known for its high strength, with a minimum compressive strength of 2,500 psi, making it suitable for use in applications that require significant structural support.

Question 5

What are the four major factors affecting the bond strength of mortar?

Accepted Answer

The answer of What are the four major factors affecting...

Question 6

The ____ of mortar depends mainly on the type and quantity of cementitious material used in the mortar.
A) workability
B) appearance
C) bond strength
D) compressive strength

Accepted Answer

The compressive strength of mortar depends mainly on the type and quantity of cementitious material used in the mortar.

Question 7

Describe the term workability in terms of dealing with mortar characteristics.

Accepted Answer

The answer of Describe the term workability in terms of...

Question 8

Mortar, in addition to bonding units together, must also do what three things?

Accepted Answer

The answer of Mortar, in addition to bonding units together,...

Question 9

The temperature of the mortar should never exceed ____ degrees Fahrenheit.
A) 120
B) 130
C) 140
D) 150

Accepted Answer

The temperature of the mortar should never exceed 120 degrees Fahrenheit to ensure proper curing and to avoid rapid drying, which can lead to weakened mortar strength and bonding issues.

Question 10

Describe how colored mortar is made.

Accepted Answer

The answer of Describe how colored mortar is made....

Quiz 10: Mortars for Masonry Walls

Type ____ mortar is a medium-strength mortar with a compressive strength of 750 psi.

Describe type O mortar.

Mortars have low ____.

Type ____ mortar is a high-strength mortar with a compressive strength of 2,500 psi.

What are the four major factors affecting the bond strength of mortar?

The ____ of mortar depends mainly on the type and quantity of cementitious material used in the mortar.

Describe the term workability in terms of dealing with mortar characteristics.

Mortar, in addition to bonding units together, must also do what three things?

The temperature of the mortar should never exceed ____ degrees Fahrenheit.

Describe how colored mortar is made.