Deck 10: Mortars for Masonry Walls

Question 1

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

A) M
B) N
C) O
D) S

Answer 1

B

Question 2

Describe type O mortar.

Answer 2

​ 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

Answer 3

C

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

Question 5

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

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

Question 7

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

Question 8

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

Question 9

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

A) 120
B) 130
C) 140
D) 150

Question 10

Describe how colored mortar is made.