SOC Masonry Flashcards
1
Q
- How should you take care of your tool while doing masonry work?
A
Wet tools before use
Rinse all tools with water frequently
Do not immerse dirty tools in water. The cement will cure underwater
2
Q
- What are the dimension (nominal and actual) of a CMU/Cinder block?
A
Nominal 8 x 8 x 16 inches
Actual 7 5/8 x 7 5/8 x 15 5/8 inches
• 3/8 inch for mortar joint
3
Q
- What are the size of a masonry joints?
A
3/8
4
Q
- What is the weight range of a CMU block?
A
35-45 LBS
5
Q
- What is the weight range of a cinder block?
A
25-35 LBS
6
Q
- What is the difference between a cinder block and a CMU block?
A
CMU blocks are used for load bearingwall while cinder block are used for non-bearing wall
7
Q
- What are the two concrete block used in class?
A
Stretcher and corner
8
Q
- What are the different factors affecting bond strength to take into account in the choice of a mortar?
A
TYPE (M,S,N, AND O), Quality, Workability, and water retention
9
Q
- What are the desirable properties of a mortar?
A
Plasticity
Water retention
Strength
Durability
10
Q
- Mortar is produced in what?
A
Masonry
Portland
* when Portland cement is used, masonry lime must use
11
Q
- What are the different types of mortar?
A
M Below grade; contact with Earth S High resistance to lateral forces O used for load-bearing N Above grade; high or lateral strength not required
12
Q
- What are the two types of mixing?
A
Machine mixing
Hand mixing
13
Q
- What is the mixing time for a machine?
A
3 min
14
Q
- How do we want the sand to be?
A
Damp and loose
15
Q
- What are the two categories of sand?
A
Manufactured and Natural