Masonry Flashcards

1
Q

How many ways are there to mix mortar and what are they

A

Portland cement, masonry cement

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2
Q

What are the ingredients of mortar

A

Portland cement, lime, sand, water

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3
Q

What is a different set of ingredients of mortar

A

Masonry cement, sand, water

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4
Q

How many types of mortar are there and what are they

A

M, S, N, O

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5
Q

How many ways can you physically mix mortar

A

Machine mixing, hand mixing

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6
Q

What is the minimum machine mixing time for mortar

A

3 minutes

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7
Q

How long do you allow dry ingredients to mix in mixer before adding water

A

One minute

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8
Q

What are the three types of sand

A

Manufactured, natural, stand

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9
Q

What are the desirable properties of mortar

A

Plasticity, water retention, strength and durability

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10
Q

What are the three kinds of levels

A

Plum, Level, Square

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11
Q

What does it mean to be “plum”

A

Vertical on two planes

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12
Q

What does it mean to be level

A

Horizontally straight

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13
Q

What does it mean to be square

A

90 degrees on all corners

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14
Q

True or False: A foundation must be Square AND Level AND Plum

A

True

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15
Q

True/False: A Cinder block may be load bearing

A

False

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16
Q

True/False: A Concrete block (or a Concrete Masonry Unit (CMU)) may be load bearing

A

True

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17
Q

What are the 5 parts of a wall

A
Corner/end
Field
Control/expansion joints
Wall intersections
Rough opening (doors/windows)
18
Q

What is the definition of masonry construction

A

To build a structure from any building materials that consist of units held together with mortar; concrete block, brick, stones, clay tile and sometimes even glass block .

19
Q

What factors effect the bond strength of mortar

A
Type and quality of mortar
M,S,N,O
• Workability or plasticity
• Water retentivity
• Surface texture of the mortar bed
• Quality of workmanship in laying the units.
20
Q

What are the two ways to mix mortar

A

Portland Cement

Masonry Cement

21
Q

Type M motar

A

Used for below-grade masonry that contacts earth (i.e. foundations, retaining walls, walkways)
1 part portland cement
1/4 part hydrated lime or lime putty 3 parts sand
OR
1 part portland cement
1 part Type II masonry cement 6 parts sand

22
Q

Type S Mortar

A

Used where high resistance to lateral forces are required.
1 part portland cement
1/2 part hydrated lime or lime putty 4 1/2 parts sand
OR
1/2 part portland cement
1 part hydrated lime or lime putty 4 1/2 parts sand

23
Q

Type N mortar

A

Used in above-grade and exposed masonry where high compressive and/or lateral strengths are not require.
1 part portland cement
1 part hydrated lime or lime putty 6 parts sand
OR
1 part Type II masonry cement
3 parts sand

24
Q

Type O

A

Used for load-bearing, solid-unit walls when the
compressive stresses do not
exceed 100 psi, and the subject to freezing and thawing in the
masonry is not
presence of a lot of water.
1 part portland cement
2 parts hydrated lime or lime putty 9 parts sand
OR
1 part Type I or Type II masonry cement 3 parts sand

25
Q

Calcium chloride cannot be more than what percent by weight of your mortar (when used as accelerant)

A

2%

26
Q

When should Calcium chloride not be used

A

For steel- reinforced masonry (i.e. reinforced concrete)

27
Q

What two mortar materials should be covered to prevent moisture loss

A

Sand and Lime

28
Q

How wide does the footing have to be

A

2x wall thickness

29
Q

How do you lay the first course

A
Locate the corners.
Lay mortar bed.
Lay blocks on corners first, then work
inward toward the middle.
Ensure all block is level and plumb.
Ensure all mortar joints are filled and tooled.
30
Q

Describe laying corners

A

Build up the corners 4 or 5 courses high.
Step each course back one-half block.
Mortar for horizontal joints is applied to the
top of the course previously laid.
Apply mortar for the vertical joints to either the block being laid or to the block previously laid.

31
Q

When do you tool the joints

A

Once the mortar becomes

“Thumbprint” hard.

32
Q

In what order do you strike the joint

A

Vertical first, then horizontal

33
Q

What are the two types of lintels

A
  • Precast from concrete.

* Constructed from lintel block,steel reinforcement bar, and concrete.

34
Q

Equation: Estimate number of masonry blocks

A

Linear Feet x Height x 1.125 = Total number block

35
Q

Equation: Estimate masonry cement in block build

A

Total Block / 100 x 3 = Bags of masonry cement

36
Q

Equation: Estimate sand in masonry build

A

1 Ton of sand per every 8 bags of masonry cement; Therefore, divide number of bags by 8

37
Q

Equation: Number of gallons of water per bag of masonry cement

A

Water = 8 gl per bag

38
Q

Equation: Number of bricks in masonry build

A

Linear Foot x Height x 6.75 = number of Bricks

39
Q

Equation: Estimate masonry cement in brick build

A

Total Bricks / 1000 x 8 = Masonry bags

40
Q

Equation: Estimate sand in masonry brick build

A

1 Ton of sand per 1,000 bricks; Therefore, divide number of bricks by 1,000

41
Q

What is the max length a wall can be without an expansion joint

A

25 feet