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SOC Batter Boards, Masonry and Concrete > Masonry > Flashcards

Masonry Flashcards

1
Q

formula for estimating masonry block

A

linear feet x height x 1.125 =Total # of blocks

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2
Q

formula estimating masonry cement…

A

(number of blocks ÷ 100) x 3 = bags of cement

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3
Q

formula estimating for masonry sand

A

1 ton of sand per 8 bags of masonry cement
-or-
bags of cement ÷ 8 = tons of sand

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4
Q

formula estimating for water

A

8 gallons of water per bag of cement
-or-
bags of cement x8 =gallons of water

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5
Q

how many CMU blocks come on a pallet?

A

94

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6
Q

formula for concrete Project Volume

A

PV= L ×W ×H × #of pads

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7
Q

formula calculating concrete Loss Factor

A

LF = PV x 1.1 (if under 5400 cubic ft/200cu yd)

LF = PV x1.05 (if over 5400cu ft/200cu yd

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8
Q

formula calculating concrete Loss Volume?

A

LV= LF x1.5

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9
Q

what are the most common types of mortar mixes?

A

N M S O

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10
Q

formula calculating cement, sand, and gravel for concrete

A

1/6 x LV =bags of cement
2/6 x LV = cubic feet of sand
3/6 x LV = cubic feet of gravel

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11
Q

How much concrete can delivery trucks hold?

A

10 cubic yards

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12
Q

formula converting cubic feet into cubic yards

A

(length x width x height) ÷ 27 = cubic yards

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13
Q

how much time do you have to pour concrete, once water is mixed in?

A

3 hours

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14
Q

What are the benefits of a lower psi mortar?

A

better adhesive and sealing powers

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15
Q

What is the most common cement used by the military?

A

Portland Cement

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16
Q

what type of mortar is general purpose?

A

Type N

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17
Q

What is Type N mortar used for?

A

above grade work, interior and exterior load bearing

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18
Q

What type of mortar has the highest compressive strength and is used for below grade load bearing?

A

Type M

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19
Q

What is Type S mortar used for?

A

below grade, sewers, brick patio/driveway

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20
Q

What type of mortar is used for above grade, non-load bearing situations?

A

Type O

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21
Q

What type of mortar is used for historic preservation?

A

Type K

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22
Q

Formula for Volume of a cylinder

A

V= pi x Radius squared x height

23
Q

When hand mixing what order should you mix?

A

dry goods mixed, then add water

24
Q

What components go into concrete?

A

Portland cement, water, aggregates

25
Q

what affect does water have in mixing concrete?

A

less water makes a stronger mix

26
Q

Concrete should be mixed with 60-80% of what?

A

Aggregates

27
Q

What is used primarily to gain economy, in concrete mixtures?

A

Aggregates

28
Q

what are the types of Aggregates in a concrete mix?

A

Course- gravel, rock

Fine- sand

29
Q

What are the types of Portland Cement?

A 
Type 1 Normal, 
Type 2 modified, 
Type 3 high early,
Type 4 low heat 
Type 5 sulfate resistant
30
Q

what types of Portland Cement are “air entrained”?

A

Types 1,2,3

31
Q

What are the types of concrete?

A

Reinforced, pre-stressed, Precast, lightweight

32
Q

Which type of concrete is easier to ship and fire resistant?

A

lightweight

33
Q

Describe pre-stressed concrete

A

reinforced rebar or welded wires are stretched with tension before concrete is poured over it

34
Q

what type of concrete has steel rods running through it?

A

Reinforced

35
Q

What are the disadvantages of concrete?

A

Weak tinsel strength, expansion and contraction, shrinks while drying, weight

36
Q

what advantages does concrete have over other materials?

A

durability, castable, economical, compressive strength

37
Q

What type of joint controls cracking?

A

control joint

38
Q

where would an expansion joint be located? What would it consist of?

A

between two slabs of concrete, such as sidewalk and building, or driveway and sidewalk.

a resilient material, rubber, wood etc no more than 1/4in thick

39
Q

what must concrete forms be?

A

tight rigid strong

40
Q

what must be <4ft per hour, vertically?

A

rate of filling concrete

41
Q

When should you never pour concrete?

A

freezing Temps

42
Q

when should you use accelerators?

A

When pouring in Temps over 90 degrees

43
Q

when should you not use accelerators? why?

A

in reinforced concrete. they are oxidize and will weaken the metal

44
Q

What is it called when you add more water to concrete mix?

A

retempering

45
Q

what is Modular Construction?

A

when the dimensions of the construction are made around the size of block being used

46
Q

Name the parts of a wall

A

corner/end, field, expansion/control Joint, intersection

47
Q

what do you put in a block wall, every 4ft?

A

rebar reinforcement

48
Q

What are the 3 essential things the foundation must be?

A

plumb, level, square

49
Q

what does plumb mean?

A

perpendicular, straight up and down, on 2 axis’

50
Q

what does it mean to be even on a horizontal plane?

A

level

51
Q

what does square mean?

A

equal distances and angles

52
Q

what are some considerations of a job site?

A

drainage, slope, soil stability, tactical employment, commanders desire

53
Q

what size should footing be?

A

2x wall thickness

SOC Batter Boards, Masonry and Concrete (1 decks)

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