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Carpentry Level 2 > G1 > Flashcards

G1 Flashcards

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1
Q

How much should good concrete slump?

A

3-4”

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2
Q

How many times should a slump be rodded?

A

25 times

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3
Q

What size is a slump cone?

A

100X200X300

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4
Q

What happens when segregation occurs?

A

When larger aggregates settle to the bottom of the mix

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5
Q

What does a slump test do?

A

Tests the consistency and workability of concrete

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6
Q

Aggregates should be shaped?

A

Round or cubically

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7
Q

Plastic cement is often used for making what?

A

Mortar, plaster, stucco

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8
Q

GU Concrete is what and number?

A

General use #10

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9
Q

MS Concrete is what and number?

A

Moderate Sulphate Resistant #20

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10
Q

MH Concrete is what and number?

A

Moderate Heat of Hydration #20

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11
Q

HE Concrete is what and number?

A

High Early Strength #30

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12
Q

LH Concrete is what and number?

A

How Heat of Hydration #40

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13
Q

HS Concrete is what and number?

A

High Sulphate Resistant #50

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14
Q

What is Air Entrainment?

A

Microscopic Air Bubbles

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15
Q

What are the three types of Masonry cement from non load bearing too high load bearing?

A

Type N, Type S, Type M

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16
Q

Good Aggregates should be?

A

Strong, Hard, Clean, Durable

17
Q

Eco-Frendly Cement should have less _ and replaced with _ ?

A

Clinkers, HVMA (High Volume Mineral Additive)

18
Q

What percent of concrete is aggregates?

A

60-80%

19
Q

Fine aggregates are how big?

A

less then 5mm

20
Q

An accelerator is an example of a/an?

A

admixture

21
Q

How do you find the water to cement ratio?

A

Water divided by the cement = ratio

22
Q

The slump cone should be filled in how many layers then rodded when full?

A

3 Layers

23
Q

Name 4 qualities of properly portioned concrete mixes

A

Workability, Strength, Durability, Freeze/thaw Resistant

24
Q

the water-cement ratio for strong concrete should be?

A

Low

25
Q

Size of aggregates should be what thickness of the member?

A

1/5th

26
Q

Concrete being pumped should have _ added?

A

Superplasticizer

27
Q

the most common Pozzolans or Pozzolanic admixture is?

A

Fly Ash

28
Q

Fly Ash is used too what?

A

replace some of the cement to produce a more cost efficient concrete mixture

29
Q

Pervious Concrete is what?

A

Porus and allows water to flow threw it

30
Q

Cement applied with compressed air is called?

A

Shotcrete

31
Q

When is Gypsum used?

A

For self levelling concrete

32
Q

Silica Fume is used too what?

A

replaces cement but used when high strength concrete is required

33
Q

Blast furnace slag is used too what?

A

replace cement but improve the service life of the concrete

34
Q

what are protective coatings and what are they used for?

A

resins, pigments and solvents. protecting the surfaces of the concrete in harsh environments

35
Q

What is prestressed concrete?

A

Pre tensioned steel cables that have been set before concrete placement to increases tensile strength

36
Q

Rebar should be overlapped how much?

A

24 times the diameter of the bar

37
Q

what are the three types of steel used in pree stressing?

A

New built steel, axle steel, rail steel

38
Q

what should the max size of aggregates be?

A

1/5th size of steel members

39
Q

what should not be used when applying protective coatings?

A

form oil and curing compounds

Carpentry Level 2 (9 decks)

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