G1

Question 1

How much should good concrete slump?

Answer 1

3-4”

Question 2

How many times should a slump be rodded?

Answer 2

25 times

Question 3

What size is a slump cone?

Answer 3

100X200X300

Question 4

What happens when segregation occurs?

Answer 4

When larger aggregates settle to the bottom of the mix

Question 5

What does a slump test do?

Answer 5

Tests the consistency and workability of concrete

Question 6

Aggregates should be shaped?

Answer 6

Round or cubically

Question 7

Plastic cement is often used for making what?

Answer 7

Mortar, plaster, stucco

Question 8

GU Concrete is what and number?

Answer 8

General use #10

Question 9

MS Concrete is what and number?

Answer 9

Moderate Sulphate Resistant #20

Question 10

MH Concrete is what and number?

Answer 10

Moderate Heat of Hydration #20

Question 11

HE Concrete is what and number?

Answer 11

High Early Strength #30

Question 12

LH Concrete is what and number?

Answer 12

How Heat of Hydration #40

Question 13

HS Concrete is what and number?

Answer 13

High Sulphate Resistant #50

Question 14

What is Air Entrainment?

Answer 14

Microscopic Air Bubbles

Question 15

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

Answer 15

Type N, Type S, Type M

Question 16

Good Aggregates should be?

Answer 16

Strong, Hard, Clean, Durable

Question 17

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

Answer 17

Clinkers, HVMA (High Volume Mineral Additive)

Question 18

What percent of concrete is aggregates?

Answer 18

60-80%

Question 19

Fine aggregates are how big?

Answer 19

less then 5mm

Question 20

An accelerator is an example of a/an?

Answer 20

admixture

Question 21

How do you find the water to cement ratio?

Answer 21

Water divided by the cement = ratio

Question 22

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

Answer 22

3 Layers

Question 23

Name 4 qualities of properly portioned concrete mixes

Answer 23

Workability, Strength, Durability, Freeze/thaw Resistant

Question 24

the water-cement ratio for strong concrete should be?

Answer 24

Low

Question 25

Size of aggregates should be what thickness of the member?

Answer 25

1/5th

Question 26

Concrete being pumped should have _ added?

Answer 26

Superplasticizer

Question 27

the most common Pozzolans or Pozzolanic admixture is?

Answer 27

Fly Ash

Question 28

Fly Ash is used too what?

Answer 28

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

Question 29

Pervious Concrete is what?

Answer 29

Porus and allows water to flow threw it

Question 30

Cement applied with compressed air is called?

Answer 30

Shotcrete

Question 31

When is Gypsum used?

Answer 31

For self levelling concrete

Question 32

Silica Fume is used too what?

Answer 32

replaces cement but used when high strength concrete is required

Question 33

Blast furnace slag is used too what?

Answer 33

replace cement but improve the service life of the concrete

Question 34

what are protective coatings and what are they used for?

Answer 34

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

Question 35

What is prestressed concrete?

Answer 35

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

Question 36

Rebar should be overlapped how much?

Answer 36

24 times the diameter of the bar

Question 37

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

Answer 37

New built steel, axle steel, rail steel

Question 38

what should the max size of aggregates be?

Answer 38

1/5th size of steel members

Question 39

what should not be used when applying protective coatings?

Answer 39

form oil and curing compounds