Limestone And Shale Are

Front 1

Limestone and Shale are

a) igneous rocks

b) sedimentary rocks

c) metamorphic rocks

Back 1

b) sedimentary rocks

Front 2

The UNR campus has examples of the use of aggregates as individual and composite materials

a) True

b) False

Back 2

a) True

Front 3

Gravel is smooth and rounded while crushed stone tends to be sharp and angular

a) true

b) false

Back 3

a) true

Front 4

It is physically impossible for the bulk dry specific gravity of an aggregate to be larger than the apparent specific gravity of the same aggregate

a) true

b) false

Back 4

a)True

Front 5

Soundness indicates the resistance to aggregates toward freezing and thawing

a) true

b) false

Back 5

a) true

Front 6

a) Alkali-silica reactivity (PCC)

b) Durability cracking

c) popouts

d) Alkali silica reactivity (hot mix asphalt)

Back 6

a) Alkali-silica reactivity (PCC)

Front 7

Front (Term)

Back 7

1/2”

Front 8

Fine aggregate angularity is an indirect measure of aggregate particle shape and surface texture

a) true

b) false

Back 8

a) true

Front 9

For Portland cement concrete mixtures rounded smooth aggregates are normally preferred, while for asphalt mixtures tough and angular aggregate are normally preferred

a) true

b) false

Back 9

a) true

Front 10

SSD means

Back 10

Saturated surface dry meaning dry surface with water inside permeable voids

Front 11

The type of cement that stiffens when mixed with water and is used for most infrastructure construction applications is

a) Hydraulic Cement

b) Non-hydraulic Cement

Back 11

a) Hydraulic Cement

Front 12

The finer portland cement is ground, the

a) more it costs

b) the more it costs, the faster the hydration, and the faster the strength gain

c) faster the hydration reaction

Back 12

b) more it costs, the faster the hydration reaction, and the faster the strength gain

Front 13

The following materials can be made with cement

a) Mortar, Grout, and Concrete

b) Paste, Mortar, Grout, and Concrete

c) concrete

Back 13

b) Paste, Mortar, Grout, and Concrete

Front 14

If unknown the specific gravity of Portland cement can be assumed to be

a) 3.15

b) 3.05

c) 3.10

d) 3.51

Back 14

a) 3.15

Front 15

The raw material used to make Portland cement are

a) alumina and silica from clay or shale & calcareous materials

b) Gravel, sand, water, and Portland cement

Back 15

a) alumina and silica from clay or shale & calcareous materials

Front 16

Gypsum is added in the cement to

a) Increase cement strength

b) Regulate the set time

Back 16

b) Regulate the set time

Front 17

Which of these setting issues can NOT be fixed

a) false set and quick set

b) Flash set and quick set

c) False set

Back 17

b) flash set and quick set

Front 18

The minimum W/C ratio that should be used in the lab for evaluating Portland cement is determined from the Vicat consistency test

a) true

b) false

Back 18

a) true

Front 19

How is each type of cement used

Back 19

1) Residential driveway in an arid climate

2) Piles for a pier on the ocean

3) Concrete pavement slab replacement

4) mass concrete structure

5) Reinforced concrete pipe

Front 20

Proper curing of Portland cement concrete (adequate moisture temperature and time) is important to improve strength and durability of PCC

A) true

B) false

Back 20

a) True

Front 21

The structural designer provides the material engineer (PCC mix design) with a minimum required compressive strength required (f’cr) to account for variability in materials, production and testing

a) true

b) false

Back 21

a) true

Front 22

Select the match of test types used for fresh and hardened properties of PCC

fresh properties is to_______

Hardened Properties is to_______

Back 22

Fresh properties-> slump, air content, and yield

Hardened properties-> compressive strength and flexural strength

Front 23

a) true

b) false

Back 23

a) true

Front 24

Alkali silica reactivity is a reaction between alkali from cement with silica from sand, in the presence of moisture, that forms an expansive gel and leads to cracking of PCC

a) true

b) false

Back 24

a) true

Front 25

The higher the fineness modulus, the coarser the aggregate

a) true

b) false

Back 25

a) true

Front 26

The reason for vibrating PCC is to cause it to better flow around obstructions and remove excess of

a) entrapped air

b) entrained air

Back 26

a) entrapped air

Front 27

a) true

b) false

Back 27

b) false

Front 28

The PCC mix design correction for moisture corresponds to:

a) correcting the aggregate weights from dry to wet

b) correcting the aggregate weight from dry to SSD

c) correcting the aggregate weights from dry to wet and to account for only free water (excess of SSD) contributing to hydration.

d) Correcting the aggregate weights from dry to wet and account that only SSD water contributes in hydration

Back 28

c) correcting the aggregate weights from dry to wet and to account for only free water (excess of SSD) contributing to hydration.

Front 29

Viscoelastic means

Back 29

substances with dual properties having a fluid's viscosity and elasticity of a gel or a solid

Front 30

Examples of viscoelastic materials

Back 30

Glass and HMA

Front 31

Unit weight is

Back 31

Weight/volume

Front 32

ASTM stand for

Back 32

American Society for Testing Materials

Front 33

What does AASHTO stand for?

Back 33

American Association of State Highway and Transportation Officials

Front 34

Nominal maximum size (ASTM)

Back 34

The largest sieve that retains some of the aggregate particles, but not more than 10%

Front 35

Nominal maximum size (Superpave)

Back 35

One sieve larger than the first sieve to retain more than 10%

Front 36

What does ASR stand for?

Back 36

Alkali Silica Reactivity

Front 37

What does ASR stand for?

Back 37

Alkali Silica Reactivity

Front 38

What are 3 things that need to react together for ASR to occur?

Back 38

1) Silica from the sand

2) Alkali from the cement

3) water-> from environment

Front 39

What can you add to a mix design to increase workability?

Back 39

Additives

Front 40

All aggregate retained on #4 sieve are coarse aggregate

True or false?

Back 40

True

Front 41

What additive is added into concrete to reduce setting in hot weather?

Back 41

Retardant

Front 42

Is angular or round aggregate desired in PCC for workability?

Back 42

Round

Front 43

Why is angular aggregate desired for asphalt?

Back 43

Binder is weak and so angular aggregation helps with stability as they lock in place better due to angularity

Front 44

What 4 things does PCC consist of?

Back 44

1)Water

2)Cement

3)Fine aggregate (sand)

4)gravel aggregate

5) maybe addmixtures

Front 45

What would a curve look like for the workability of Portland cement vs time?

Back 45

Back (Definition)

Front 46

What would the trend line look like when comparing strength of PCC vs time?

Back 46

Back (Definition)

Front 47

What 2 things make of paste?

Back 47

Cement and water

Front 48

What 2 things make of paste?

Back 48

Cement and water

Front 49

What 3 things make up mortar?

Back 49

Cement

Sand

Water

Front 50

What does the addition of gypsum do?

Back 50

Gypsum prevents flash setting

Front 51

What is the specific gravity of PCC if not given?

Back 51

3.15

Front 52

How many lbs are in a sack of cement?

Back 52

94lbs

Front 53

What would a plot look like for PCC fineness vs strength

Back 53

Back (Definition)

Front 54

Trend line for PCC strength vs water

Back 54

Back (Definition)

Front 55

Why are fine aggregates better?

Back 55

Bleed less and offer better workability but cost more

Front 56

PCC penetration vs water trend line

Back 56

Back (Definition)

Front 57

What is the trend line for penetration at fixed W/C vs time?

Back 57

Back (Definition)

Front 58

Trend for Financial risk vs time

Back 58

Back (Definition)

Front 59

How many types of Portland cements are there?

Back 59

5 types of cements

Front 60

What is type 1 cement used for?

Back 60

Used for everyday non critical uses like driveways

Front 61

What is type 2 cement used for?

Back 61

Used in moderate sulfate exposure like on piers or retaining walls

Front 62

What is type 2 cement used for?

Back 62

Used in moderate sulfate exposure like on piers or retaining walls

Front 63

What is type 3 cement used for?

Back 63

Fast track construction for things like PCC pavement replacement

Front 64

What is type 2 cement used for?

Back 64

Used in moderate sulfate exposure like on piers or retaining walls

Front 65

What is type 3 cement used for?

Back 65

Fast track construction for things like PCC pavement replacement

Front 66

What is type 4 cement used for?

Back 66

Used for massive structures such as in spillways or dams

Front 67

What is type 2 cement used for?

Back 67

Used in moderate sulfate exposure like on piers or retaining walls

Front 68

What is type 3 cement used for?

Back 68

Fast track construction for things like PCC pavement replacement

Front 69

What is type 4 cement used for?

Back 69

Used for massive structures such as in spillways or dams

Front 70

What is type 5 cement used for?

Back 70

Used when it will be exposed to corrosive elements. Mainly used for pipe

Front 71

What are air entertainers and their importance?

Back 71

Well distributed air bubbles throughout portland cement.

Helps for better resistance to freeze &thaw

Front 72

Fatigue happens with

Back 72

Repeated loads which cause failure over time

Front 73

Fatigue happens with

Back 73

Repeated loads which cause failure over time. Problem in pavement and bridges

Front 74

What is Creep?

Back 74

Increase in strain under stress over time (static loads) problems in buildings when they settle

Front 75

Trends for Crushed aggregate vs stability

Back 75

Back (Definition)

Front 76

Stress vs strain trend line for PCC

Back 76

Back (Definition)

Front 77

What is plastic shrinkage?

Back 77

Evaporation happens too quickly. Could be caused by windy conditions

Front 78

Wet weight is

Back 78

Back (Definition)

Front 79

Temperature vs slump trend line

Back 79

Back (Definition)

Front 80

True or false

As the W/C ratio increases , the f’c ( average compressive strength) decreases

Back 80

True

Front 81

True or false

As the W/C ratio increases , the f’c ( average compressive strength) decreases

Back 81

True

Front 82

True or false

The curing time has no effect on concrete strength

Back 82

False

Front 83

True or false

The higher the w/c ratio the lower the workability

Back 83

False

Front 84

True or false

The higher the w/c ratio the lower the workability

Back 84

False

Front 85

True or False

To increase the workability there is one thing we can do, increase the water content

Back 85

False. That will reduce strength instead use an additive

Front 86

True or False

The unit weight of cement is 2.15

Back 86

False

Front 87

True or false

The aggregate typical specific gravity is 1.0

Back 87

False. It ranges from 2.5-3

Front 88

True or false

Coarse aggregate: All the aggregates pass a #4 sieve

Back 88

False. All aggregates retained on #4 sieve are coarse aggregate

Front 89

True or false

Type 3 cement is late early strength concrete

Back 89

False. It is used fast track construction for things like concrete slab replacement

Front 90

True or false

Air entrainment will retard the settlement time of concrete

Back 90

False. Only retarders can do that. Air entrainment minimizes entrapped air.