Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Building construction > chapter 10 > Flashcards

chapter 10 Flashcards

concrete construction

1
Q

like masonry concrete doe not ?

A

burn

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

concrete also resist “” and the effects of contact w/ ‘’

A

insects/ soil

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

concrete is the hardened form of ‘’ produced form ‘’ coarse and fine ‘’ and ‘’.

A

cement, porland cement, aggregates and water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

course aggregates include ‘’
fine aggregates include ‘’

A

gravel/stone
sand

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

what make up a large volume of cement

A

aggregates p. 257

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

types of admixtures are

A

shale or clinker - reduce density of concrete
super-plasticizers
coloring

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

any adhesives material or variety of materials which can be made into paste w/ adhesives and cohesive ro bond inert aggregate materials into solid mass chemical hardening

A

cement

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

particulates materials used to provide a stable blend bedding or reinforce a composition material.

A

aggregates

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

ingredients or chemicals added to concrete mix to produce to make concrete w/ specific characteristics

A

admixtures

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

admixtures used w/ concrete or mortar mix to make it workable , pliable and soft while using relatively little water

A

super-plasticizers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

types of concrete include

A

ordinary stone concrete
structural lightweight
insulating lightweight
gypsum
high early strength
expansive
water-permeable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

concrete walls and slabs act as good

A

fire barriers

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

concrete is widely used for what kind of construction

A

type 1 fire resistant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

primary advantage of concrete

A

produced fro locally available and low cost raw material

noncombustible

performs well under mild to moderate fire conditions

good insulating properties p. 258

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

like masonry, concrete is strong in ‘’ but weaker in ‘’

A

compression /tension

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

untimate compressive strength can range from

A

2500-6000

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

what includes comments added to the concrete before it hardens to sista tensile force.

A

reinforced concrete

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

reinforcing components can include s

A

rebar, wire mesh or fiberglass additives p259

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

rebar size are commonly referred to by a standardized ‘’, what is the most common size

A

number , 5 .625 inch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

concrete beams are frequently cast in the shape of

A

T

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

what is put at the bottom of a concrete beam to reduce tensile force

A

reienforced steel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

vertical reinforcing bars are known as ‘’, they provided to resist the diagonal tension and resist bending forces in the column from such sources as wind and settling

A

stirrups.260

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

when a concrete beam or floor slab supports a load, the concrete in the part of the beam in tension is doin what

A

no work

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

tensioning reinforced bar before concrete is pour is

A

prestressing

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

2 common methods of prestressing concrete are

A

pretensioning and postensioning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

what should not be cut during FF opts unless necessary to rescue trapped victims

A

reinforced steel

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

what is like to happen if post tension reinforced steel is cut in concrete

A

to spring out of concrete, they are like big rubber bands p. 261

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
28
Q

uses steel strands ( cables stretched b’tw anchors producing tensile force in the steel

A

pretensioning

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
29
Q

uses reinforcing steel cables that are not tensioned until after the concrete has hardened to certain strength

A

posttensioning p. 262

30
Q

what type of concrete system may be more vulnerable to failure that ordinary reinforced concrete

A

prestressed concrete

31
Q

systems use reinforcing cables and rods made of high strength steel that can yield as temps as low as

A

752

32
Q

prestressed concrete will fail sooner than

A

conventional reinforced assembly

33
Q

what is placed in forms and cured away at a plant away from a job

A

precast concrete

34
Q

what is placed in forms at the buildings site as a wet mass and hardens in prepared forms

A

cast in place concrete

35
Q

most ‘’ is proportioned at bulk plants and then mixed in a mixing truck enroute to the job site

A

cast in place

36
Q

common application for concrete include

A

pavement , foundations , columns, floors , walls , concrete masonry units

37
Q

during the curing process concrete will what

A

shrink slightly

38
Q

normal design strength is reach how what day

A

28

39
Q

single most important factor in determining the intimate strength of concrete is the ‘’ ratio

A

water to cement

40
Q

if to much what is added to the mix what happens

A

concrete doesn’t reach desired strength

41
Q

hardening of concrete involves the chemical process known as ‘’. in which water combines w/ particles of cement to form a microscopic gel

A

hydration

42
Q

during hardening of concrete , heat is given off by chemical process

A

heat of hydration

43
Q

in the process of curing the correct temp is required which is ideal between

A

50 and 70 “

44
Q

concrete above 100 will not what

A

reach its proper strength

45
Q

concrete cured at freezing temps will

A

harden more slowly p. 264

46
Q

method of evaluating the moisture content of wet concrete by measuring the amount that a small cone shaped sample of the concrete stumps after it is removed from a standard sized test

A

slump test

47
Q

concrete with high moisture content has ‘’ than dryer concrete

A

greater slump

48
Q

uses small test cylinders of a concrete batch to determine the compression strength of that batch

A

compression testing * most costly p. 265

49
Q

fire resistance of concrete assembly is affected by such variables as

A

density
thickness
quality
load
depth over the reinforcing bars

50
Q

what concrete has a lower density than ordinary concrete and had a lower thermal conductivity which acts as a better insulator against heat

A

lightweight concrete

51
Q

fire resistance of concrete assemblies are sometimes compromised in ways including

A

non resistive members supporting concrete floor slabs or wall panels

precast walls panels horizontally braced with exposed steel roof beams

opening in concrete slabs / walls w’o rated assembly protecting the opening

force of an explosion p. 266

52
Q

expansion of moisture w/in concrete when heated or frozen is ( weakens concrete and exposed steel to fire )

A

spalling

53
Q

concrete tends to retain heat of an exposing fire and release it slowly, in an effect called

A

heat sink effect

54
Q

a simple system that consist of a concrete slab w/ concrete columns for support ( 6-12 inch ) ( good for building supporting hvy loads

A

flat slab concrete frame

55
Q

building supporting light loads don’t need as much reinforcing so they use a system called

A

flat plate p. 267

56
Q

what type of beam frame consist of concrete slabs supported by concrete beams

A

slab and beam ( light floor loads) 2 inch thick

57
Q

what are highly susceptible to fire damage because of slab thickness

A

slab and beam

58
Q

when concrete beams run one way its know as

A

one way reinforced slab

59
Q

slab and beam concrete framing featuring concrete beams running 2 ways is know as

A

2 way slab construction * looks like waffle )

60
Q

when is slab and beam concrete framing used

A

when spans are short and floors are high

61
Q

precast structural shapes included

A

slabs , wall panels and columns p. 268

62
Q

advantages to using precast concrete

A

higher degree of quality possible than cast in place

work can be proceed faster

polystyrene core improves insulating

63
Q

major disadvantage

A

transporting it and cost for it p. 269

64
Q

precast floor systems can be cast in standard shapes including

A

solid slabs, hollow core
single try and double tee slabs

65
Q

common form of construction used w/ precast concrete, reinforced wall panels are cast at the job site in horizontals casting beds, after cured a crane tilts the wall panels up

A

tilt up construction

66
Q

a variety of techs such as ‘’’ can be used to connect precast structural components to each other

A

bolts, welds, and posttensioning p270

67
Q

precast concrete is commonly used in construction of

A

parking garages,

68
Q

choices of material used in curtain wall may be influenced by style, thermal properties and cost material may include

A

alumna , glass, steel and masonry. 271

69
Q

Examples of details that are difficult to determine after construction /?

A

ordinary reinforcing vs psotention
cast in place vs precast
stucco vs concrete

70
Q

supports for precast beams by include

A

corbels ( brackets ) short steel beams cast into poured colums p. 272

Building construction (12 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions