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Flashcards in Concrete Deck (26):
1

When and where do we use insulation in our slabs?

whenever slab is at or above frost level. where walkout conditions, area ways, low grade.

2

what is the required finished thickness of the concrete floor in the basement?

4"

3

what is a weather lip at a garage door?

1 1/2" drop down from the garage slab which prevents weather from entering the garage.

4

what is an expansion joint, and what is its purpose?

material in between side walk slabs that minimize expansion cracks. the purpose of the expansion joint is to allow concrete to expand without cracking.

5

how thick should the gravel base be under the concrete?

4"

6

what is a structural slab?

grade beams with slab in place

7

what is mean by facing concrete?

smoothing face of concrete

8

when should exterior concrete not be poured in the winter?

28 degrees and when ground is frozen

9

How thick should a sidewalk be?

4"

10

what is the maximum sloe per code that we should adhere to on driveways?

14%

11

 

 

Edger:

used to finish edges of sidewalk

12

 

 

 

Trowel

 

used to smooth concrete surfaces. has a long flat bottom

13

Jointer

 

used to cut control joints

14

Bull float

 

 

aluminum tool mounted on a series of poles and used to spread and smooth freshly placed concrete.

15

Power Trowel 

 

 

 

large flat blades used to shape and smooth concrete

16

 

 

 

Screed

 

used for striking off excess concrete from poured rough concrete surfaces

17

what size of base stone material should be used on an asphalt driveway?

21A or crush&run

18

what thickness should an asphalt driveway be?

3"

19

what is the purpose of compacting the drive before putting down the asphalt?

prevent settlement and cracking

20

what should the minimum slope be on a drive from the house to the curb to effectively move water?

2%

21

should all soft ground in a driveway be covered with sub-base material?

Yes

22

what is "curing compound"?

assisting concrete to harding point

23

what is a control joint?

grooves inserted into a concrete surface to "control" cracking.

24

what is it meant by "Air Entrained" concrete?

mixture used purposely to entrain micro-scopic air bubbles in concrete

25

what is the PSI of basement concrete?

3000 PSI

26

what is the PSI of exterior concrete?

3500 PSI