Concrete Finishing + Placing Flashcards Preview

BD_Ballast > Concrete Finishing + Placing > Flashcards

Flashcards in Concrete Finishing + Placing Deck (25)
1

long, cylindrical steel chute for placing underwater

tremise

2

to avoid excess segregation while placing @ formwork

avoid dropping long distances (5ft typ max),
avoid excess lateral movement.

3

wet material flows in all forms and around all rebar,
prevents honeycombing (airpockets)

Compact

4

As-cast Finishes:
pattern of form (typ for concrete unseen)

rough form finish

5

As-cast Finishes:
joist/tie holes planned so symmetrical.
fins left from concrete seeping into joints removed.

smooth form finish

6

Architectural Finishes:
plastic/wood/metal. parallel rib is common type.

form liner

7

Architectural Finishes:
surface wetted + scrubbed w wire/fiber brush
remove some surface mortar, expose coarse aggregate.

scrubbed

8

Architectural Finishes:
surface wetted w muriatic acid
expose coarse aggregate

acid wash

9

Architectural Finishes:
high-pressure jet mixed w air
remove some surface mortar, expose coarse aggregate.

water jet

10

Tooled and Sandblasted Finishes:
rugged, heavy texture.
remove portion of surface made w form liners
texture depends on form liners used

bush hammering

11

Tooled and Sandblasted Finishes:
finishing technique smoothes out surface of the concrete
similar to terrazzo in appearance

grinding

12

Tooled and Sandblasted Finishes:
application of other matl’s ex. stucco

applied

13

Tooled and Sandblasted Finishes:
remove surface, expose fine/coarse aggregate to varying degrees

sandblasted finishes

14

Rubbed Finishes:
surface wetted and rubbed w carborundum brick
smooth, uniform color and texture

smooth

15

Rubbed Finishes:
grout applied over and smoothed out.
uniform surface w defects concealed.

grout cleaned

16

Concrete Slab Finish Process (after pour):
metal/wood straightedge across form to roughly level

Strike Off

17

Concrete Slab Finish Process (after pour):
if smooth surface is req’d.
brings cement to surface,
consolidates and smooths.

Float

18

Concrete Slab Finish Process (after pour):
performed w hand-held wood/magnesium tool

Float

19

Concrete Slab Finish Process (after pour):
bullfloat

wider w long handle, for large surfaces while standing away

20

Concrete Slab Finish:
if no further work done,
sandpaper-like texture,
exterior finishes. (no surface finish product)

Float Finish

21

Float Finish: wood vs. magnesium float affect

wood float = rougher,
magnesium = smoother

22

Concrete Slab Finish:
used hours after floating.
further consolidates concrete.
hand/large mechanically driven rotary

Light steel troweled finish

23

Concrete Slab Finish:
used hours after floating.
further consolidates concrete.
greatly densifies top ⅛”, very smooth surface

Hard steel troweled finish

24

Concrete Slab Finish:
dislodges fine aggregate, for rough texture.
slip resistance outdoors.

Broom finish

25

Concrete Slab Finish:
hard steel trowel.
typ. industrial warehouses,
automated forklifts+highrack storage

Superflat floor finish