Deck 8: Cast-In-Place Concrete

Question 1

____ in concrete construction are used to install construction, contraction, and expansion joints as well as for creating the perimeter of any penetrations in a concrete wall.

A) Waterstops
B) Bleeds
C) Bull floats
D) Trowels

Answer 1

A

Question 2

Describe the conditions and considerations that should be met when placing concrete in hot weather.

Answer 2

In addition to maintaining low concrete temperature by cooling the aggregates and water, precautions must be taken to maintain a low temperature while placing concrete. This can involve shading and painting the mixers, chutes, hoppers, pump lines, and other concrete handling equipment white. Forms can be cooled with water, and the sub-grade can be moistened before the concrete is placed. Concrete must be transported from the mixing station to the point of placement as quickly as possible. In hot weather, the mix should be in place 45 to 60 minutes after mixing.

Question 3

Concrete placement occurs ____ the base for on-grade pours is ready or the forms for walls, columns, and beams are erected and reinforcing is in place.

A) after
B) before
C) at the same time as
D) a week after

Answer 3

A

Question 4

Concrete reaches its specified design strength after 28 days of ____.

A) foamwork
B) finishing
C) curing
D) placement

Question 5

Name the type of fiber reinforcements that are available and name the considerations that regulate which fiber should be used.

Question 6

____ are hot rolled steel rods that may be plain (smooth) or deformed.

A) Welded wire reinforcements
B) Fiber reinforcements
C) Insulated concrete forms
D) Reinforcing bars

Question 7

Describe two-way solid slab construction and the formation of the same.

Question 8

Describe the process of lift-slab construction.

Question 9

Name the various ways concrete can be moved and placed.

Question 10

____ construction utilizes a flat slab supported by thickening the slab at each column with a drop panel or a drop panel and a capital.

A) Two-way solid slab
B) Two-way flat slab
C) Two-way flat plate
D) Two-way joist (waffle) flat slab

Question 11

____ is a form of site-cast concrete.

A) Lift-slab construction
B) Tilt-up concrete construction
C) Tilt-down concrete construction
D) On-grade slab construction

Question 12

Describe the purpose of snap ties in relation to concrete form work.

Question 13

____ construction has the slab supported on two sides by beams or load-bearing walls.

A) One-way solid slab
B) One-way flat slab with beams and girders
C) One-way flat slab with joists and beams
D) Two-way flat slab

Question 14

Describe ICF forms and how they are used.

Question 15

The ____ system consists of a series of concrete joists cast at right angles to each other to form a grid.

A) two-way flat plate
B) two-way solid slab
C) two-way joist framing
D) one-way solid slab

Question 16

Describe how cast-in-place concrete is produced on site.

Question 17

Concrete is usually prepared in ____.

A) batches
B) mixes
C) ready-mixes
D) stations

Question 18

Describe one-way solid slab construction and the formation of the same.

Question 19

Describe continuous beam casting as it relates to cast-in-place concrete structural systems.

Question 20

____ may rest on a continuous concrete footing below grade, such as a basement wall, and extend above grade to form the exterior or interior walls of a building.

A) On-grade concrete slabs
B) Cast-in-place beams
C) Cast-in-place concrete columns
D) Reinforced concrete cast-in-place walls