Week 5 COSC 253

A structural concrete column in which the top portion has an element that help support the structure above.(one word, do not capitalize)

capital

An intentional, linear discontinuity in a structure or component designed to form a plane of weakness where cracking can occur in response to various forces so as to minimize or eliminate cracking elsewhere. Also called a contraction joint.(two words, put a space between words, no capitalization)

control joint

A liquid that, when sprayed on the surface of newly placed concrete, forms a water-resistant layer to prevent premature dehydration of the concrete.(two words, put one space between words, do not capitalize)

curing compound

An arch rotated about its vertical axis to produce a structure shaped like an inverted bowl; a form used to make one of the cavities in a concrete waffle slab.(one word, do not capitalize)

dome

A short cylindrical rod of wood or steel; a steel reinforcing bar that projects from a foundation to tie it to a column or wall, or from one section of a concrete slab or wall to another.(one word, do not capitalize)

dowel

What is #3 point to in the photo below?

dowels and a key

Slip forming would be most beneficial when constructing:

elevator shafts or storage silos.

A trowel with a slightly rough surface used in an intermediate stage of finishing a concrete slab; used as a verb for finishing concrete.(one word, do not capitalize)

floating

A steel or plastic rod with fasteners on either end, used to hold together the two surfaces of formwork for a concrete wall.(two words, put a space between words, no capitalization)

form tie

A system of lightweight components, most commonly made of rigid polystyrene insulating foam, used as permanent formwork for the casting of concrete walls.(three words, add one space between words, do not capitalize)

insulating concrete form

The accompanying sketch depicts a:

one-way concrete joist system.

The accompanying drawing shows a:

one-way solid slab system.

This picture is an example of:

onsolidating wet concrete after pouring.

A form used to produce the cavity between joists in a one-way concrete joist system.(one word, do not capitalize)

pan

Insulating concrete forms (ICFs):

place the insulation at the core of the concrete wall.

What is #1 point to in the photo below?

reinforcing bars

A step in the finishing of concrete slabs for the purpose of removing minor undulations produced during floating or troweling.(one word, do not capitalize)

restraightening

Temporary vertical or sloping supports of steel or timber.(one word, do not capitalize)

shoring

A low-slump concrete mixture that is deposited by being blown from a nozzle at high speed with a stream of compressed air; pneumatically placed concrete.(one word, do not capitalize)

shotcrete

The waffle slab is:

the two-way concrete joist framing system.

What is #2 point to in the photo below?

ties

A material intended to resist the diffusion of water vapor into a building assembly.(two words, put a space between words, no capitalization)

vapor retarder

A horizontal beam used to support sheeting or concrete formwork.(one word, do not capitalize)

waler

This picture shows an example of:

A climbing system of formwork.

This photo is an example of:

A one-way concrete joist system.

This series of pictures is showing the construction and finishing a concrete slab on grade:

True

Which of these concrete systems typically has the smallest construction height (floors and beams)?

Two-way flat plate

Form ties are associated with which concrete element?

Walls

This picture is an example of:

a form tie for a concrete wall

Reshoring is:

a set of supports for lower floors while upper floors get poured.

This picture could be an example of a concrete slab for:

a sidewalk

Diagonal members, either temporary or permanent, installed to stabilize a structure against lateral loads.(one word, do not capitalize)

bracing

These connections between column and concrete slabs are typically found on one way concrete systems.

False

Which of the following is not associated with finishing a concrete slab on grade?

Posttensioning tendons

In slab placement, what comes directly before concrete floating?

Strike-off

In this series of photos, picture (g) is showing floating of the slab.

True

Concrete slab shrinkage cracks are primarily reduced by:

adding wire-mesh rebar.