CET 210 Concrete Wiki Assignment

David Shofstahl

Fall 2014

Old Dominion University

The following pages demonstrate many various local concrete applications in my area.

Concrete

Concrete Flatwork

New sidewalk at Warren Hall at Dabney S. Lancaster Community College

The surface was trowel

finished and broomed for a

course, combed texture to

improve traction.

Grooves were tooled into the uncured concrete to create

intentional weakness to control natural cracking.

Virginia Welcome Center, Interstate 64, mile marker 2

The main approach is

finished with raised

aggregate which provides

an attractive finish with

additional traction.

Control joints are cut wide and filled with flexible,

polyurethane sealant.

Garage floor at A&C Auto Repair, Clifton Forge, VA

This floor was finished

with a hard, smooth

surface and coated with

epoxy to withstand

chemicals, scratches,

and other abuses.

Control joints are sawn narrow and unfilled.

Outdoor patio at Rockbridge Alum Springs Young Life Camp in Goshen, Virginia

Pigments added to the

concrete mix and

additional color-treatment

during the stamping

process enhances the

texture.

½” isolation board separates the slab from the masonry seat-

wall, preventing damage by absorbing subtle movements from

expansion and contraction of the slab.

Cast-in-place Concrete

This concrete tunnel on Harts Run Road

near White Sulphur Springs, WV allows

traffic to go under the intersecting

railroad through its foundation.

Also notice the concrete retaining wall

that supports the road beside the creek.

These structures were formed on site and

poured.

This concrete dam controls storm water

run-off on a mountain side at the

Greenbrier Resort in White Sulphur

Springs, WV. The walls were formed in

place to fit the contour of the land.

The soil behind the dam is stabilized

with large which are locked in place

with shotcrete.

This concrete retaining wall alongside East Riverside St. in Covington, VA was

formed and cast in place. Notice the pipes located near the bottom of the wall.

These provide through-wall drainage of any static groundwater to reduce

hydraulic back-pressure against the wall.

Concrete is used extensively on highway bridge work. The concrete columns of this I-

64 overpass at mile marker 24 in Clifton Forge, VA were formed and poured in place.

The concrete smokestack at Mead-Westvaco in

Covington, VA was constructed with slip-form

methods. I am told that during construction the

builders completed an average of 1 ring every

day. This included releasing and raising the forms,

setting the steel reinforcement, and pumping and

pouring approximately 32 yards of concrete.

This stock Google image shows the

immensity of the towering smokestack

in proportion to the city of Covington.

This CMU retaining wall at a

private residence on the golf

course at the Greenbrier is re-

inforced with rebar and cast-

in-place high-strength grout.

This cast-in-place smoke chamber for a

wood-burning fireplace in a house at the

Glade Springs Resort near Beckley, WV is

made of refractory concrete that is

modified with dry milled fire clay. Inswol

ceramic wool insulation issolates the unit

from the masonry rough-in to allow for

thermal expansion and hear protection.

Shotcrete

This water feature at a residence in the Greenbrier

was built in an existing creek on a shotcrete

foundation. After the pool was excavated, workers

assembled the steel reinforcement and applied the

shotcrete. Dry Portland cement and sand are

delivered through a hose with compressed air while

water is added at the nozzle as it is sprayed into

place. The mix is applied in multiple passes and

contoured to shape with hand tools. The finished

product is very hard and durable.

Precast Concrete

These column caps at the Greenbrier Sporting Club in

White Sulphur Springs, WV are precast concrete. For

some custom shapes and applications, precast concrete

offers a cheaper alternative to natural stone

This custom mantle in a house at

the Greenbrier Sporting Club was

originally priced for hand-cut

limestone at nearly $50,000.00. A

precast manufacturer in Texas

produced this unit for less than

$4,000.00. Clearly, precast

concrete has price-point

advantages over natural stone!

Ornamental precast concrete is observed all

around us! Here is a concrete picnic table at

Dabney S. Lancaster Community College.

When I bought this precast concrete garden

gnome from Black Dog Architectural Salvage

in Roanoke, VA, it was gray and ugly,

weighing over 100 pounds. It was a family

adventure finding him a personality and

getting him painted and moved to the garden.