Solving for Why: Pull-Off Adhesion Testing of Coatings

WJE chemist Leonard Phelps performs a pull-off adhesion test of a paint coating to determine the load necessary to pull the paint coating off, the resulting stress level, and the type of failure that occurs.

 
Solving for Why: Fitness-for-Service Assessments

WJE mechanical engineer Scott Bouse describes how we performed a fitness-for-service assessment to project remaining service life and instruct a client's repair strategy.

 
Solving for Why: Metal Fatigue Failures

WJE mechanical engineer Melanie Sarzynski demonstrates metal fatigue failure and explains how engineers calculate fatigue life for metal equipment and components, such as pipes.

 
Solving for Why: Differential Scanning Calorimetry

WJE chemist Jeff Plumridge demonstrates the use of differential scanning calorimetry to measure the degree of oxidation in a plastic pipe that prematurely failed while in service.

 
Solving for Why: Concrete Curing in the Lab

Materials engineer Elizabeth Wagner demonstrates how WJE cures concrete in our laboratory to determine how it will perform in the field or to confirm the characteristics of recently placed concrete.

 
Solving for Why: Scanning Electron Microscopy

Petrographer Hugh Hou and metallurgist David Schmit demonstrate how they use scanning electron microscopy to characterize the chemical composition of distressed concrete and identify corrosive elements in piping.

 
Solving for Why: Tensile Test of Seven-Wire Steel Strand

Structural engineer John Pearson loads a seven-wire steel strand to failure, demonstrating a common test performed in the JTC structural laboratory.

 
Solving for Why: Metallographic Weld Evaluation

Metallurgist Jon Hovde examines the microstructure of a prematurely failed weld to determine the cause of the failure and to develop a prevention strategy.

 
Solving for Why: Locating Embedded Metals in Reinforced Concrete Structures

WJE structural engineer Thomas Frankie demonstrates the use of one nondestructive evaluation tool—a hand-held ground penetrating radar unit—to locate as-built structural elements in a historic building lacking original construction drawings.

 
Solving for Why: Concrete Compressive Strength Testing

WJE materials engineer Todd Nelson demonstrates proper concrete core sample preparation followed by destructive testing to measure its compressive strength.

 
Solving for Why: Vibration Monitoring to Locate Building Noises

WJE engineer Bob Hannen explains how a series of accelerometers and a proprietary vibration monitoring program can be used to triangulate the source of bothersome or mysterious building noises.

 
SOLVING FOR WHY: Detecting Voids in Slabs with Ground Penetrating Radar

WJE senior specialist Dan Wetherington demonstrates the use of GPR and discusses how we interpret and use the data collected.

 
SOLVING FOR WHY: Corrosion Evaluation of Reinforced Concrete

WJE engineer Stephen Garrett demonstrates three assessment methods for evaluating corrosion of reinforced concrete structures: half cell potential testing, surface resistivity testing, and instantaneous corrosion rate measurement.

 
SOLVING FOR WHY: Vacuum Chamber Glass Test

WJE instrumentation specialist Roger Pelletier demonstrates a vacuum chamber test: loading a glass window to failure to determine whether noted surface conditions significantly affected the glass's structural integrity.

 
SOLVING FOR WHY: Atomic Absorption Spectroscopy

WJE chemist Tonya Werner demonstrates the use of our atomic absorption instrument to identify the concentration of different elements in a mortar sample.

 
SOLVING FOR WHY: Monotonic tension test

WJE structural engineer Scott Graham demonstrates a monotonic tension test—pulling rebar apart until it breaks—using our Tinius Olsen test machine.

 
SOLVING FOR WHY: Evaluating Water-to-Cement Ratio

WJE petrographers Daniela Mauro and George Reo demonstrate a series of evaluations performed to judge the durability of a concrete core.

 

Solving for why: ACCELERATED WEATHERING TO TEST STONE DURABILITY

WJE architect Daren Kneezel explains the process by which we test the durability of dimension stone cladding.

 
SOLVING FOR WHY: MATERIAL IDENTIFICATION USING FTIR

WJE chemist Kim Steiner walks through one method used to identify materials.