Solving for Why
A Janney Technical Center Video Series
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
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.