Lightweight Concrete for High Strength - Expanded Shale & Clay

C.2.3 Formwork Removal, Detensioning, And Measurements
After the metal forms were removed, the DEMEC steel embedment strips were
unscrewed and stripped out. Initial DEMEC readings were taken. After all strands were cut, the
“release” concrete surface strain, VWSG, and deflection readings and subsequent readings were
recorded. After prestress release, the girders were moved to a storage area and placed on
wooden dunnage located at the centers of bearing (6 inches from each end). While in storage,
Georgia Tech researchers took readings as outlined in Chapter 5 to examine transfer length
(Figure C.17).
Figure C.17 Dr. Karl F. Meyer taking DEMEC strain measurements.
C.2.4 Completion of Construction at Structures Laboratory
After curing for approximately 3-4 weeks at the Tindall Plant, the girders were
transported on flatbed trucks to the Georgia Tech Structures Lab. In the lab, the girders were
stored as they had been at the concrete plant. One final set of surface strain, VWSG, and
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