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Find a library where document is available. Backcalculation of Residual Tensile Strength of Regular and Ultra High Performance Fiber Reinforced Concrete From Flexural Tests Barzin Mobasher1, Mehdi Bakhshi2, Christopher Barsb圓 Abstract The tensile stress-strain response of a fiber reinforced concrete dominates the performance under many loading conditions and applications.2documents the procedure and steps used to back-calculate the layered elastic properties (Youngs modulus and the coefficient and exponent of the nonlinear constitutive.
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FWD deflections were compared with deflections predicted by inputting PPMT moduli and CT moduli into the finite-element program ILLI-PAVE. 1 documents the results of backcalculation of layer material properties for rigid pavements included in the Long Term Pavement Performance (LTPP) program in the United States and Canada using deflection testing data. The moduli comparison indicated that the pavement pressuremeter was capable of yielding moduli similar to both the cyclic triaxial and falling weight deflectometer tests. The PPMT moduli from the four models were compared with moduli from cyclic triaxial (CT) tests and moduli backcalculated from falling weight deflectometer (FWD) tests. An airport PPMT test was developed which enabled four models to be evaluated. Four models which predict the modulus for various stress levels, various strain levels, various loading rates or creep, and repetitive loadings were chosen since these loads are all encountered on airport pavements. FWD BACKCALCULATED MODULI COMPARED WITH PAVEMENT PRESSUREMETER MODULI CYCLIC TRIAXIAL MODULIĪ relatively new in situ testing device, the pavement pressuremeter (PPMT), was used on three airport pavement subgrades in order to evaluate its usefulness in pavement design and evaluation.