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Flexural Toughness of Fiber-Reinforced Concrete UsingCer ally Loaded Round Panels (ASTM C1550) The requirements of ASTM C1550-10a for determining flexural toughness of fiberreinforced concrete (FRC) create several challenges for most standard test systems inservice today. Specifically: ·Size of the specimen: With a diameter of 800 mm (31.5 in) most existing load testingframes do not have the test space width to accomodate this. •Required stiffness of the frame: The extra wide test frame, which includes all loadtrain components, must also have low deflection under load. ·Accurate specimen deflection measurment: Specimen deflection must be measuredaccurately, either by a fixture mounted measuring device or by the ram poostion correctingfor the machine compliance under load. ·Complex data analysis: The standard requires a detailed analysis of the load vs.deflection data to ensure the accurate reporting of flexural toughness. With most load testsystems, the required analysis involves exporting the data to a spreadsheet or otheranalysis tool for generating test results. Instron has supplied several test systems to companies in North America to meetthese challenges. Each system was configured and accessorized to suit the customersspecific needs but each system had the following things in common: ·A stiff load frame with a wide test space to accomodate the 800 mm diameter x75mm thick round panels ·Fixtures and measurment equipment to perform tests to ASTM C1550 and ASTMC1609. ·Instron servo controlller capable of advanced displacement and load control. ·PartnerM Software as a user interface for test set-up, control and results display andmanagement. Each system was able to perform the required tests efficiently and accurately with nouser interaction other than pushing the start button. After the test is completed PartnerSoftware performs all of the data analyis required by ASTM C1550-10a and displays thefindings on the screen for the operator to evalaute. The results and data are also stored inan Access database for later retrieval and access via a network. Each system was able to perform the required tests efficiently and accurately with no user interaction other than pushing the start button. After the test is completed Partner Software performs all of the data analyis required by ASTM C1550-10a and displays the findings on the screen for the operator to evalaute. The results and data are also stored in an Access database for later retrieval and access via a network.
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