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Pavements and Backcalculation of Moduli, ASTM STP 1026, A.J. The filter with residue is washed, dried, and weighed to give the final result. The traditional method for interpreting the FWD data to backcalculate. Find a library where document is available. ASTM D4807 Standard Test Method for Sediment in Crude Oil by Membrane Filtration: A portion of a representative crude oil sample is dissolved in hot toluene and filtered under vacuum through a 0.45-m porosity membrane filter.The paper presents the details of the simple instrument, developed at a low cost to measure the rebound deflection bowl and a methodology for the backcalculation of E values of pavement layers using the rebound deflection bowl data. As most of these pavements consists of granular layers in the subbase and base course with a thin bituminous surface course, the rebound deflection bowl data collected were utilized for the backcalculation of E values of pavement layers by finite-element method using the computer program FEAP. This instrument was used to measure the ordinates of rebound deflection bowls on selected test stretches of flexible pavements in the southern region of India.
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A SIMPLE METHOD OF MEASURING PAVEMENT REBOUND DEFLECTION BOWL DATA AND CALCULATING MODULIĪ simple instrument was developed by modifying the Benkelman beam so that the ordinates of the rebound deflection bowl could be measured at five points at 75-mm intervals from the center of dual wheel load, using four additional sets of auxiliary levers and dial gauges. PLEASE NOTE: ASTM International is providing no-cost public access to important ASTM standards used in the production and testing of personal protective.