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See Chinese contents: JT/T 120-2008 JT/T 120-2008: Benkelman beam pavement deflectometer
This standard specifies the product model, structure, technical requirements, testing methods, inspection rules, marking, packaging, transportation, storage of the Benkelman beam pavement deflectometer. For the Benkelman beam pavement deflectometer, which is specified in this standard, it is suitable for testing the total deflection or rebound deflection, deflection basin, modulus of deflection of the subgrade, base layer, pavement of the flexible pavement structure and semi-rigid pavement structure, of different levels. It is also suitable for testing the load transfer capacity between rigid pavement slabs.
