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1.1 This test method covers the determination of deflections of paved and unpaved surfaces with a Light Weight Deflectometer (LWD). This device is also referred to as a Portable Falling-Weight Deflectometer (PFWD). The LWD is lightweight, portable and generally used for testing unbound pavement layers. The deflections measured using an LWD can be used to determine the stiffness of bound and unbound pavement surfaces using appropriate back- or forwardcalculation analysis techniques.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D2487 Practice for Classification of Soils for Engineering Purposes (Unified Soil Classification System)
D4695 Guide for General Pavement Deflection Measurements
Other StandardsFHWA-HRT-06-132 Version 4.1 Long-Term Pavement Performance Program Manual for Falling Weight Deflectometer Measurements
ICS Number Code 93.080.10 (Road construction)