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ASTM D4694-96(2003)

Historical Reaffirmation

Standard Test Method for Deflections with a Falling-Weight-Type Impulse Load Device

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1.1 This test method covers the measurement of deflections of paved and unpaved surfaces with a falling-weight-type impulse load device. These devices are commonly referred to as falling-weight deflectometers or FWDs.

1.2 This test method describes the measurement of vertical deflection response of the surface to an impulse load applied to the pavement surface. Vertical deflections are measured on the load axis and at points spaced radially outward from the load axis.

Note 1—Subcommittee D04.39 is currently working on the development of a Precision and Bias statement. Therefore, the committee recommends that the results from this test method should not be used in a buying or selling relationship for construction materials or construction materials acceptance.

1.3 The values stated in SI units are to be regarded as the standard.

1.4 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. A specific hazard statement is given in Section 6.


This test method covers the determination of pavement surface deflections as a result of the application of an impulse load to the pavement surface. The resulting deflections are measured at the center of the applied load and at various distances away from the load. Deflections may be either correlated directly to pavement performance or used to determine the in-situ material characteristics of the pavement layers. Some uses of data include structural evaluation of load carrying capacity and determination of overlay thickness requirements for highway and airfield pavements.

SDO ASTM: ASTM International
Document Number D4694
Publication Date Dec. 1, 2003
Language en - English
Page Count 3
Revision Level 96(2003)
Supercedes
Committee E17.41
Publish Date Document Id Type View
Nov. 1, 2009 D4694-09 Revision
Jan. 1, 1995 D4694-96 Revision
Nov. 1, 2020 D4694-09R20 Reaffirmation
May 1, 2015 D4694-09R15 Reaffirmation
Dec. 1, 2003 D4694-96R03 Reaffirmation