ASTM D7380-15
(Test Method)Standard Test Method for Soil Compaction Determination at Shallow Depths Using 5-lb (2.3 kg) Dynamic Cone Penetrometer
Standard Test Method for Soil Compaction Determination at Shallow Depths Using 5-lb (2.3 kg) Dynamic Cone Penetrometer
SIGNIFICANCE AND USE
5.1 The test method is used to assess the compaction effort of compacted materials. The number of drops required to drive the cone a distance of 3.25 in. (83 mm) is used as a criterion to determine the pass or fail in terms of soil percent compaction.
5.2 The device does not measure soil compaction directly and requires determining the correlation between the number of drops and percent compaction in similar soil of known percent compaction and water content.
5.3 The number of drops is dependent on the soil water content. Calibration of the device should be performed at a water content equal to the water content expected in the field.
5.4 There are other DCPs with different dimensions, hammer weights, cone sizes, and cone geometries. Different test methods exist for these devices (such as D6951) and the correlations of the 5-lb DCP with soil percent compaction are unique to this device.
5.5 The 5-lb DCP is a simple device, capable of being handled and operated by a single operator in field conditions. It is typically used as Quality Control (QC) of layer-by-layer compaction by construction crew in roadway pavement, backfill compaction in confined cuts and trenches, and utility pavement restoration work.
Note 1: The quality of results produced by this test method is dependent on the competence of the personnel performing it and the suitability of the equipment and facilities used. Agencies that meet the criteria of Practice D3740 are generally considered capable of competent and objective testing/sampling/inspection/etc. Users of this standard are cautioned that compliance with Practice D3740 does not in itself assure reliable results. Reliable results depend on many factors; Practice D3740 provides a means of evaluating some of these factors.
SCOPE
1.1 This test method covers the procedure for the determination of the number of drops required for a dynamic cone penetrometer with a 5-lb (2.3-kg) drop hammer falling 20 in. (508 mm) to penetrate a certain depth in compacted backfill.
1.2 The device is used in the compaction verification of fine- and coarse-grained soils, granular materials, and weak stabilized or modified material used in subgrade, base layers, and backfill compaction in confined cuts and trenches at shallow depth.
1.3 The test method is not applicable to highly stabilized and cemented materials or granular materials containing a large percentage of aggregates greater than 1.5 in. (37 mm).
1.4 The method is dependent upon knowing the field water content and the user having performed calibration tests to determine cone penetration resistance of various compaction levels and water contents.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.6 It is common practice in the engineering profession to concurrently use pounds to represent both a unit of mass (lbm) and a force (lbf). This implicitly combines two separate systems of units; that is, the absolute system and the gravitational system. This standard has been written using the gravitational system of units when dealing with the inch-pound system. In this system, the pound (lbf) represents a unit of force (weight). However, the use of balances or scales recording pounds of mass (lbm) or the reading of density in lbm/ft3 shall not be regarded as a nonconformance with this standard.
1.7 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice D6026.
1.8 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.
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Designation: D7380 − 15
Standard Test Method for
Soil Compaction Determination at Shallow Depths Using
1
5-lb (2.3 kg) Dynamic Cone Penetrometer
This standard is issued under the fixed designation D7380; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* 1.8 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
1.1 This test method covers the procedure for the determi-
responsibility of the user of this standard to establish appro-
nation of the number of drops required for a dynamic cone
priate safety and health practices and determine the applica-
penetrometer with a 5-lb (2.3-kg) drop hammer falling 20 in.
bility of regulatory limitations prior to use.
(508 mm) to penetrate a certain depth in compacted backfill.
1.2 The device is used in the compaction verification of
2. Referenced Documents
fine- and coarse-grained soils, granular materials, and weak 2
2.1 ASTM Standards:
stabilized or modified material used in subgrade, base layers,
D653 Terminology Relating to Soil, Rock, and Contained
and backfill compaction in confined cuts and trenches at
Fluids
shallow depth.
D698 Test Methods for Laboratory Compaction Character-
3
1.3 The test method is not applicable to highly stabilized istics of Soil Using Standard Effort (12 400 ft-lbf/ft (600
3
andcementedmaterialsorgranularmaterialscontainingalarge
kN-m/m ))
percentage of aggregates greater than 1.5 in. (37 mm). D1556 Test Method for Density and Unit Weight of Soil in
Place by Sand-Cone Method
1.4 The method is dependent upon knowing the field water
D1557 Test Methods for Laboratory Compaction Character-
content and the user having performed calibration tests to
3
istics of Soil Using Modified Effort (56,000 ft-lbf/ft
determine cone penetration resistance of various compaction
3
(2,700 kN-m/m ))
levels and water contents.
D2216 Test Methods for Laboratory Determination of Water
1.5 The values stated in inch-pound units are to be regarded
(Moisture) Content of Soil and Rock by Mass
as standard. The values given in parentheses are mathematical
D3740 Practice for Minimum Requirements for Agencies
conversions to SI units that are provided for information only
Engaged in Testing and/or Inspection of Soil and Rock as
and are not considered standard.
Used in Engineering Design and Construction
1.6 It is common practice in the engineering profession to D4959 Test Method for Determination of Water (Moisture)
concurrently use pounds to represent both a unit of mass (lbm) Content of Soil By Direct Heating
and a force (lbf). This implicitly combines two separate D6026 Practice for Using Significant Digits in Geotechnical
systems of units; that is, the absolute system and the gravita- Data
tional system. This standard has been written using the D6938 TestMethodsforIn-PlaceDensityandWaterContent
gravitational system of units when dealing with the inch-pound of Soil and Soil-Aggregate by Nuclear Methods (Shallow
system.Inthissystem,thepound(lbf)representsaunitofforce Depth)
(weight). However, the use of balances or scales recording D6951 TestMethodforUseoftheDynamicConePenetrom-
3
pounds of mass (lbm) or the reading of density in lbm/ft shall eter in Shallow Pavement Applications
not be regarded as a nonconformance with this standard. E691 Practice for Conducting an Interlaboratory Study to
Determine the Precision of a Test Method
1.7 All observed and calculated values shall conform to the
guidelines for significant digits and rounding established in
3. Terminology
Practice D6026.
3.1 Definitions—For definitions of common technical terms
used in this standard, refer to Terminology D653.
1
ThistestmethodisunderthejurisdictionofASTMCommitteeD18onSoiland
Rock and is the direct responsibility of Subcommittee D18.08 on Special and
2
Construction Control Tests. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Nov. 1, 2015. Published November 2015. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2008. Last previous edition approved in 2008 as D7380 - 08. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D7380-15. the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D7380 − 15
3.2 Definitions of Terms Specific to This Standard: 4. Summary of Test Method
3.2.1 5-lb dynamic cone pe
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: D7380 − 08 D7380 − 15
Standard Test Method for
Soil Compaction Determination at Shallow Depths Using
1
5-lb (2.3 kg) Dynamic Cone Penetrometer
This standard is issued under the fixed designation D7380; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope Scope*
1.1 This test method covers the procedure for the determination of the number of drops required for a dynamic cone
penetrometer with a 5-lb (2.3-kg) drop hammer falling 20 in. (508 mm) to penetrate a certain depth in compacted backfill.
1.2 The device is used in the compaction verification of fine- and coarse-grained soils, granular materials, and weak stabilized
or modified material used in subgrade, base layers, and backfill compaction in confined cuts and trenches at shallow depth.
1.3 The test method is not applicable to highly stabilized and cemented materials or granular materials containing a large
percentage of aggregates greater than 1.5 in. (37 mm).
1.4 The method is dependent upon knowing the field water content and the user having performed calibration tests to determine
cone penetration resistance of various compaction levels and water contents.
1.5 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
1.6 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered It is common practice in the engineering
profession to concurrently use pounds to represent both a unit of mass (lbm) and a force (lbf). This implicitly combines two
separate systems of units; that is, the absolute system and the gravitational system. This standard has been written using the
gravitational system of units when dealing with the inch-pound system. In this system, the pound (lbf) represents a unit of force
3
(weight). However, the use of balances or scales recording pounds of mass (lbm) or the reading of density in lbm/ft shall not be
regarded as a nonconformance with this standard.
NOTE 1—It is common practice in the engineering profession to concurrently use pounds to represent both a unit of mass (lbm) and a force (lbf). This
standard has been written using the gravitational system of units (lbf) when dealing with the inch-pound system. In this system, the pound (lbf) represents
3
a unit of force (weight). However, the use of balances or scales recording pounds of mass (lbm) or the reading of density in lbm/ft shall not be regarded
as a nonconformance with this standard.
1.7 All observed and calculated values shall conform to the guidelines for significant digits and rounding established in Practice
D6026.
1.8 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
2
2.1 ASTM Standards:
D653 Terminology Relating to Soil, Rock, and Contained Fluids
3 3
D698 Test Methods for Laboratory Compaction Characteristics of Soil Using Standard Effort (12 400 ft-lbf/ft (600 kN-m/m ))
D1556 Test Method for Density and Unit Weight of Soil in Place by Sand-Cone Method
3
D1557 Test Methods for Laboratory Compaction Characteristics of Soil Using Modified Effort (56,000 ft-lbf/ft (2,700
3
kN-m/m ))
1
This test method is under the jurisdiction of ASTM Committee D18 on Soil and Rock and is the direct responsibility of Subcommittee D18.08 on Special and Construction
Control Tests.
Current edition approved April 1, 2008Nov. 1, 2015. Published April 2008November 2015. Originally approved in 2008. Last previous edition approved in 2008 as
D7380 - 08. DOI: 10.1520/D7380-08.10.1520/D7380-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive,
...
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