ASTM D6916-18
(Test Method)Standard Test Method for Determining the Shear Strength Between Segmental Concrete Units (Modular Concrete Blocks)
Standard Test Method for Determining the Shear Strength Between Segmental Concrete Units (Modular Concrete Blocks)
SIGNIFICANCE AND USE
5.1 The shear strength between segmental concrete units (with and without geosynthetic reinforcement) is used in design of reinforced soil retaining walls.
5.2 This test is used to determine the shear strength for the design of the facing stability of segmental retaining walls. Performing a series of these shear tests at varying normal loads permits development of a relationship between shear strength and normal load. This relationship may be linear, bilinear, or some other complex mathematical expression.
5.3 This shear strength test is meant to be a performance test (laboratory or field); therefore, it should be conducted using full-scale system components. The conditions for the test are selected by the user and are not for routine testing.
5.4 As a performance test on full-scale system components, it accounts for some of the variables in construction procedures and materials tolerance normally present for these types of retaining wall systems.
SCOPE
1.1 This test method is used to determine the shear strength between two layers of segmental concrete block units used in construction of reinforced soil retaining walls. The test is carried out under conditions determined by the user that reproduce the facing system at full scale. The results of a series of tests are used to define a relationship between shear strength developed between segmental concrete units and normal load.
1.2 This is a performance test used to determine properties for design of retaining wall systems utilizing segmental concrete units and soil reinforcing geosynthetics, either geotextiles or geogrids. The test is performed on a full-scale construction of the facing system and may be run in a laboratory or the field.
1.3 The values stated in SI units are regarded as the standard. The values stated in inch-pound units are provided for information only.
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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: D6916 − 18
Standard Test Method for
Determining the Shear Strength Between Segmental
1
Concrete Units (Modular Concrete Blocks)
This standard is issued under the fixed designation D6916; 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 D4354 Practice for Sampling of Geosynthetics and Rolled
Erosion Control Products (RECPs) for Testing
1.1 This test method is used to determine the shear strength
D4439 Terminology for Geosynthetics
between two layers of segmental concrete block units used in
D4595 Test Method for Tensile Properties of Geotextiles by
construction of reinforced soil retaining walls. The test is
the Wide-Width Strip Method
carried out under conditions determined by the user that
D6637/D6637M Test Method for Determining Tensile Prop-
reproduce the facing system at full scale.The results of a series
erties of Geogrids by the Single or Multi-Rib Tensile
of tests are used to define a relationship between shear strength
Method
developed between segmental concrete units and normal load.
1.2 This is a performance test used to determine properties
3. Terminology
for design of retaining wall systems utilizing segmental con-
3.1 Definitions:
crete units and soil reinforcing geosynthetics, either geotextiles
3.1.1 displacement criteria, n—a user-prescribed maximum
or geogrids. The test is performed on a full-scale construction
movement, mm (in.), of the top segmental concrete unit out
ofthefacingsystemandmayberuninalaboratoryorthefield.
from the back of lower segmental concrete units.
1.3 The values stated in SI units are regarded as the
3.1.2 geosynthetic, n—a planar product manufactured from
standard. The values stated in inch-pound units are provided
polymeric material used with soil, rock, earth, or other geo-
for information only.
technical engineering-related material as an integral part of a
1.4 This standard does not purport to address all of the
manmade project, structure, or system. D4439
safety concerns, if any, associated with its use. It is the
3.1.3 granular infill, n—coarse-grained soil aggregate used
responsibility of the user of this standard to establish appro-
to fill the voids in and between segmental concrete units.
priate safety, health, and environmental practices and deter-
mine the applicability of regulatory limitations prior to use. 3.1.4 peak shear strength, n—the maximum shear capacity
1.5 This international standard was developed in accor- between segmental concrete units.
dance with internationally recognized principles on standard-
3.1.5 segmental concrete depth, n—the segmental concrete
ization established in the Decision on Principles for the
unit dimension perpendicular to the wall face.
Development of International Standards, Guides and Recom-
3.1.6 segmental concrete unit (modular concrete block),
mendations issued by the World Trade Organization Technical
n—a concrete unit manufactured specifically for mortarless,
Barriers to Trade (TBT) Committee.
dry-stack retaining wall construction.
2. Referenced Documents
3.1.7 segmental concrete unit width, n—the segmental con-
2
crete unit dimension parallel to the wall face.
2.1 ASTM Standards:
D448 Classification for Sizes of Aggregate for Road and
3.2 For definitions of other terms relating to geosynthetics,
Bridge Construction
refer to Terminology D4439.
4. Summary of Test Method
1
This test method is under the jurisdiction of ASTM Committee D35 on
Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechani-
4.1 In this test method, segmental concrete units are as-
cal Properties.
sembled in two rows (layers). The bottom row is laterally
Current edition approved July 15, 2018. Published August 2018. Originally
restrained. The top row is loaded vertically to a constant
approved in 2003. Last previous edition approved in 2011 as D6916 – 06c (2011).
DOI: 10.1520/D6916-18.
surcharge load, and the interface is sheared at a constant rate of
2
For referenced ASTM standards, visit the ASTM Web Site, www.astm.org. or
displacement until a drop of load after the peak load occurs.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
The test may be run with the geosynthetic reinforcement
Standards volume information, refer to the standard’s Document Summary page on
the ASTM web site. sandwiched between the two rows of segmental concrete units
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Cons
...
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: D6916 − 06c (Reapproved 2011) D6916 − 18
Standard Test Method for
Determining the Shear Strength Between Segmental
1
Concrete Units (Modular Concrete Blocks)
This standard is issued under the fixed designation D6916; 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
1.1 This test method is used to determine the shear strength between two layers of segmental concrete block units used in
construction of reinforced soil retaining walls. The test is carried out under conditions determined by the user that reproduce the
facing system at full-scale. full scale. The results of a series of tests are used to define a relationship between shear strength
developed between segmental concrete units and normal load.
1.2 This is a performance test used to determine properties for design of retaining wall systems utilizing segmental concrete
units and soil reinforcing geosynthetics, either geotextiles or geogrids. The test is performed on a full-scale construction of the
facing system and may be run in a laboratory or the field.
1.3 The values stated in SI units are regarded as the standard. The values stated in inch-pound units are provided for information
only.
1.4 This standard may involve hazardous materials, operations, and equipment. 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 safety, health, and healthenvironmental practices and determine the applicability of regulatory limitations prior to use.
1.5 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2
2.1 ASTM Standards:
D448 Classification for Sizes of Aggregate for Road and Bridge Construction
D4354 Practice for Sampling of Geosynthetics and Rolled Erosion Control Products (RECPs) for Testing
D4439 Terminology for Geosynthetics
D4595 Test Method for Tensile Properties of Geotextiles by the Wide-Width Strip Method
D6637D6637/D6637M Test Method for Determining Tensile Properties of Geogrids by the Single or Multi-Rib Tensile Method
3. Terminology
3.1 Definitions:
3.1.1 displacement criteria, n—a user prescribed user-prescribed maximum movement, mm (in.), of the top segmental concrete
unit out from the back of lower segmental concrete units.
3.1.2 geosynthetic, n—a planar product manufactured from polymeric material used with soil, rock, earth, or other geotechnical
engineering related engineering-related material as an integral part of a man-mademanmade project, structure, or system. D4439
3.1.3 granular infill, n—coarse grained coarse-grained soil aggregate used to fill the voids in and between segmental concrete
units.
3.1.4 peak shear strength, n—the maximum shear capacity between segmental concrete units.
3.1.5 segmental concrete depth, n—the segmental concrete unit dimension perpendicular to the wall face.
1
This test method is under the jurisdiction of ASTM Committee D35 on Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechanical Properties.
Current edition approved Oct. 1, 2011July 15, 2018. Published October 2011August 2018. Originally approved in 2003. Last previous edition approved in 20062011 as
D6916D6916 – 06c (2011).–06c. DOI: 10.1520/D6916-06CR11.10.1520/D6916-18.
2
For referenced ASTM standards, visit the ASTM Web Site, 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 web site.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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D6916 − 18
FIG. 1 Shear Test Apparatus (Cross Section View)
3.1.6 segmental concrete unit (modular concrete block), n—a concrete unit manufactured specifically for mortarless, dry-stack
retaining wall construction.
3.1.7 segmental concrete unit width, n—the segmental concrete unit dimension parallel to the wall face.
3.2 For
...
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