ASTM D6638-18
(Test Method)Standard Test Method for Determining Connection Strength Between Geosynthetic Reinforcement and Segmental Concrete Units (Modular Concrete Blocks)
Standard Test Method for Determining Connection Strength Between Geosynthetic Reinforcement and Segmental Concrete Units (Modular Concrete Blocks)
SIGNIFICANCE AND USE
5.1 The connection strength between geosynthetic reinforcement and segmental concrete block units is used in design of reinforced soil retaining walls.
5.2 This test is used to determine the connection strength for the design of the connection system formed by segmental concrete block units and geosynthetic reinforcement layers in reinforced soil retaining walls. Performing a series of these connection tests at varying normal loads permits development of a relationship between connection strength and normal load. This relationship may be linear, bilinear, or some other complex mathematical expression.
5.3 This connection 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 connection properties between a layer of geosynthetic reinforcement and 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 connection system at full scale. The results of a series of tests are used to define a relationship between connection strength for a segmental unit-geosynthetic connection system 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 connection 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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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: D6638 − 18
Standard Test Method for
Determining Connection Strength Between Geosynthetic
Reinforcement and Segmental Concrete Units (Modular
1
Concrete Blocks)
This standard is issued under the fixed designation D6638; 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 2. Referenced Documents
2
1.1 This test method is used to determine the connection 2.1 ASTM Standards:
properties between a layer of geosynthetic reinforcement and D448 Classification for Sizes of Aggregate for Road and
segmental concrete block units used in construction of rein- Bridge Construction
forced soil retaining walls. The test is carried out under D4354 Practice for Sampling of Geosynthetics and Rolled
conditions determined by the user that reproduce the connec- Erosion Control Products (RECPs) for Testing
tion system at full scale.The results of a series of tests are used D4439 Terminology for Geosynthetics
to define a relationship between connection strength for a D4495 Test Method for Impact Resistance of Poly(Vinyl
segmental unit-geosynthetic connection system and normal Chloride) (PVC) Rigid Profiles by Means of a Falling
load. Weight
D6637/D6637M Test Method for Determining Tensile Prop-
1.2 This is a performance test used to determine properties
erties of Geogrids by the Single or Multi-Rib Tensile
for design of retaining wall systems utilizing segmental con-
Method
crete units and soil reinforcing geosynthetics, either geotextiles
or geogrids. The test is performed on a full-scale construction
3. Terminology
of the connection and may be run in a laboratory or the field.
3.1 Definitions:
1.3 The values stated in SI units are regarded as the
3.1.1 displacement criteria, n—a user-prescribed maximum
standard. The values stated in inch-pound units are provided
movement, mm (in.), of the geosynthetic reinforcement out
for information only.
from the back of segmental concrete units.
1.4 This standard does not purport to address all of the
3.1.2 geosynthetic, n—a planar product manufactured from
safety concerns, if any, associated with its use. It is the
polymeric material used with soil, rock, earth, or other geo-
responsibility of the user of this standard to establish appro-
technical engineering-related material as an integral part of a
priate safety, health, and environmental practices and deter-
manmade project, structure, or system. D4439
mine the applicability of regulatory limitations prior to use.
3.1.3 granular infill, n—coarse-grained soil aggregate used
1.5 This international standard was developed in accor-
to fill the voids in and between segmental concrete units.
dance with internationally recognized principles on standard-
3.1.4 peak connection strength, n—the maximum tensile
ization established in the Decision on Principles for the
capacity of the connection between geosynthetic reinforcement
Development of International Standards, Guides and Recom-
and segmental concrete units.
mendations issued by the World Trade Organization Technical
Barriers to Trade (TBT) Committee.
3.1.5 segmental concrete unit (modular concrete block),
n—a concrete unit manufactured specifically for mortarless,
dry-stack retaining wall construction.
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-
2
cal Properties For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved July 15, 2018. Published August 2018. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 2001. Last previous edition approved in 2011 as D6638 – 11. DOI: Standards volume information, refer to the standard’s Document Summary page on
10.1520/D6638-18. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6638 − 18
3.1.6 segmental concrete unit width, n—the segmental con- This relationship may be linear, bilinear, or some other
crete unit dimension parallel to the wall face and coincident complex mathematical expression.
with the geosynthetic reinforcement test specimen width.
5.3 This connection strength test is meant to be a perfor-
3.1.7 service-state connection strength, n—the connection
mance test (laboratory or field); therefore, it should be con-
tensile capacity at a serv
...
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: D6638 − 11 D6638 − 18
Standard Test Method for
Determining Connection Strength Between Geosynthetic
Reinforcement and Segmental Concrete Units (Modular
1
Concrete Blocks)
This standard is issued under the fixed designation D6638; 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 connection properties between a layer of geosynthetic reinforcement and
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 connection system at full-scale. full scale. The results of a series of tests are used to
define a relationship between connection strength for a segmental unit-geosynthetic connection system 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
connection 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
D4495 Test Method for Impact Resistance of Poly(Vinyl Chloride) (PVC) Rigid Profiles by Means of a Falling Weight
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 geosynthetic
reinforcement out from the back of 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.
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 June 1, 2011July 15, 2018. Published July 2011August 2018. Originally approved in 2001. Last previous edition approved in 20072011 as
D6638 – 07.D6638 – 11. DOI: 10.1520/D6638-11.10.1520/D6638-18.
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.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6638 − 18
3.1.4 peak connection strength, n—the maximum tensile capacity of the connection between geosynthetic reinforcement and
segmental concrete units.
3.1.5 segmental concrete unit (modular concrete block), n—a concrete unit manufactured specifically for mortarless, dry-stack
retaining wall construction.
3.1.6 segmental concrete unit width, n—the segmental concrete unit dimension parallel to the wall face and coincident with the
geosynthetic re
...
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