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ASTM D6638-07

(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
The connection strength between geosynthetic reinforcement and segmental concrete block units is used in design of reinforced soil retaining walls.
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, bi-linear, or some other complex mathematical expression.
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.
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.
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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

Status
Historical
Publication Date
31-May-2007
ICS
91.100.50 - Binders. Sealing materials
Technical Committee
D35 - Geosynthetics
Drafting Committee
D35.01 - Mechanical Properties
Current Stage
Ref Project

Relations

Replaces
ASTM D6638-06 - Standard Test Method for Determining Connection Strength Between Geosynthetic Reinforcement and Segmental Concrete Units (Modular Concrete Blocks)
Effective Date
01-Jun-2007
Replaced By
ASTM D6638-11 - Standard Test Method for Determining Connection Strength Between Geosynthetic Reinforcement and Segmental Concrete Units (Modular Concrete Blocks)
Effective Date
01-Jun-2011

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ASTM D6638-07 - Standard Test Method for Determining Connection Strength Between Geosynthetic Reinforcement and Segmental Concrete Units (Modular Concrete Blocks)ASTM D6638-07 - Standard Test Method for Determining Connection Strength Between Geosynthetic Reinforcement and Segmental Concrete Units (Modular Concrete Blocks)
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ASTM D6638-07 - Standard Test Method for Determining Connection Strength Between Geosynthetic Reinforcement and Segmental Concrete Units (Modular Concrete Blocks)
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Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D6638–07
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 D4495 Test Method for Impact Resistance of Poly(Vinyl
Chloride) (PVC) Rigid Profiles by Means of a Falling
1.1 This test method is used to determine the connection
Weight
properties between a layer of geosynthetic reinforcement and
D6637 Test Method for Determining Tensile Properties of
segmental concrete block units used in construction of rein-
Geogrids by the Single or Multi-Rib Tensile Method
forced soil retaining walls. The test is carried out under
conditions determined by the user that reproduce the connec-
3. Terminology
tionsystematfull-scale.Theresultsofaseriesoftestsareused
3.1 Definitions:
to define a relationship between connection strength for a
3.1.1 displacement criteria, n—a user prescribed maximum
segmental unit-geosynthetic connection system and normal
movement, mm (in.), of the geosynthetic reinforcement out
load.
from the back of segmental concrete units.
1.2 This is a performance test used to determine properties
3.1.2 geosynthetic, n—a planar product manufactured from
for design of retaining wall systems utilizing segmental con-
polymeric material used with soil, rock, earth, or other geo-
crete units and soil reinforcing geosynthetics, either geotextiles
technical engineering related material as an integral part of a
or geogrids. The test is performed on a full-scale construction
man-made project, structure or system. (D4439)
of the connection and may be run in a laboratory or the field.
3.1.3 granular infill, n—coarse grained soil aggregate used
1.3 The values stated in SI units are regarded as the
to fill the voids in and between segmental concrete units.
standard. The values stated in inch-pound units are provided
3.1.4 peak connection strength, n—the maximum tensile
for information only.
capacity of the connection between geosynthetic reinforcement
1.4 This standard may involve hazardous materials, opera-
and segmental concrete units.
tions, and equipment. This standard does not purport to
3.1.5 segmental concrete unit (modular concrete block),
address all of the safety concerns, if any, associated with its
n—a concrete unit manufactured specifically for mortarless,
use. It is the responsibility of the user of this standard to
dry-stack retaining wall construction.
establish appropriate safety and health practices and deter-
3.1.6 segmental concrete unit width, n—the segmental con-
mine the applicability of regulatory limitations prior to use.
crete unit dimension parallel to the wall face and coincident
2. Referenced Documents with the geosynthetic reinforcement test specimen width.
2
3.1.7 service state connection strength, n— the connection
2.1 ASTM Standards:
tensile capacity at a service state displacement criterion be-
D448 Classification for Sizes of Aggregate for Road and
tween geosynthetic reinforcement and segmental concrete
Bridge Construction
units.
D4354 Practice for Sampling of Geosynthetics for Testing
3.2 For definition of other terms relating to geosynthetics,
D4439 Terminology for Geosynthetics
refer to Terminology D4439.
1
4. Summary of Test Method
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 One end of a wide geosynthetic reinforcement test
cal Properties
specimen is attached to dry stacked segmental concrete block
CurrenteditionapprovedJune1,2007.PublishedJuly2007.Originallyapproved
units assembled as specified by the user. The other end of the
in 2001. Last previous edition approved in 2006 as D6638 – 06. DOI: 10.1520/
D6638-07.
testspecimenisattachedtoaclamp,whichispartofaconstant
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
rate of extension tensile loading machine. The top course of
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
segmental concrete block units is then loaded vertically to a
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. constant normal load and the geosynthetic is then tensioned
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D6638–07
under constant rate of displacement until a sustained loss of
connection capacity and/or
...

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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.

  • Standard
    9 pages
    English language
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  • Standard
    9 pages
    English language
    sale 15% off