ASTM D6916-06c(2011)
(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
The shear strength between segmental concrete units (with and without geosynthetic reinforcement) and is used in design of reinforced soil retaining walls.
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, bi-linear, or some other complex mathematical expression.
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.
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.
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
Relations
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: D6916 − 06c (Reapproved 2011)
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 D6637 Test Method for Determining Tensile Properties of
Geogrids by the Single or Multi-Rib Tensile Method
1.1 This test method is used to determine the shear strength
between two layers of segmental concrete block units used in
3. Terminology
construction of reinforced soil retaining walls. The test is
3.1 Definitions:
carried out under conditions determined by the user that
3.1.1 displacement criteria, n—a user prescribed maximum
reproducethefacingsystematfull-scale.Theresultsofaseries
movement, mm (in.), of the top segmental concrete unit out
of tests are used to define a relationship between shear strength
from the back of lower segmental concrete units.
developed between segmental concrete units and normal load.
3.1.2 geosynthetic, n—a planar product manufactured from
1.2 This is a performance test used to determine properties
polymeric material used with soil, rock, earth, or other geo-
for design of retaining wall systems utilizing segmental con-
technical engineering related material as an integral part of a
crete units and soil reinforcing geosynthetics, either geotextiles
man-made project, structure or system. D4439
or geogrids. The test is performed on a full-scale construction
3.1.3 granular infill, n—coarse grained soil aggregate used
ofthefacingsystemandmayberuninalaboratoryorthefield.
to fill the voids in and between segmental concrete units.
1.3 The values stated in SI units are regarded as the
3.1.4 peak shear strength, n—the maximum shear capacity
standard. The values stated in inch-pound units are provided
between segmental concrete units.
for information only.
3.1.5 segmental concrete depth, n—the segmental concrete
1.4 This standard may involve hazardous materials,
unit dimension perpendicular to the wall face.
operations, and equipment. This standard does not purport to
3.1.6 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-
3.1.7 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.
2. Referenced Documents
3.2 For definition of other terms relating to geosynthetics,
2
2.1 ASTM Standards: refer to Terminology D4439.
D448 Classification for Sizes of Aggregate for Road and
4. Summary of Test Method
Bridge Construction
4.1 In this test method, segmental concrete units are as-
D4354 Practice for Sampling of Geosynthetics and Rolled
sembled in two rows (layers). The bottom row is laterally
Erosion Control Products(RECPs) for Testing
restrained. The top row is loaded vertically to a constant
D4439 Terminology for Geosynthetics
surcharge load and the interface is sheared at a constant rate of
D4595 Test Method for Tensile Properties of Geotextiles by
displacement until a drop of load after the peak load occurs.
the Wide-Width Strip Method
The test may be run with the geosynthetic reinforcement
sandwiched between the two rows of segmental concrete units
1
This test method is under the jurisdiction of ASTM Committee D35 on
to determine the shear strength between segmental concrete
Geosynthetics and is the direct responsibility of Subcommittee D35.01 on Mechani-
units at the connection between the units and the geosynthetic
cal Properties.
reinforcement.
Current edition approved Oct. 1, 2011. Published October 2011. Originally
approved in 2003. Last previous edition approved in 2006 as D6916–06c. DOI:
5. Significance and Use
10.1520/D6916-06CR11.
2
For referenced ASTM standards, visit the ASTM Web Site, www.astm.org. or
5.1 The shear strength between segmental concrete units
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
(with and without geosynthetic reinforcement) and is used in
Standards volume information, refer to the standard’s Document Summary page on
the ASTM web site. design of reinforced soil retaining walls.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
D6916 − 06c (2011)
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.