Standard Practice for Installation of Articulating Concrete Block (ACB) Revetment Systems

SIGNIFICANCE AND USE
This standard is intended for use by designers and contractors to assist in understanding the importance of proper installation of articulating concrete block revetment systems in order to achieve suitable hydraulic performance and maintain stability against the erosive force of flowing water.
An articulating concrete block system is comprised of a matrix of individual concrete blocks placed together to form an erosion-resistant overlay with specific hydraulic performance characteristics. The system includes a geotextile underlay compatible with the subsoil that allows hydraulic infiltration and exfiltration to occur while providing particle retention. The blocks within the matrix shall be dense and durable and the matrix shall be flexible and porous.
Articulating concrete block systems are used to provide erosion protection to underlying soil materials from the forces of flowing water. The term “articulating,” as used in this standard, implies the ability of individual blocks of the system to conform to changes in the subgrade while remaining interconnected by virtue of block interlock and/or additional system components such as cables, ropes, geotextiles, or geogrids.
The definition of articulating concrete block systems does not distinguish between interlocking and non-interlocking block geometries, between cable-tied and non-cable-tied systems, between vegetated and non-vegetated systems or between methods of manufacturing or placement. Furthermore, the definition does not restrict or limit the block size, shape, strength, or longevity; however, guidelines and recommendations regarding these factors are incorporated into this standard. This standard does not specify size restrictions for individual block units. Block systems are available in either open-cell or closed-cell varieties.
The installation of articulated concrete block systems shall be performed so as to maintain intimate contact between the blocks, the geotextile filter and the subgrade that ...
SCOPE
1.1 The purpose of this standard is to provide recommended guidelines for the proper installation of articulating concrete block (ACB) revetment systems.
1.2 This practice offers a set of instructions for performing one or more specific operations. This document cannot replace education or experience and should be used in conjunction with professional judgment. Not all aspects of this practice may be applicable in all circumstances. This ASTM standard is not intended to represent or replace standard of care by which adequacy of a given professional service must be judged, nor should this document be applied without considerations of a project's many unique aspects. The word "standard" in the title of this document means only that the document has been approved through the ASTM consensus process.
1.3 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.

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Historical
Publication Date
09-Mar-2003
Current Stage
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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:D6884–03
Standard Practice for
Installation of Articulating Concrete Block (ACB) Revetment
Systems
This standard is issued under the fixed designation D6884; 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 ropes, geotextiles, geogrids, or a combination thereof, and
typically include a geotextile underlayment for subsoil reten-
1.1 The purpose of this standard is to provide recommended
tion.
guidelines for the proper installation of articulating concrete
block (ACB) revetment systems.
4. Summary of Practice
1.2 This practice offers a set of instructions for performing
4.1 The proper installation of articulated concrete block
one or more specific operations. This document cannot replace
revetment systems is essential to the adequate functioning and
educationorexperienceandshouldbeusedinconjunctionwith
performance of the system during the design hydrologic event.
professional judgment. Not all aspects of this practice may be
This standard provides guidelines for maximizing the corre-
applicable in all circumstances. This ASTM standard is not
spondence between the design intent and the actual field-
intended to represent or replace standard of care by which
finished conditions of the project.
adequacy of a given professional service must be judged, nor
4.2 This standard addresses the preparation of the subgrade,
should this document be applied without considerations of a
geotextile placement, block system placement, backfilling and
project’s many unique aspects.The word “standard” in the title
finishing, and inspection.
of this document means only that the document has been
approved through the ASTM consensus process.
5. Significance and Use
1.3 This standard may involve hazardous materials, opera-
5.1 This standard is intended for use by designers and
tions, and equipment. This standard does not purport to
contractors to assist in understanding the importance of proper
address all of the safety concerns, if any, associated with its
installation of articulating concrete block revetment systems in
use. It is the responsibility of the user of this standard to
order to achieve suitable hydraulic performance and maintain
establish appropriate safety and health practices and deter-
stability against the erosive force of flowing water.
mine the applicability of regulatory limitations prior to use.
5.2 An articulating concrete block system is comprised of a
matrix of individual concrete blocks placed together to form an
2. Referenced Documents
2 erosion-resistant overlay with specific hydraulic performance
2.1 ASTM Standards:
3 characteristics. The system includes a geotextile underlay
C33 Specification for Concrete Aggregates
compatible with the subsoil that allows hydraulic infiltration
C698 Test Methods for Chemical, Mass Spectrometric, and
and exfiltration to occur while providing particle retention.The
SpectrochemicalAnalysis of Nuclear-Grade Mixed Oxides
blocks within the matrix shall be dense and durable and the
((U, Pu)O )
matrix shall be flexible and porous.
3. Terminology 5.3 Articulating concrete block systems are used to provide
erosion protection to underlying soil materials from the forces
3.1 Definitions:
of flowing water. The term “articulating,” as used in this
3.1.1 articulating concrete block (ACB) revetment system,
standard, implies the ability of individual blocks of the system
n—a matrix of interconnected concrete block units for erosion
to conform to changes in the subgrade while remaining
protection. Units are connected by geometric interlock, cables,
interconnected by virtue of block interlock and/or additional
system components such as cables, ropes, geotextiles, or
geogrids.
This practice is under the jurisdiction of ASTM Committee D18 on Soil and
5.4 The definition of articulating concrete block systems
Rock and is the direct responsibility of Subcommittee D18.25 on Erosion and
Sediment Control Technology.
does not distinguish between interlocking and non-interlocking
Current edition approved March 10, 2003. Published May 2003. DOI: 10.1520/
block geometries, between cable-tied and non-cable-tied sys-
D6884-03.
tems, between vegetated and non-vegetated systems or be-
Annual Book of ASTM Standards, Vol 04.02.
Annual Book of ASTM Standards, Vol 12.01. tween methods of manufacturing or placement. Furthermore,
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6884–03
the definition does not restrict or limit the block size, shape, 6.2 Placement of Geotextile:
strength, or longevity; however, guidelines and recommenda-
6.2.1 Immediately prior to placing the geotextile and ACB
tions regarding these factors are incorporated into this stan-
system, the prepared subgrade shall be inspected. The geotex-
dard. This standard does not specify size restrictions for
tile shall be placed directly on the prepared area, in intimate
individual block units. Block systems are available in either
contact with the subgrade and free of folds or wrinkles. The
open-cell or closed-cell varieties.
geotextile shall be placed in such a manner that placement of
5.5 The installation of articulated concrete block systems
the overlying materials will not excessively stretch or tear the
shall be performed so as to maintain intimate contact between
geotextile. After geotextile placement, the work area shall not
theblocks,thegeotextilefilterandthesubgradethatthesystem
bedisturbedsoastoresultinalossofintimatecontactbetween
is intended to protect.
the concrete block, the geotextile, and the subgrade. The
geotextile shall not be left exposed longer than the manufac-
6. Procedure
turer’s recommendation to minimize potential damage due to
6.1 Subgrade Preparation:
ultraviolet radiation.
6.1.1 Stable and compacted subgrade soil shall be prepared
6.2.2 The geotextile shall be placed so that upstream strips
to the lines, grades and cross sections shown on the contract
overlap downstream strips and so that upslope strips overlap
drawings.Termination trenches and transitions between slopes,
downslope strips. Overlaps shall be in the direction of flow
embankment crests, benches, berms and toes shall be com-
wherever possible. The longitudinal and transverse joints shall
pacted, shaped and uniformly graded to facilitate the develop-
beoverlappedatleast3ft(91cm)forbelow-waterinstallations
ment of intimate contact between the ACB system and the
and at least 1.5 ft (46 cm) for dry installations. If a sewn seam
underlying grade. Termination between the articulating con-
is to be used for the seaming of the geotextile, the thread to be
crete block revetment system and a concrete slab, wall or
used shall consist of high strength polypropylene or polyester
similar structure, shall be secured in a manner which prevents
and shall be resistant to ultraviolet radiation. The geotextile
soil migration.
shall extend beyond the top, toe and side termination points of
6.1.2 The subgrade soil conditions shall meet or exceed the
the revetment. If necessary to expedite construction and to
required material properties described in 6.1.4
...

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