ASTM D8364/D8364M-21

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:D8364/D8364M −21
Standard Specification for
Geosynthetic Cementitious Composite Mat (GCCM)
Materials
This standard is issued under the fixed designation D8364/D8364M; 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 D4759 Practice for Determining the Specification Confor-
mance of Geosynthetics
1.1 This specification covers the requirements and proper-
D4885 Test Method for Determining Performance Strength
ties for geosynthetic cementitious composite mat materials, or
of Geomembranes by the Wide Strip Tensile Method
GCCM materials, in various applications. The applications
D5199 Test Method for Measuring the Nominal Thickness
where GCCM materials are utilized shall have different re-
of Geosynthetics
quired physical properties, which this standard describes.
D5494 Test Method for the Determination of Pyramid Punc-
1.2 The values stated in either SI units or inch-pound units
ture Resistance of Unprotected and Protected Geomem-
are to be regarded separately as standard. The values stated in
branes
each system may not be exact equivalents; therefore, each
D5641/D5641M Practice for Geomembrane Seam Evalua-
system shall be used independently of the other. Combining
tion by Vacuum Chamber
values from the two systems may result in nonconformance
D5820 Practice for Pressurized Air Channel Evaluation of
with the standard.
Dual-Seamed Geomembranes
1.3 This standard does not purport to address all of the D5993 Test Method for Measuring Mass per Unit Area of
safety concerns, if any, associated with its use. It is the
Geosynthetic Clay Liners
responsibility of the user of this standard to establish appro- D6768/D6768M Test Method for Tensile Strength of Geo-
priate safety, health, and environmental practices and deter-
synthetic Clay Liners
mine the applicability of regulatory limitations prior to use. D7177/D7177M Specification forAir Channel Evaluation of
1.4 This international standard was developed in accor-
Polyvinyl Chloride (PVC) Dual Track Seamed Geomem-
dance with internationally recognized principles on standard- branes
ization established in the Decision on Principles for the
D8030/D8030M Practice for Sample Preparation for GCCM
Development of International Standards, Guides and Recom-
D8058 Test Method for Determining the Flexural Strength
mendations issued by the World Trade Organization Technical of a Geosynthetic Cementitious Composite Mat (GCCM)
Barriers to Trade (TBT) Committee.
Using the Three-Point Bending Test
D8173 Guide for Site Preparation, Layout, Installation, and
2. Referenced Documents
Hydration of Geosynthetic Cementitious Composite Mats
D8329 Test Method for Determination of Water/
2.1 ASTM Standards:
Cementitious Materials Ratio for Geosynthetic Cementi-
C1185 Test Methods for Sampling and Testing Non-
tious Composite Mats (GCCMs) and Measurement of the
Asbestos Fiber-Cement Flat Sheet, Roofing and Siding
Compression Strength of the Cementitious Material Con-
Shingles, and Clapboards
tained Within
C1353/C1353M Test Method for Abrasion Resistance of
Dimension Stone Subjected to FootTraffic Using a Rotary
Platform Abraser 3. Terminology
D4439 Terminology for Geosynthetics
3.1 Definitions—For definitions of terms related to
geosynthetics, refer to Terminology D4439.
This specification is under the jurisdiction of ASTM Committee D35 on
3.2 Definitions of Terms Specific to This Standard:
Geosynthetics and is the direct responsibility of Subcommittee D35.06 on Geosyn-
3.2.1 cured, adj—a description of the state of a GCCM or
thetic Specifications.
cementitious mixture after hydration for a specific period of
Current edition approved Feb. 15, 2021. Published March 2021. DOI: 10.1520/
D8364_D8364M-21.
timeandquantityofwaterunderspecifiedconditions,followed
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
by a period of time when the GCCM is kept under a specified
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
environmental condition during which the cementitious mate-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. rial continues to cure and develop compressive strength.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
D8364/D8364M−21
3.2.2 uncured, adj—a description of the state of a GCCM or shall be required to limit movement of the GCCM under wind
cementitious mixture prior to hydration. or hydraulic loading conditions or when the recommended
slope angle or length is exceeded.
4. Classification of GCCM Materials in Applications
4.2.2 Type II GCCM applications would include all Type I
4.1 Prefabricated geosynthetic cementitious composite mats applications, and applications that would have abrasion and
(GCCMs) covered by this specification shall be classified as wearrequirementsgreaterthanTypeI,willbeexposedtoshear
2 2
Type I, Type II, and Type III. Distinctions between the types is stresses greater than 50 kg⁄m [10 lb/ft ] and flow velocities
related to the requirements found in Table 1. Typically, higher
greater than 6 m/s [20 ft/s], or will be subject to design
grade types would be expected to be durable and longer lasting requirements for impact loads, or have medium dense sub-
than lower grade types in the same application.
grades. Erosion protection and weed suppression applications
of Type II GCCMs include but are not limited to: channel
4.2 Typical Applications By Classification Type:
lining, berm protection, armoring, slope protection (any angle
4.2.1 Type I GCCM applications have minimal require-
and run length), culvert invert lining and concrete overlay, and
ments for abrasion and wear; will be exposed to shear stresses
2 2 remediation of concrete hydraulic structures. Installations of
of less than 50 kg/m [10 lb/ft ] and lower flow velocities up to
Type II GCCM applications shall require all the same securing
6 m/s [20 ft/s]; will not be subjected to impact loads, wave
mechanisms as outlined for Type I GCCM installations.
action, water over topping or similar forces; and are installed
4.2.3 Type III GCCM applications would include all Type I
above a dense subgrade capable of supporting them, such as
and Type II applications that require additional flexural
concrete or rock. Applications include but are not limited to:
strength of the GCCM material due to unsuitable (that is,
erosion control, weed suppression, slope protection, berm
loose) subgrades. The same securing mechanisms as outlined
protection, and remediation of concrete hydraulic structures.
for Type I or Type II GCCM installations may be required.
Slope protection applications of Type I GCCMs shall be
4.2.4 A special category of Type I, Type II, and Type III
limited to slopes of grades lower than 3:1 with slope lengths of
GCCM applications is armoring of containment structures.The
less than 50 ft; extensions of this limit are permissible only
containment GCCM systems must meet the requirements for
with the use of suitable intermediate fixings such as percussion
field seam testing as outlined in Practice D5641/D5641M or
anchors. Installations for Type I GCCM applications shall
D5820, Specification D7177/D7177M, or similar.
include perimeter fixings to all unjointed edges (leading,
4.2.5 It is incumbent upon the designer to ensure that the
trailing, toe, and crest) such as anchor trenches, or fixed
proper GCCM type is specified for the bearing capacity of the
mechanically and sealed in such a way that liquid, wind, or
subgrade and the application.
both cannot ingress. Intermediate fixings such as metal pegs,
earth percussion anchors, mechanical fixings, or check slots 4.2.6 Installation requirements are detailed in Guide D8173.
TABLE 1 Classifications for GCCMs
Minimum Values Unless Specified
Property Test Method State of GCCM
Type I Type II Type III
Thickness uncured
D5199 4.5 mm [0.17 in.] 7.0 mm [0.27 in.]
cured 24 h
A 2 2 2 2
Mass per unit area D5993 uncured 6.5 kg/m [1.33 lb/ft ] 10.5 kg/m [2.15 lb/ft ]
3 3
Density D5993/D5199 uncured 1250 kg/m [78 lb/ft ]
B
Flexural strength Initial breaking load 625 N/m [3.5 lbf/in.] 1500 N/m [8.5 lbf/in.] 3750 N/m [21 lbf/in.]
Initial flexural strength D8058 cured 24 h 3.5 MPa [500 psi]
Final flexural strength 4.0 MPa [580 psi]
Compressive strength of cementitious mix D8329 cured 28 days 40 MPa [5800 psi] 50 MPa [7200 psi] 60 MPa
...