ASTM D8058-17
(Test Method)Standard Test Method for Determining the Flexural Strength of a Geosynthetic Cementitious Composite Mat (GCCM) Using the Three-Point Bending Test
Standard Test Method for Determining the Flexural Strength of a Geosynthetic Cementitious Composite Mat (GCCM) Using the Three-Point Bending Test
SIGNIFICANCE AND USE
5.1 This test method is applicable for testing geosynthetic cementitious composite mats in a cured state. It is used with a constant rate of extension-type tension apparatus.
5.2 This test is an index test that may be used for manufacturing quality control (MQC). This test is appropriate for characterizing the flexural properties of a GCCM.
SCOPE
1.1 This test method provides guidelines for testing the flexural strength of cured geosynthetic cementitious composite mat (GCCM) products in a three (3)-point bend apparatus.
1.2 The values in SI units are to be regarded as the standard. Values in inch-pound units are in parentheses for information.
1.3 This standard may involve hazardous operations, equipment, and climates. 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.
1.4 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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Standards Content (Sample)
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Designation: D8058 − 17
Standard Test Method for
Determining the Flexural Strength of a Geosynthetic
Cementitious Composite Mat (GCCM) Using the Three-Point
1
Bending Test
This standard is issued under the fixed designation D8058; 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 3.2 Definitions:
3.2.1 cured, adj—a description of the state of a GCCM after
1.1 This test method provides guidelines for testing the
hydration for a specified period of time and quantity of water
flexural strength of cured geosynthetic cementitious composite
when known under specified conditions, followed by a period
mat (GCCM) products in a three (3)-point bend apparatus.
of time where the GCCM is kept under a specified environ-
1.2 The values in SI units are to be regarded as the standard.
mental condition during which the cementitious material con-
Values in inch-pound units are in parentheses for information.
tinues to cure and develop compressive strength.
1.3 This standard may involve hazardous operations,
3.2.2 curing time, n—the time subsequent to initial hydra-
equipment, and climates. This standard does not purport to
tion of the GCCM and immediately prior to the testing of the
address all of the safety concerns, if any, associated with its
material, during which the cementitious material is allowed to
use. It is the responsibility of the user of this standard to
harden and form its final strength using the specific process for
establish appropriate safety and health practices and deter-
curing as specified in 8.3.
mine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accor-
3.2.3 dry, adj—a description of the state of a GCCM before
dance with internationally recognized principles on standard-
it has been exposed to a hydration source and typically
ization established in the Decision on Principles for the
describes the “as-received” dry product after conditioning in a
Development of International Standards, Guides and Recom-
prescribed manner.
mendations issued by the World Trade Organization Technical
3.2.4 final breaking load, n—the maximum load achieved
Barriers to Trade (TBT) Committee.
prior to rupture of materials.
2. Referenced Documents
3.2.5 final deflection—the deflection of the specimen from
2
2.1 ASTM Standards:
its initial position (before testing begins) measured at mid span
D76/D76M Specification for Tensile Testing Machines for
at the final breaking load.
Textiles
3.2.6 final flexural strength, n—the final flexural strength,
D4354 Practice for Sampling of Geosynthetics and Rolled
expressed in megapascals (pound-force per square inch), is
Erosion Control Products (RECPs) for Testing
calculated from the final breaking load of a hydrated and cured
D4439 Terminology for Geosynthetics
GCCM specimen, oriented in either the machine or cross-
D8030/D8030M Practice for Sample Preparation for GCCM
machine direction, loaded as simple beams, when breaks occur
3. Terminology perpendicular to the specimen length, with the load applied at
the center, in a three-point loading fixture.
3.1 For definitions of common technical terms used in this
standard, refer to Terminology D4439.
3.2.7 geosynthetic cementitious composite mat (GCCM),
n—a factory-assembled geosynthetic composite consisting of a
cementitious layer contained within a layer or layers of
1
This test method is under the jurisdiction of ASTM Committee D35 on
geosynthetic materials that becomes hardened when hydrated.
Geosynthetics and is the direct responsibility of Subcommittee D35.05 on Geosyn-
thetic Erosion Control.
3.2.8 hydration, n—exposure of the GCCM, in this case, to
Current edition approved July 1, 2017. Published July 2017. Originally approved
water in prescribed conditions for a prescribed time and water
in 2017. DOI: 10.1520/D8058-17.
2
quantity when known.
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
3.2.9 initial breaking load, n—the maximum load at which
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. the first crack in the cementitious matrix of the GCCM forms.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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D8058 − 17
3.2.10 initial deflection, n—the deflection of the specimen cannot exert longitudinal or vertical constraints (rocker-type
from its initial position (before testing begins) measured at mid bearing edges, ro
...
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