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ASTM C947-99

(Test Method)

Standard Test Method for Flexural Properties of Thin-Section Glass-Fiber-Reinforced Concrete (Using Simple Beam With Third-Point Loading)

Standard Test Method for Flexural Properties of Thin-Section Glass-Fiber-Reinforced Concrete (Using Simple Beam With Third-Point Loading)

SCOPE
1.1 This test method covers determination of the modulus of rupture in bending and the flexural proportional elastic limit of glass-fiber reinforced concrete sections by the use of a simple beam of 1.0 in. (25.4 mm) or less in depth using third-point loading.

General Information

Status
Historical
Publication Date
09-Jan-1999
ICS
91.100.30 - Concrete and concrete products
Technical Committee
C27 - Precast Concrete Products
Drafting Committee
C27.40 - Glass Fiber Reinforced Concrete
Current Stage
Ref Project

Relations

Replaced By
ASTM C947-03 - Standard Test Method for Flexural Properties of Thin-Section Glass-Fiber-Reinforced Concrete (Using Simple Beam With Third-Point Loading)
Effective Date
10-Jun-2003
Referred By
ASTM C1560-03(2023) - Standard Test Method for Hot Water Accelerated Aging of Glass-Fiber Reinforced Cement-Based Composites
Effective Date
10-Jan-1999
Referred By
ASTM C1228-96(2023) - Standard Practice for Preparing Coupons for Flexural and Washout Tests on Glass Fiber Reinforced Concrete
Effective Date
10-Jan-1999
Referred By
ASTM C1355/C1355M-96(2020) - Standard Specification for Glass Fiber Reinforced Gypsum Composites
Effective Date
10-Jan-1999

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ASTM C947-99 - Standard Test Method for Flexural Properties of Thin-Section Glass-Fiber-Reinforced Concrete (Using Simple Beam With Third-Point Loading)ASTM C947-99 - Standard Test Method for Flexural Properties of Thin-Section Glass-Fiber-Reinforced Concrete (Using Simple Beam With Third-Point Loading)
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ASTM C947-99 - Standard Test Method for Flexural Properties of Thin-Section Glass-Fiber-Reinforced Concrete (Using Simple Beam With Third-Point Loading)
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Standards Content (Sample)


NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 947 – 99
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Test Method for
Flexural Properties of Thin-Section Glass-Fiber-Reinforced
Concrete (Using Simple Beam With Third-Point Loading)
This standard is issued under the fixed designation C 947; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope testing machine shall be such that the total elastic deformation
of the system does not exceed 1.0 % of the total deflection of
1.1 This test method covers determination of the flexural
the test specimen during the test, or appropriate corrections
ultimate strength in bending and the yield strength of glass-
shall be made. The force-indicating mechanism shall be
fiber reinforced concrete sections by the use of a simple beam
essentially free of inertial lag at the crosshead rate used. The
of 1.0 in. (25.4 mm) or less in depth using third-point loading.
accuracy of the testing machine shall be verified in accordance
1.2 The values stated in inch-pound units are to be regarded
with Practices E 4 and Specification D 76.
as the standard. The values given in parentheses are for
4.2 Loading Noses and Supports—The loading noses and
information only.
supports shall have cylindrical surfaces. In order to avoid
1.3 This standard does not purport to address all of the
excessive indentation or failure due to stress concentration
safety concerns, if any, associated with its use. It is the
directly under the loading noses or supports, the radius of the
responsibility of the user of this standard to establish appro-
noses and supports shall be at least 0.25 in. (6.35 mm). See Fig.
priate safety and health practices and determine the applica-
1 for loading configuration. The arc of the loading noses and
bility of regulatory limitations prior to use.
supports, in contact with the specimen, shall be sufficiently
2. Referenced Documents
large to prevent contact of the specimen with the sides of the
noses.
2.1 ASTM Standards:
4.3 Loading Head and Support Apparatus—Loading noses,
C 1228 Practice for Flexural and Washout Tests on Glass
supports, and their respective holding devices shall be designed
Fiber Reinforced Concrete
to allow rotation to occur about axes that lie in horizontal
D 76 Specification for Tensile Testing Machines for Tex-
planes of the loading apparatus as shown in Fig. 1. This
tiles
configuration of loading head and support apparatus will
E 4 Practices for Force Verification of Testing Machines
ensure that forces applied to the specimen will be initially
3. Significance and Use
perpendicular to the surfaces of the specimen and applied
without eccentricity.
3.1 Flexural properties determined by this test method are
4.4 Specimen Depth and Width Measuring Device—A cali-
useful for quality control of glass-fiber reinforced concrete
per or micrometer or other suitable device that is able to
products, ascertaining compliance with the governing specifi-
measure sample depth accurate to 0.005 in. (0.13 mm) and
cations, research and development, and generating data for use
width accurate to 0.01 in. (0.25 mm).
in product design.
5. Sampling
4. Apparatus
5.1 Test boards shall be manufactured in accordance with
4.1 Testing Machine—A properly calibrated testing ma-
governing specifications.
chine that can be operated at constant rates of crosshead motion
and in which the error in the force measuring system shall not
6. Test Specimen
exceed 61.0 % of the maximum force expected to be measured
6.1 Six test specimens shall be prepared in accordance with
shall be used. The testing machine shall be equipped with a
Practice C 1228.
deflection measuring and recording device. The stiffness of the
6.2 The test specimen shall have a ratio of the specimen
major span length to the specimen depth between 16 to 1 and
This test method is under the jurisdiction of ASTM Committee C-27 on Precast
30 to 1. The total specimen length shall be a minimum of 1 in.
Concrete Products and is the direct responsibility of Subcommittee C27.40 on Glass
(25 mm) longer than the specimen’s major span. Nominal
Fiber Reinforced Concrete Made by the Spray-Up Process.
Current edition approved Jan. 10, 1999. Published June 1999. Originally
specimen width shall be 2 in. (50 mm).
published as C 947-81. Last previous edition C 947-97.
Annual Book of ASTM Standards, Vol 04.05.
7. Conditioning
Annual Book of ASTM Standards, Vol 07.01.
7.1 The sample or specimens shall be transported to the
Annual Book of ASTM Standards, Vol 03.01.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C 947
FIG. 2 Force Deflection Chart
deflection curve reaches its point of deviation from linearity (P in Fig. 2)
y
to conserve chart paper.
8.7 Record the maximum force attained ( P ) and the force
u
where the force-deflection curve devia
...

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