ASTM C1550-03a

Standard Test Method for Flexural Toughness of Fiber Reinforced Concrete (Using Centrally Loaded Round Panel)

SCOPE
1.1 This test method covers the determination of flexural toughness of fiber-reinforced concrete expressed as energy absorption in the post-crack range using a round panel supported on three symmetrically arranged pivots and subjected to a central point load. The performance of specimens tested by this method is quantified in terms of the energy absorbed between the onset of loading and selected values of central deflection.
1.2 This test method provides for the scaling of results whenever specimens do not comply with the target thickness and diameter, as long as dimensions do not fall outside of give limits.
1.3 The values stated in SI units are to be regarded as the standard.
1.4  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

• Status: Historical
• Publication Date: 09-Jun-2003
• ICS: 91.100.40 - Products in fibre-reinforced cement
• Technical Committee: C09 - Concrete and Concrete Aggregates
• Drafting Committee: C09.42 - Fiber-Reinforced Concrete

Relations

• Replaces: ASTM C1550-03 - Standard Test Method for Flexural Toughness of Fiber Reinforced Concrete (Using Centrally Loaded Round Panel)
• Effective Date: 10-Jun-2003
• Replaced By: ASTM C1550-04 - Standard Test Method for Flexural Toughness of Fiber Reinforced Concrete (Using Centrally Loaded Round Panel)
• Effective Date: 01-Nov-2004
• Referred By: ASTM C1116/C1116M-23 - Standard Specification for Fiber-Reinforced Concrete
• Effective Date: 10-Jun-2003

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C 1550 – 03a
Standard Test Method for
Flexural Toughness of Fiber Reinforced Concrete (Using
1
Centrally Loaded Round Panel)
This standard is issued under the fixed designation C 1550; 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* that excludes extraneous deformations of the load train and
local crushing of the panel at the point of load application and
1.1 This test method covers the determination of flexural
points of support.
toughness of fiber-reinforced concrete expressed as energy
3.2.2 compliance—a measure of the tendency of a structure
absorption in the post-crack range using a round panel sup-
to deflect under load, found as the inverse of stiffness or
ported on three symmetrically arranged pivots and subjected to
deflection divided by the corresponding load.
a central point load. The performance of specimens tested by
3.2.3 load train—those parts of a testing machine that
this method is quantified in terms of the energy absorbed
experience load and undergo straining during a mechanical
between the onset of loading and selected values of central
test, including the actuator, frame, support fixtures, load cell,
deflection.
and specimen.
1.2 This test method provides for the scaling of results
3.2.4 toughness—the energy absorbed by the specimen
whenever specimens do not comply with the target thickness
equivalent to the area under the load-deflection curve between
anddiameter,aslongasdimensionsdonotfalloutsideofgiven
the onset of loading and a specified central deflection.
limits.
1.3 The values stated in SI units are to be regarded as the
4. Summary of Test Method
standard.
4.1 Moldedroundpanelsofcastfiber-reinforcedconcreteor
1.4 This standard does not purport to address all of the
fiber-reinforced shotcrete are subjected to a central point load
safety concerns, if any, associated with its use. It is the
while supported on three symmetrically arranged pivots. The
responsibility of the user of this standard to establish appro-
load is applied through a hemispherical-ended steel piston
priate safety and health practices and determine the applica-
advanced at a prescribed rate of displacement. Load and
bility of regulatory limitations prior to use.
deflection are recorded simultaneously up to a specified central
2. Referenced Documents deflection. The energy absorbed by the panel up to a specified
central deflection is representative of the flexural toughness of
2.1 ASTM Standards:
the fiber-reinforced concrete panel.
C 125 Terminology Relating to Concrete and Concrete
2
Aggregates
5. Significance and Use
C 670 Practice for Preparing Precision and Bias Statements
2 5.1 The post-crack behavior of plate-like, fiber-reinforced
for Test Methods for Construction Materials
concrete structural members is well represented by a centrally
3. Terminology loaded round panel test specimen that is simply supported on
three pivots symmetrically arranged around its circumference.
3.1 Definitions—For definitions of terms used in this test
Such a test panel experiences bi-axial bending in response to a
method, refer to Terminology C 125.
central point load and exhibits a mode of failure related to the
3.2 Definitions of Terms Specific to This Standard:
in situ behavior of structures such as concrete slabs-on-grade,
3.2.1 central deflection—the net deflection at the center of
shotcrete tunnel linings, and shotcrete embankment stabiliza-
the panel measured relative to a plane defined by the three
tion linings. The post-crack performance of round panels
pivotsusedtosupportthepanel;thisisaconditioneddeflection
subject to a central point load can be represented by the energy
absorbed by the panel up to a specified central deflection. In
this test method, the energy absorbed up to a specified central
1
This test method is under the jurisdiction of ASTM Committee C09 on
deflection is taken to represent the ability of a fiber-reinforced
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
C09.42 on Fiber-Reinforced Concrete. concrete to redistribute stress following cracking.
Current edition approved June 10, 2003. Published August 2003. Originally
NOTE 1—The use of three pivoted point supports in the test configura-
approved in 2002. Last previous edition approved in 2003 as C 1550-03.
2
Annual Book of ASTM Standards, Vol 04.02. tion results in determinate out-of-plane reactions prior to cracking,
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

----------------
...