ASTM C1550-04
(Test Method)Standard Test Method for Flexural Toughness of Fiber Reinforced Concrete (Using Centrally Loaded Round Panel)
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
Relations
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 – 04
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* pivotsusedtosupportthepanel;thisisaconditioneddeflection
that excludes extraneous deformations of the load train and
1.1 This test method covers the determination of flexural
local crushing of the panel at the point of load application and
toughness of fiber-reinforced concrete expressed as energy
points of support.
absorption in the post-crack range using a round panel sup-
3.2.2 compliance—a measure of the tendency of a structure
ported on three symmetrically arranged pivots and subjected to
to deflect under load, found as the inverse of stiffness or
a central point load. The performance of specimens tested by
deflection divided by the corresponding load.
this method is quantified in terms of the energy absorbed
3.2.3 load train—those parts of a testing machine that
between the onset of loading and selected values of central
experience load and undergo straining during a mechanical
deflection.
test, including the actuator, frame, support fixtures, load cell,
1.2 This test method provides for the scaling of results
and specimen.
whenever specimens do not comply with the target thickness
3.2.4 toughness—the energy absorbed by the specimen
anddiameter,aslongasdimensionsdonotfalloutsideofgiven
equivalent to the area under the load-deflection curve between
limits.
the onset of loading and a specified central deflection.
1.3 The values stated in SI units are to be regarded as the
standard.
4. Summary of Test Method
1.4 This standard does not purport to address all of the
4.1 Moldedroundpanelsofcastfiber-reinforcedconcreteor
safety concerns, if any, associated with its use. It is the
fiber-reinforced shotcrete are subjected to a central point load
responsibility of the user of this standard to establish appro-
while supported on three symmetrically arranged pivots. The
priate safety and health practices and determine the applica-
load is applied through a hemispherical-ended steel piston
bility of regulatory limitations prior to use.
advanced at a prescribed rate of displacement. Load and
2. Referenced Documents deflection are recorded simultaneously up to a specified central
2
deflection. The energy absorbed by the panel up to a specified
2.1 ASTM Standards:
central deflection is representative of the flexural toughness of
C 125 Terminology Relating to Concrete and Concrete
the fiber-reinforced concrete panel.
Aggregates
C 670 Practice for Preparing Precision and Bias Statements
5. Significance and Use
for Test Methods for Construction Materials
5.1 The post-crack behavior of plate-like, fiber-reinforced
3. Terminology concrete structural members is well represented by a centrally
loaded round panel test specimen that is simply supported on
3.1 Definitions—For definitions of terms used in this test
three pivots symmetrically arranged around its circumference.
method, refer to Terminology C 125.
Such a test panel experiences bi-axial bending in response to a
3.2 Definitions of Terms Specific to This Standard:
central point load and exhibits a mode of failure related to the
3.2.1 central deflection—the net deflection at the center of
in situ behavior of structures such as concrete slabs-on-grade,
the panel measured relative to a plane defined by the three
shotcrete tunnel linings, and shotcrete embankment stabiliza-
tion linings. The post-crack performance of round panels
1
This test method is under the jurisdiction of ASTM Committee C09 on
subject to a central point load can be represented by the energy
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
absorbed by the panel up to a specified central deflection. In
C09.42 on Fiber-Reinforced Concrete.
this test method, the energy absorbed up to a specified central
Current edition approved Nov. 1, 2004. Published November 2004. Originally
approved in 2002. Last previous edition approved in 2004 as C 1550-04.
deflection is taken to represent the ability of a fiber-reinforced
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
concrete to redistribute stress following cracking.
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Cons
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.