ASTM C1550-05
(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 given 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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 – 05
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* 3.2 Definitions of Terms Specific to This Standard:
3.2.1 central deflection—the net deflection at the center of
1.1 This test method covers the determination of flexural
the panel measured relative to a plane defined by the three
toughness of fiber-reinforced concrete expressed as energy
pivotsusedtosupportthepanel;thisisaconditioneddeflection
absorption in the post-crack range using a round panel sup-
that excludes extraneous deformations of the load train and
ported on three symmetrically arranged pivots and subjected to
local crushing of the panel at the point of load application and
a central point load. The performance of specimens tested by
points of support.
this method is quantified in terms of the energy absorbed
3.2.2 compliance—a measure of the tendency of a structure
between the onset of loading and selected values of central
to deflect under load, found as the inverse of stiffness or
deflection.
deflection divided by the corresponding load.
1.2 This test method provides for the scaling of results
3.2.3 load train—those parts of a testing machine that
whenever specimens do not comply with the target thickness
experience load and undergo straining during a mechanical
anddiameter,aslongasdimensionsdonotfalloutsideofgiven
test, including the actuator, frame, support fixtures, load cell,
limits.
and specimen.
1.3 The values stated in SI units are to be regarded as the
3.2.4 toughness—the energy absorbed by the specimen
standard.
equivalent to the area under the load-deflection curve between
1.4 This standard does not purport to address all of the
the onset of loading and a specified central deflection.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
4. Summary of Test Method
priate safety and health practices and determine the applica-
4.1 Moldedroundpanelsofcastfiber-reinforcedconcreteor
bility of regulatory limitations prior to use.
fiber-reinforced shotcrete are subjected to a central point load
2. Referenced Documents while supported on three symmetrically arranged pivots. The
2
load is applied through a hemispherical-ended steel piston
2.1 ASTM Standards:
advanced at a prescribed rate of displacement. Load and
C 31/C 31M Practice for Making and Curing Concrete Test
deflection are recorded simultaneously up to a specified central
Specimens in the Field
deflection. The energy absorbed by the panel up to a specified
C 125 Terminology Relating to Concrete and Concrete
central deflection is representative of the flexural toughness of
Aggregates
the fiber-reinforced concrete panel.
C 670 Practice for Preparing Precision and Bias Statements
for Test Methods for Construction Materials
5. Significance and Use
3. Terminology 5.1 The post-crack behavior of plate-like, fiber-reinforced
concrete structural members is well represented by a centrally
3.1 Definitions—For definitions of terms used in this test
loaded round panel test specimen that is simply supported on
method, refer to Terminology C 125.
three pivots symmetrically arranged around its circumference.
Such a test panel experiences bi-axial bending in response to a
1
This test method is under the jurisdiction of ASTM Committee C09 on
central point load and exhibits a mode of failure related to the
Concrete and ConcreteAggregates and is the direct responsibility of Subcommittee
in situ behavior of structures such as concrete slabs-on-grade,
C09.42 on Fiber-Reinforced Concrete.
shotcrete tunnel linings, and shotcrete embankment stabiliza-
Current edition approved July 1, 2005. Published August 2005. Originally
approved in 2002. Last previous edition approved in 2004 as C 1550-04.
tion linings. The post-crack performance of round panels
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
subject to a central point load can be represented by the energy
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
absorbed by the panel up to a specified central deflection. In
Standards volume information, refer to the standard’s Document Summary page on
this test method, the energy absorbed up to a specified central
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 Conshohocken, PA 19428-2959, United States.
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.