ASTM A820-01

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: A 820 – 01
Standard Specification for
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Steel Fibers for Fiber-Reinforced Concrete
This standard is issued under the fixed designation A 820; 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 (ε) indicates an editorial change since the last revision or reapproval.
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1. Scope 544.1R Committee Report on Fiber-Reinforced Concrete
1.1 This specification covers minimum requirements for
3. Terminology
steel fibers intended for use in fiber-reinforced concrete. Four
3.1 Symbols—The following symbols used in this specifi-
types of steel fibers for this purpose are defined as pieces of
cation are defined as follows:
smooth or deformed cold drawn wire; smooth or deformed cut
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A = cross-sectional area, in. (mm )
sheet; melt-extracted fibers; or other steel fibers that are
d = diameter, in. (mm)
sufficiently small to be dispersed at random in a concrete
f = ultimate tensile strength, psi (MPa)
u
mixture.
l = length, in. (mm)
1.2 This specification provides for measurement of dimen-
λ = l/d = aspect ratio
sions, tolerances from specified dimensions, and required
3.1.1 The subscript n on dimensional units indicates “nomi-
minimum physical properties, and prescribes testing proce-
nal” and the subscript e indicates “equivalent.” “Nominal” and
dures to establish conformance to these requirements.
“equivalent” dimensions are calculated from other measurable
1.3 In the case of conflict between a requirement of a
dimensions or average weights (masses).
product specification and a requirement of this specification,
the product specification shall prevail. In the case of a conflict
4. Classification
between a requirement of the product specification or a
4.1 Four general types of steel fibers are identified in this
requirement of this specification and a more stringent require-
specification based upon the product used as a source of the
ment of the purchase order, the purchase order shall prevail.
steel fiber material.
The purchase order requirements shall not take precedence if
4.1.1 Type I, cold drawn wire.
they, in any way, violate the requirements of the product
4.1.2 Type II, cut sheet.
specification or this specification; for example, by the waiving
4.1.3 Type III, melt-extracted.
of a test requirement or by making a test requirement less
4.1.4 Type IV, other fibers.
stringent.
4.2 Fibers may be straight or deformed.
1.4 The values stated in inch-pound units are to be regarded
as the standard. The values given in parentheses are for
5. Ordering Information
information only.
5.1 It shall be the responsibility of the purchaser to specify
all requirements that are necessary for product under this
2. Referenced Documents
specification. Such requirements to be considered include, but
2.1 The following documents, of the issue in effect on the
are not limited to, the following:
date of material purchase, form a part of this specification to
5.1.1 ASTM designation and year of issue,
the extent referenced herein.
5.1.2 Quantity in pounds or tons (kg or Mg),
2.2 ASTM Standards:
5.1.3 Type or types permissible (4.1),
A 370 Test Methods and Definitions for MechanicalTesting
5.1.4 Diameter or equivalent diameter (8.1), or range of
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of Steel Products
equivalent diameters (8.1.5),
C 1116 Specification for Fiber-Reinforced Concrete and
3 5.1.5 Length or nominal length (8.1),
Shotcrete
5.1.6 Deformations, if required, and
2.3 ACI Document:
5.1.7 Whether certification by the manufacturer is required
including whether a report is to be furnished (Section 11).
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This specification is under the jurisdiction of ASTM Committee A01 on Steel,
NOTE 1—For information on satisfactory sizes and aspect ratios, see
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
ACI 544.1R, and contact the manufacturers regarding availability.
A01.05 on Steel Reinforcement.
Current edition approved June 10, 2001. Published August 2001. Originally
published as A 820 – 85. Last previous edition A 820 – 96.
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Annual Book of ASTM Standards, Vol 01.03. Available fromAmerican Concrete Institute, P.O. Box 9094, Farmington Hills,
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Annual Book of ASTM Standards, Vol 04.02. MI 48333-9094.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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A820–01
6. Materials and Manufacture (out-to-out) after bending (l ). Nominal aspect ratio (λ)is
n n
established as (l /d)or(l /d ). See Fig. 1.
n n e
6.1 The materials and manufacturing methods used shall be
such that the fibers produced conform to the requirements in
this specification.
7. Mechanical Properties
7.1 Tensile Requirements:
7.1.1 At least one tensil
...