ASTM A882/A882M-04a(2010)
(Specification)Standard Specification for Filled Epoxy-Coated Seven-Wire Prestressing Steel Strand (Withdrawn 2019)
Standard Specification for Filled Epoxy-Coated Seven-Wire Prestressing Steel Strand (Withdrawn 2019)
ABSTRACT
This specification covers filled epoxy-coated seven-wire prestressing steel strands with protective fusion-bonded epoxy coating applied by the electrostatic deposition method. This specification also covers relaxation loss limits for filled epoxy coated strands. Prestressing steel strands shall be free of contaminants such as oil, grease, or paint. Steel strand surfaces shall be cleaned to meet coating requirements, such as coating thickness, coating continuity, coating adhesion, coating composition, and coating bond with concrete or grout. Smooth or grit-impregnated coating shall be applied by the electrostatic deposition method or other method that will meet the coating requirements. Pullout tests shall be performed three times annually or maybe repeated if the coating failed to meet the requirements.
SCOPE
1.1 This specification covers ASTM Specification A416/A416M low-relaxation Grade 250 and Grade 270 seven-wire prestressing steel strand with protective fusion-bonded epoxy coating applied by the electrostatic deposition method or other method that will meet the coating requirements in Section 8, and, except as allowed by 1.2, with the interstices of the seven wires filled with epoxy to minimize migration of corrosive media, either by capillary action or other hydrostatic forces.
Note 1—The manufacturer as identified throughout this specification is the coating applicator.
1.2 Upon special request by the purchaser, the interstices are left unfilled.
Note 2—Unfilled strand can corrode from the inside and its application for prestressing tendons in concrete or for rock and soil anchors is not recommended.
1.3 This specification is applicable for orders in either inch-pound units (as Specification A882) or SI units [as Specification A882M].
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.
WITHDRAWN RATIONALE
This specification covers ASTM Specification A416/A416M1 low-relaxation Grade 250 and Grade 270 seven-wire prestressing steel strand with protective fusion-bonded epoxy coating applied by the electrostatic deposition method or other method that will meet the coating requirements in Section 8, and, except as allowed by 1.2, with the interstices of the seven wires filled with epoxy to minimize migration of corrosive media, either by capillary action or other hydrostatic forces.
Formerly under the jurisdiction of Committee A01 on Steel, Stainless Steel and Related Alloys, this specification was withdrawn in January 2019 in accordance with section 10.6.3 of the Regulations Governing ASTM Technical Committees, which requires that standards shall be updated by the end of the eighth year since the last approval date.
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Designation:A882/A882M −04a (Reapproved 2010)
Standard Specification for
Filled Epoxy-Coated Seven-Wire Prestressing Steel Strand
This standard is issued under the fixed designationA882/A882M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope 2. Referenced Documents
1.1 This specification covers ASTM Specification A416/ 2.1 ASTM Standards:
A416M low-relaxation Grade 250 and Grade 270 seven-wire A370Test Methods and Definitions for Mechanical Testing
prestressing steel strand with protective fusion-bonded epoxy of Steel Products
coating applied by the electrostatic deposition method or other A416/A416M Specification for Low-Relaxation, Seven-
method that will meet the coating requirements in Section 8, Wire Steel Strand for Prestressed Concrete
and, except as allowed by 1.2, with the interstices of the seven B117Practice for Operating Salt Spray (Fog) Apparatus
wires filled with epoxy to minimize migration of corrosive D968Test Methods for Abrasion Resistance of Organic
media, either by capillary action or other hydrostatic forces. Coatings by Falling Abrasive
G12Test Method for Nondestructive Measurement of Film
NOTE1—Themanufacturerasidentifiedthroughoutthisspecificationis
Thickness of Pipeline Coatings on Steel
the coating applicator.
G14TestMethodforImpactResistanceofPipelineCoatings
1.2 Uponspecialrequestbythepurchaser,theintersticesare
(Falling Weight Test)
left unfilled.
G20Test Method for Chemical Resistance of Pipeline Coat-
NOTE2—Unfilledstrandcancorrodefromtheinsideanditsapplication
ings
for prestressing tendons in concrete or for rock and soil anchors is not
2.2 Federal Highway Administration Report:
recommended.
FHWA-RD-74-18Nonmetallic Coatings for Concrete Rein-
1.3 This specification is applicable for orders in either
forcing Bars (February 1974)
inch-pound units (as Specification A882) or SI units [as
3. Terminology
Specification A882M].
3.1 Definitions of Terms Specific to This Standard:
1.4 The values stated in either SI units or inch-pound units
3.1.1 disbonding—loss of adhesion between the fusion-
are to be regarded separately as standard. The values stated in
bonded epoxy coating and the steel strand wires.
each system may not be exact equivalents; therefore, each
system shall be used independently of the other. Combining
3.1.2 fusion-bonded epoxy coating—a product containing
values from the two systems may result in non-conformance pigments, thermo-setting epoxy resins, cross-linking agents,
with the standard.
and other substances, which is applied in the form of powder
onto a clean, heated metallic substrate and fuses to form a
1.5 This international standard was developed in accor-
continuous barrier coating.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the 3.1.3 grit—inert particles impregnated on the outer surface
Development of International Standards, Guides and Recom-
of the epoxy coating for improving bond with cement grout.
mendations issued by the World Trade Organization Technical
3.1.4 holiday—a discontinuity in the coating that is not
Barriers to Trade (TBT) Committee.
discernible to a person with normal or corrected vision.
1 2
This specification is under the jurisdiction ofASTM Committee A01 on Steel, For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Stainless Steel and RelatedAlloys and is the direct responsibility of Subcommittee contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
A01.05 on Steel Reinforcement. Standards volume information, refer to the standard’s Document Summary page on
CurrenteditionapprovedMay1,2010.PublishedJuly2010.Originallyapproved the ASTM website.
in 1991. Last previous edition approved in 2004 as A882/A882M–04a. DOI: Available from National Technical Information Service (NTIS), 5285 Port
10.1520/A0882_A0882M-04AR10. Royal Rd., Springfield, VA 22161, http://www.ntis.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A882/A882M−04a (2010)
3.1.5 patching material—a liquid coating used to repair surface discernible to the unaided eye occurs. However, in no
damaged or uncoated areas. case shall application of the coating be delayed more than 10
min after cleaning, unless otherwise permitted by the pur-
4. Ordering Information
chaser.
4.1 The purchaser should specify:
7.2 The coating shall be applied by the electrostatic depo-
4.1.1 Diameter, grade, and type of uncoated strand in
sition method, or other method that will meet the coating
accordance with Specification A416/A416M (latest edition).
requirements in Section 8, and fully cured in accordance with
4.1.2 Smooth or grit impregnated coating (see 7.3).
the recommendations of the manufacturer of the coating
4.1.3 Quantity (in feet [metres]).
material.
4.1.4 Requirements for certification (see A1.2.3).
7.3 The coating may be smooth or grit-impregnated.
4.1.5 Requirements for material samples (see 5.3).
7.3.1 Inert particles (grit) shall be impregnated into the
4.1.6 Requirements for patching material (see 5.4).
surfaceofthecoatingwhengrit-impregnatedstrandisordered.
4.1.7 Number of pullout tests to be performed, if any.
Such particles shall not cause the coating to fail the require-
NOTE 3—A typical ordering description for epoxy-coated strand is as ments of Section 8. The particles shall be inert in concrete and
follows: 84000 feet [2560 m] of grit-impregnated epoxy-coated strand,
non-reactive with concrete additives and soluble salts.
⁄2-in. [12.7-mm] diameter, Grade 270 K low-relaxation on wooden reels
7.3.2 The epoxy on the surface of grit-impregnated strand
to ASTM Specification A882– [A882M– ].
shall be capable of reaching a temperature of 150°F [66°C]
without reducing the transfer of prestress by bond from the
5. Materials
strand to the surrounding concrete. (Warning—At tempera-
5.1 Prestressing steel strand to be coated shall meet the
tures above 165°F [74°C], currently available epoxy begins to
requirementsofSpecificationA416/A416Masspecifiedbythe
soften and lose its ability to transfer load from strand to
purchaserandshallbefreeofcontaminantssuchasoil,grease,
concrete by bond. At 200°F [93°C] practically all transfer
or paint.
capacity will be lost.)
5.1.1 Filledepoxy-coatedstrandshallhaverelaxationlosses
8. Requirements for Coated Strands
ofnotmorethan6.5%after1,000hours,wheninitiallyloaded
to 70% of the specified minimum breaking strength of the
8.1 Thickness of Coating:
strand when tested under conditions of Specification A416/
8.1.1 The coating thickness after curing shall be 15 to 45
A416M.
mils [380 to 1140 µm].
8.1.2 The thickness of the coating film shall be determined
5.2 The coating material shall meet the requirements listed
using a magnetic gauge or other method. The gauge shall be
inAnnexA1ofthisspecification.Thecoatingmaterialshallbe
used and calibrated in accordance with the manufacturer’s
of organic composition except for the pigment, or grit if
recommendations and Section 5 of Test Method G12, except
applicable, which may be inorganic if used.
thatin5.2.1ofTestMethodG12,thefoilshallbeplacedonthe
5.2.1 If specified in the order, a written certification shall be
surface of the bare strand instead of the steel plate. The gauge
furnished to the purchaser that properly identifies the number
shallbecapableofmeasuringthecoatingthicknessofacoated
of each batch of coating material used in the order, material,
wire of circular cross-section with a diameter in the range of
quantityrepresented,dateofmanufacture,nameandaddressof
0.1 to 0.3 in. [2.5 to 7.5 mm]. The allowable error on a single
manufacturer, a statement that the supplied coating material
measurement of the coating thickness on the coated crown of
meets the requirements of AnnexA1, and a statement that the
an outer wire of the strand shall be 65%.
coatingmaterialusedineachbatchisthesamematerialasthat
8.1.3 The coating thickness shall be measured on the crown
which was qualified under the requirements of Annex A1.
of each of the six outer wires at least every 2000 ft [600 m] of
5.3 If specified in the order, a representative 8-oz [0.23-kg]
continuous strand. The average of the coating thickness mea-
sample of coating material shall be packaged in an airtight
surements for each set of six outer wires shall be supplied to
container and identified by batch number, and supplied to the
the purchaser upon request. Records of inspection during
purchaser.
manufacture shall also be made available when requested.
5.4 If specified in the order, patching material compatible
8.2 Continuity of Coating:
withthecoatingmaterialandinertinconcrete,andmeetingthe
8.2.1 After application of the coating, a continuous in-line
requirements of Annex A1 shall be supplied to the purchaser.
holiday detection procedure shall be employed using an
aqueous electrolyte and a holiday detector with a minimum
6. Surface Preparation
voltage setting of 67.5 V DC, following the procedure fur-
6.1 The surface of the steel strand to be coated shall be
nished by its manufacturer. The approximate location of
cleaned chemically or by another method that will impart the
holidaysshallberecordedusingautomaticdevicesormarkings
same cleanliness to ensure that the coated strand meets the
on the strand for later patching.
requirements of Section 8.
8.2.2 The coated strand shall only be required to meet the
holiday requirements of this specification with the in-line
7. Application of Coating
holiday detector, but shall not be required to pass holiday
7.1 The coating shall be applied to the cleaned surface as inspection performed on stationary strand for residence times
soon as possible after cleaning and before reoxidation of the exceeding 3 seconds.
A882/A882M−04a (2010)
8.2.3 During the continuous holiday detection procedure, 5000psi[30and35MPa],andmeasuredwithacalibratedload
coated strand containing more than two holidays per hundred indicator at a slip of 0.001 in. [0.025 mm].Adial gage shall be
feet [30 m] shall be rejected and corrective action for the used at the unloaded end to indicate slip. Minimum force at
epoxy-coating process shall be instituted. Coated strand with 0.001 in. [0.025 mm] slip shall be at least equal to or greater
two holidays or less per hundred feet [30 metres] shall be than the values shown in Table 1.
patched in accordance with the patching material manufactur-
er’s recommendation. Patching of holidays shall be performed 9. Number of Tests
such that the total of the thicknesses of the coating and the
9.1 Three pullout tests shall be performed annually as a
patch does not exceed 1.1 mm [45 mils].
minimum or repeated when a process change is made that
could decrease the bond capacity of the epoxy-coated strand.
NOTE 4—Hand-held holiday detector checks should be performed
regularly to verify the accuracy of the in-line system.
The purchaser shall have the right to request additional pullout
teststobeperformedonthelotofepoxy-coatedstrandordered.
8.3 Adhesion of Coating:
8.3.1 Theadhesionandshearstrengthofthecoatingshallbe
10. Retests
evaluated by bending a sample from a finished reel of coated
strand 180° around a mandrel diameter equal to 32 times the
10.1 If the specimen for coating thickness, continuity, ad-
nominal diameter of the strand. Test specimens shall be at
hesion of coating, and pull-out tests fail to meet the specified
thermal equilibrium between 68 and 86°F [20 and 30°C].
requirements, two retest samples adjacent to the first sample
8.3.2 No cracking or disbonding of the coating shall be
fromthesamereelshallbeconductedforeachfailedtest.Ifthe
visible to the unaided eye on the outside radius of the bent
resultsofbothretestsmeetthespecifiedrequirements,thereels
strand. Evidence of cracking or disbonding of the coating shall
represented by the samples shall be accepted.
be considered cause for rejection of the coated strand repre-
sented by the bend test sample. Retests shall be conducted in
11. Inspection
accordance with 10.1.
11.1 The inspector representing the purchaser shall have
8.3.3 Fracture of the steel wire or strand in the bend test for
free entry while work on the contract of the purchaser is being
adhesion of coating shall not be considered as an adhesion
performed. The manufacturer shall afford the inspector all
failure of the coating, and another specimen from the same
reasonable facilities to satisfy him that the material is being
production shift may be substituted.
furnished in accordance with this specification. All tests and
8.3.4 The adhesion of coating shall also be evaluated by a
inspection shall be made at the place of manufacture prior to
tension test in accordance with Section 6 of Specification
shipment,unlessotherwisespecified,andshallbeconductedso
A416/A416M.The coated strand shall satisfy the requirements
there is no unnecessary interference with the manufacturer’s
for breaking strength, yield strength (1% extension), and
operation.
ultimate elongation described in Specification A416/A416M.
No cracks visible to the unaided eye shall occur in the coating
12. Rejection
up to an elongation of 1% (yield strength).
12.1 Except as specified in 10.1, coated strand reels repre-
8.3.5 Sample length for the bend test shall be at least 5 ft, 0
sentedbytestsamplesthatdonotmeettherequirementsofthis
in. long [1500 mm]. Sample length for the tension test shall
specification shall be rejected.
followtherequirementsofTestMethodsandDefinitionsA370.
12.2 Areel of coated strand that is rejected for thickness or
8.4 Bond with Concrete or Grout:
continuity of coating shall be accepted if the non-conforming
8.4.1 Pull-out tests shall be conducted on grit-impregnated
sections are removed and the remaining material meets the
coated strand to ensure proper bond properties. Pull-out speci-
coating requirements of this specification.
mens shall be cast in concrete cylinders with dimensions
shown in Table 1. The untensioned strand shall be embedded
13. Certification
concentricallyalongthelongitudinalaxisofthespecimen.The
minimumforceat0.001in.[0.025mm]slipshallbeappliedas
13.1 If outside inspection is waived, a manufacturer’s cer-
shown in Fig. 1, by a hydraulic or mechanical jack when
tification that the material has been tested in accordance with
concrete reaches a compressive strength between 4000 and
and meets the requirements of this specification shall be the
basis of acceptance of the material. The certification shall
include the specification number, year-d
...
This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation:A882/A882M–04a Designation: A882/A882M – 04a (Reapproved 2010)
Standard Specification for
Filled Epoxy-Coated Seven-Wire Prestressing Steel Strand
This standard is issued under the fixed designationA882/A882M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope *
1.1 This specification covers ASTM Specification A416/A416M low-relaxation Grade 250 and Grade 270 seven-wire
prestressing steel strand with protective fusion-bonded epoxy coating applied by the electrostatic deposition method or other
method that will meet the coating requirements in Section 8, and, except as allowed by 1.2, with the interstices of the seven wires
filled with epoxy to minimize migration of corrosive media, either by capillary action or other hydrostatic forces.
NOTE 1—The manufacturer as identified throughout this specification is the coating applicator.
1.2 Upon special request by the purchaser, the interstices are left unfilled.
NOTE 2—Unfilled strand can corrode from the inside and its application for prestressing tendons in concrete or for rock and soil anchors is not
recommended.
1.3 This specification is applicable for orders in either inch-pound units (as Specification A882) or SI units [as Specification
A882M].
1.4The values stated in either inch-pound or SI units are to be regarded as standard. Within the test, the SI units are shown in
brackets. The values stated in each system must be used independently of the other. Combining values from the two systems may
result in nonconformance with this specification.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each
system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the
two systems may result in non-conformance with the standard.
2. Referenced Documents
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A416/A416M Specification for Steel Strand, Uncoated Seven-Wire for Prestressed Concrete
B117 Practice for Operating Salt Spray (Fog) Apparatus
D968 Test Methods for Abrasion Resistance of Organic Coatings by Falling Abrasive
G12 Test Method for Nondestructive Measurement of Film Thickness of Pipeline Coatings on Steel
G14 Test Method for Impact Resistance of Pipeline Coatings (Falling Weight Test)
G20 Test Method for Chemical Resistance of Pipeline Coatings
2.2 Federal Highway Administration Report:
FHWA-RD-74-18 Nonmetallic Coatings for Concrete Reinforcing Bars (February 1974)
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 disbonding—loss of adhesion between the fusion-bonded epoxy coating and the steel strand wires.
3.1.2 fusion-bonded epoxy coating—aproductcontainingpigments,thermo-settingepoxyresins,cross-linkingagents,andother
substances, which is applied in the form of powder onto a clean, heated metallic substrate and fuses to form a continuous barrier
coating.
3.1.3 grit—inert particles impregnated on the outer surface of the epoxy coating for improving bond with cement grout.
ThisspecificationisunderthejurisdictionofASTMCommitteeA01onSteel,StainlessSteelandRelatedAlloysandisthedirectresponsibilityofSubcommitteeA01.05
on Steel Reinforcement.
Current edition approved MarchMay 1, 2004.2010. Published April 2004.July 2010. Originally approved in 1991. Last previous edition approved in 2004as
A882/A882M–04a. DOI: 10.1520/A0882_A0882M-04AR10.
ForreferencedASTMstandards,visittheASTMwebsite,www.astm.org,orcontactASTMCustomerServiceatservice@astm.org.For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from the National Technical Information Service (NTIS), 5285 Port Royal Rd., Springfield, VA 22161, http://www.ntis.gov.
*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.
A882/A882M – 04a (2010)
3.1.4 holiday—a discontinuity in the coating that is not discernible to a person with normal or corrected vision.
3.1.5 patching material—a liquid coating used to repair damaged or uncoated areas.
4. Ordering Information
4.1 The purchaser should specify:
4.1.1 Diameter, grade, and type of uncoated strand in accordance with Specification A416/A416M (latest edition).
4.1.2 Smooth or grit impregnated coating (see 7.3).
4.1.3 Quantity (in feet [metres]).
4.1.4 Requirements for certification (see Section A1.2.3).
4.1.5 Requirements for material samples (see 5.3).
4.1.6 Requirements for patching material (see 5.4).
4.1.7Number4.1.7 Number of pullout tests to be performed, if any.
NOTE 3—A typical ordering description for epoxy-coated strand is as follows: 84000 feet [2560 m] of grit-impregnated epoxy-coated strand, ⁄2-in.
[12.7-mm] diameter, Grade 270 K low-relaxation on wooden reels to ASTM Specification A882– [A882M– ].
5. Materials
5.1 Prestressing steel strand to be coated shall meet the requirements of Specification A416/A416M as specified by the
purchaser and shall be free of contaminants such as oil, grease, or paint.
5.1.1 Filled epoxy-coated strand shall have relaxation losses of not more than 6.5% after 1,000 hours, when initially loaded to
70% of the specified minimum breaking strength of the strand when tested under conditions of Specification A416/A416M.
5.2 The coating material shall meet the requirements listed inAnnexA1 of this specification. The coating material shall be of
organic composition except for the pigment, or grit if applicable, which may be inorganic if used.
5.2.1 If specified in the order, a written certification shall be furnished to the purchaser that properly identifies the number of
each batch of coating material used in the order, material, quantity represented, date of manufacture, name and address of
manufacturer, a statement that the supplied coating material meets the requirements ofAnnexA1, and a statement that the coating
material used in each batch is the same material as that which was qualified under the requirements of Annex A1.
5.3 If specified in the order, a representative 8-oz.8-oz [0.23-kg] sample of coating material shall be packaged in an airtight
container and identified by batch number, and supplied to the purchaser.
5.4 If specified in the order, patching material compatible with the coating material and inert in concrete, and meeting the
requirements of Annex A1 shall be supplied to the purchaser.
6. Surface Preparation
6.1 The surface of the steel strand to be coated shall be cleaned chemically or by another method that will impart the same
cleanliness to ensure that the coated strand meets the requirements of Section 8.
7. Application of Coating
7.1 The coating shall be applied to the cleaned surface as soon as possible after cleaning and before reoxidation of the surface
discernible to the unaided eye occurs. However, in no case shall application of the coating be delayed more than 10 minutesmin
after cleaning, unless otherwise permitted by the purchaser.
7.2 Thecoatingshallbeappliedbytheelectrostaticdepositionmethod,orothermethodthatwillmeetthecoatingrequirements
in Section 8, and fully cured in accordance with the recommendations of the manufacturer of the coating material.
7.3 The coating may be smooth or grit-impregnated.
7.3.1 Inert particles (grit) shall be impregnated into the surface of the coating when grit-impregnated strand is ordered. Such
particles shall not cause the coating to fail the requirements of Section 8. The particles shall be inert in concrete and non-reactive
with concrete additives and soluble salts.
7.3.2 The epoxy on the surface of grit-impregnated strand shall be capable of reaching a temperature of 150°F [66°C] without
reducing the transfer of prestress by bond from the strand to the surrounding concrete. Note4—(Warning:Warning—At
temperatures above 165°F [74°C], currently available epoxy begins to soften and lose its ability to transfer load from strand to
concrete by bond. At 200°F [93°C] practically all transfer capacity will be lost.)
8. Requirements for Coated Strands
8.1 Thickness of Coating:
8.1.1 The coating thickness after curing shall be 15 to 45 mils [380 to 1140 µm].
8.1.2 The thickness of the coating film shall be determined using a magnetic gauge or other method. The gauge shall be used
and calibrated in accordance with the manufacturer’s recommendations and Section 5 ofTest Method G12, except that in 5.2.1 of
Test Method G12, the foil shall be placed on the surface of the bare strand instead of the steel plate. The gauge shall be capable
of measuring the coating thickness of a coated wire of circular cross-section with a diameter in the range of 0.1 to 0.3 in. [2.5 to
7.5 mm].The allowable error on a single measurement of the coating thickness on the coated crown of an outer wire of the strand
shall be 65%.
A882/A882M – 04a (2010)
8.1.3 The coating thickness shall be measured on the crown of each of the six outer wires at least every 2000 ft [600 m] of
continuous strand. The average of the coating thickness measurements for each set of six outer wires shall be supplied to the
purchaser upon request. Records of inspection during manufacture shall also be made available when requested.
8.2 Continuity of Coating:
8.2.1 After application of the coating, a continuous in-line holiday detection procedure shall be employed using an aqueous
electrolyte and a holiday detector with a minimum voltage setting of 67.5 V DC, following the procedure furnished by its
manufacturer. The approximate location of holidays shall be recorded using automatic devices or markings on the strand for later
patching.
8.2.2 The coated strand shall only be required to meet the holiday requirements of this specification with the in-line holiday
detector, but shall not be required to pass holiday inspection performed on stationary strand for residence times exceeding 3
seconds.
8.2.3 Duringthecontinuousholidaydetectionprocedure,coatedstrandcontainingmorethantwoholidaysperhundredfeet[30
m]shallberejectedandcorrectiveactionfortheepoxy-coatingprocessshallbeinstituted.Coatedstrandwithtwoholidaysorless
per hundred feet [30 metres] shall be patched in accordance with the patching material manufacturer’s recommendation. Patching
ofholidaysshallbeperformedsuchthatthetotalofthethicknessesofthecoatingandthepatchdoesnotexceed1.1mm[45mils].
NOTE 54—Hand-held holiday detector checks should be performed regularly to verify the accuracy of the in-line system.
8.3 Adhesion of Coating:
8.3.1 Theadhesionandshearstrengthofthecoatingshallbeevaluatedbybendingasamplefromafinishedreelofcoatedstrand
180° around a mandrel diameter equal to 32 times the nominal diameter of the strand. Test specimens shall be at thermal
equilibrium between 68 and 86°F [20 and 30°C].
8.3.2 No cracking or disbonding of the coating shall be visible to the unaided eye on the outside radius of the bent strand.
Evidence of cracking or disbonding of the coating shall be considered cause for rejection of the coated strand represented by the
bend test sample. Retests shall be conducted in accordance with 10.1.
8.3.3 Fracture of the steel wire or strand in the bend test for adhesion of coating shall not be considered as an adhesion failure
of the coating, and another specimen from the same production shift may be substituted.
8.3.4 The adhesion of coating shall also be evaluated by a tension test in accordance with Section 6 of Specification
A416/A416M. The coated strand shall satisfy the requirements for breaking strength, yield strength (1% extension), and ultimate
elongation described in Specification A416/A416M. No cracks visible to the unaided eye shall occur in the coating up to an
elongation of 1% (yield strength).
8.3.5 Sample length for the bend test shall be at least 5 ft, 0 in. long [1500 mm]. Sample length for the tension test shall follow
the requirements of Test Methods and Definitions A370.
8.4 Bond with Concrete or Grout:
8.4.1 Pull-out tests shall be conducted on grit-impregnated coated strand to ensure proper bond properties. Pull-out specimens
shall be cast in concrete cylinders with dimensions shown in Table 1. The untensioned strand shall be embedded concentrically
along the longitudinal axis of the specimen. The minimum force at 0.001 in. [0.025 mm] slip shall be applied as shown in Fig.
1, by a hydraulic or mechanical jack when concrete reaches a compressive strength between 4000 and 5000 psi [30 and 35 MPa],
and measured with a calibrated load indicator at a slip of 0.001 in. [0.025 mm].Adial gage shall be used at the unloaded end to
indicate slip. Minimum force at 0.001 in. [0.025 mm] slip shall be at least equal to or greater than the values shown in Table 1.
9. Number of Tests
9.1Three9.1 Three pullout tests shall be performed annually as a minimum or repeated when a process change is made that
could decrease the bond capacity of the epoxy-coated strand. The purchaser shall have the right to request additional pullout tests
to be performed on the lot of epoxy-coated strand ordered.
10. Retests
10.1 If the specimen for coating thickness, continuity, adhesion of coating, and pull-out tests fail to meet the specified
requirements,tworetestsamplesadjacenttothefirstsamplefromthesamereelshallbeconductedforeachfailedtest.Iftheresults
TABLE 1 Requirements for Pull-Out Tests
Minimum Force
Cylinder Embedment
Strand Diameter at 0.001 in.
Diameter Length
[0.025 mm] Slip
in. mm in. mm in. mm lbf kN
⁄4 (0.250) 6.35 6 152 8.5 216 1700 7.56
⁄16 (0.313) 7.94 6 152 8.0 203 1960 8.72
⁄8 (0.375) 9.53 6 152 7.5 190 2210 9.83
⁄16 (0.438) 11.11 6 152 6.5 165 2230 9.92
⁄2 (0.500) 12.70 6 152 6.0 152 2350 10.45
(0.600) 15.25 6 152 5.5 140 2590 11.52
A882/A882M – 04a (2010)
FIG. 1 Recommended Arrangement for Pull-Out Testing
of both retests meet the specified requirements, the reels represented by the samples shall be accepted.
11. Inspection
11.1 The inspector representing the purchaser shall have free entry while work on the contract of the purchaser is being
performed. The manufacturer shall afford t
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