ASTM E990-13

Standard Specification for Core-Splice Adhesive for Honeycomb Sandwich Structural Panels

ABSTRACT
This specification covers the requirements for core-splice adhesive for use with nonmetallic honeycomb cores in the fabrication of honeycomb sandwich panels used in relocatable structures. The adhesive shall be thermosetting, of film form, and capable of expanding to several times its original thickness and shall be cured at specific curing time, temperature, and pressure. Materials shall be tested for physical properties qualification which shall conform to water migration, volatility, expansion, sag, density, flexural shear strength or assembly compatibility, and tube shear or core splice integrity requirements. The adhesive shall be suitable for application to core material, edge members, and integral parts.
SCOPE
1.1 This specification covers core-splice adhesive for use with nonmetallic honeycomb cores in the fabrication of honeycomb sandwich panels used in relocatable structures. The adhesive shall be used for new production or depot repair. The adhesive shall be suitable for forming bonds that can withstand long combinations of stress, temperature, and relative humidity expected to be encountered in service. The adhesive shall be used for bonding core segments and for bonding core segments to edge members and to integral members in a honeycomb sandwich panel. The adhesive shall not allow the transfer of water from one part of the panel to another either through or along the line of the adhesive.  
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.  
1.3 The following precautionary caveat pertains only to the test method portion, Section 6, of this specification: 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: 30-Sep-2013
• ICS: 83.180 - Adhesives
• Technical Committee: E06 - Performance of Buildings
• Drafting Committee: E06.53 - Materials and Processes for Durable Rigidwall Relocatable Structures

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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:E990 −13
Standard Specification for
Core-Splice Adhesive for Honeycomb Sandwich Structural
1
Panels
This standard is issued under the fixed designation E990; 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.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope D792Test Methods for Density and Specific Gravity (Rela-
tive Density) of Plastics by Displacement
1.1 This specification covers core-splice adhesive for use
E631Terminology of Building Constructions
with nonmetallic honeycomb cores in the fabrication of hon-
E864Practice for Surface Preparation of Aluminum Alloys
eycomb sandwich panels used in relocatable structures. The
to Be Adhesively Bonded in Honeycomb Shelter Panels
adhesive shall be used for new production or depot repair.The
E865Specification for Structural Film Adhesives for Hon-
adhesiveshallbesuitableforformingbondsthatcanwithstand
eycomb Sandwich Panels
longcombinationsofstress,temperature,andrelativehumidity
E874Practice for Adhesive Bonding of Aluminum Facings
expected to be encountered in service. The adhesive shall be
to Nonmetallic Honeycomb Core for Shelter Panels
usedforbondingcoresegmentsandforbondingcoresegments
E1091Specification for Nonmetallic Honeycomb Core for
to edge members and to integral members in a honeycomb
Use in Shelter Panels
sandwich panel. The adhesive shall not allow the transfer of
E1749Terminology Relating to Rigid Wall Relocatable
water from one part of the panel to another either through or
Shelters
along the line of the adhesive.
3
2.2 Federal Standards:
1.2 The values stated in SI units are to be regarded as the
QQ-A-250/4 Aluminum Alloy 2024, Plate and Sheet
standard. The values given in parentheses are for information
QQ-A-250/8d Aluminum Alloy 5052H34, Plate and Sheet
only.
QQ-A-250/11d Aluminum Alloy 6061T6, Plate and Sheet
3
1.3 The following precautionary caveat pertains only to the
2.3 Military Standards:
test method portion, Section 6, of this specification: This
MIL-S-8802 Sealing Compound, Temperature-Resistant,
standard does not purport to address all of the safety concerns,
Integral Fuel Tanks, and Fuel Cell Cavities, High-
if any, associated with its use. It is the responsibility of the user
Adhesion
of this standard to establish appropriate safety and health
3. Terminology
practices and determine the applicability of regulatory limita-
tions prior to use.
3.1 Definitions—See Terminologies E631 and E1749 for
definitions of general terms used in this specification.
2. Referenced Documents
4. Materials and Manufacture
2
2.1 ASTM Standards:
B209Specification for Aluminum and Aluminum-Alloy 4.1 The adhesive shall be free of foreign materials, be
noncorrosive to the metal parts, and have the structural
Sheet and Plate
C393/C393MTest Method for Core Shear Properties of integrity equal to or better than that of an unspliced panel
section as specified in Table 1, Flexural Sheer.
Sandwich Constructions by Beam Flexure
5. Requirements
1 5.1 Material—The adhesive shall be thermosetting and
This specification is under the jurisdiction of ASTM Committee E06 on
Performance of Buildings and is the direct responsibility of Subcommittee E06.53 when tested in accordance with Section 6, shall meet the
on Materials and Processes for Durable Rigidwall Relocatable Structures.
requirements of Table 1. The adhesive shall not have a
Current edition approved Oct. 1, 2013. Published February 2014. Originally
deleterious effect on the panel nor on its component parts over
approved in 1984. Last previous edition approved in 2009 as E990–09. DOI:
the range of temperature at which the adhesive will be used.
10.1520/E0990-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from DLA Document Services, Building 4/D, 700 Robbins Avenue,
the ASTM website. Philadelphia, PA 19111-5094, http://quicksearch.dla.mil/.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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E990−13
TABLE 1 Physical Properties Qualification Requirements
Reference
Table Requirements
Paragraph
Water migration 6.1 Not more than the volume of
the cavity (in cell)
Volatility 6.2 1 % maximum
Expansion 6.3 1.75 minimum ratio
Sag for 1.27 mm (0.05 in.) 6.4 3.8 mm (0.15 in.) maximum
uncured thickness
Sag for 2.54 mm (0.1 in.) 6.4 12.7 mm (0.500 in.) maximum
unc
...

This document is not an ASTM standard and is intended only to provide the user of an ASTM 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: E990 − 09 E990 − 13
Standard Specification for
Core-Splice Adhesive for Honeycomb Sandwich Structural
1
Panels
This standard is issued under the fixed designation E990; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope
1.1 This specification covers core-splice adhesive for use with nonmetallic honeycomb cores in the fabrication of honeycomb
sandwich panels used in relocatable structures. The adhesive shall be used for new production or depot repair. The adhesive shall
be suitable for forming bonds that can withstand long combinations of stress, temperature, and relative humidity expected to be
encountered in service. The adhesive shall be used for bonding core segments and for bonding core segments to edge members
and to integral members in a honeycomb sandwich panel. The adhesive shall not allow the transfer of water from one part of the
panel to another either through or along the line of the adhesive.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.3 The following precautionary caveat pertains only to the test method portion, Section 56, of this specification: 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.
2. Referenced Documents
2
2.1 ASTM Standards:
B209 Specification for Aluminum and Aluminum-Alloy Sheet and Plate
C393C393/C393M Test Method for Flexural Core Shear Properties of Sandwich Constructions by Beam Flexure
D792 Test Methods for Density and Specific Gravity (Relative Density) of Plastics by Displacement
E631 Terminology of Building Constructions
E864 Practice for Surface Preparation of Aluminum Alloys to Be Adhesively Bonded in Honeycomb Shelter Panels
E865 Specification for Structural Film Adhesives for Honeycomb Sandwich Panels
E874 Practice for Adhesive Bonding of Aluminum Facings to Nonmetallic Honeycomb Core for Shelter Panels
E1091 Specification for Nonmetallic Honeycomb Core for Use in Shelter Panels
E1749 Terminology Relating to Rigid Wall Relocatable Shelters
3
2.2 Federal Standards:
QQ-A-250/4 Aluminum Alloy 2024, Plate and Sheet
QQ-A-250/8d Aluminum Alloy 5052H34, Plate and Sheet
QQ-A-250/11d Aluminum Alloy 6061T6, Plate and Sheet
3
2.3 Military Standards:
MIL-S-8802 Sealing Compound, Temperature-Resistant, Integral Fuel Tanks, and Fuel Cell Cavities, High-Adhesion
3. Terminology
3.1 Definitions—See Terminologies E631 and E1749 for definitions of general terms used in this specification.
1
This specification is under the jurisdiction of ASTM Committee E06 on Performance of Buildings and is the direct responsibility of Subcommittee E06.53 on Materials
and Processes for Durable Rigidwall Relocatable Structures.
Current edition approved Nov. 1, 2009Oct. 1, 2013. Published December 2009February 2014. Originally approved in 1984. Last previous edition approved in 20042009
as E990 – 04.E990 – 09. DOI: 10.1520/E0990-09.10.1520/E0990-13.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://dodssp.daps.dla.mil.DLA
Document Services, Building 4/D, 700 Robbins Avenue, Philadelphia, PA 19111-5094, http://quicksearch.dla.mil/.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
E990 − 13
4. Materials and Manufacture
4.1 The adhesive shall be free of foreign materials, be noncorrosive to the metal parts, and have the structural integrity equal
to or better than that of an unspliced panel section as specified in Table 1, Flexural Sheer.
5. Requirements
5.1 Material—The adhesive shall be thermosetting and when tested in accordance with Section 56, shall meet the req
...