ASTM E1801-00
(Practice)Standard Practice for Adhesive Bonding of Aluminum Facings in Foam and Beam Type Shelters
Standard Practice for Adhesive Bonding of Aluminum Facings in Foam and Beam Type Shelters
SCOPE
1.1 This practice covers the materials, processes, and quality controls to be used in the manufacture of adhesive-bonded, aluminum-faced, foam core sandwich panels for tactical shelters.
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 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
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Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: E 1801 – 00 An American National Standard
Standard Practice for
Adhesive Bonding of Aluminum Facings in Foam and Beam
Type Shelters
This standard is issued under the fixed designation E 1801; 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 cable to both the Type 1, 71°C (160°F), and Type 2, 93°C
(200°F), elevated humidity service type of foam and beam
1.1 This practice covers the materials, processes, and qual-
shelter.
ity controls to be used in the manufacture of adhesive-bonded,
aluminum-faced, foam core sandwich panels for tactical shel-
4. Facilities
ters.
4.1 Panel Assembly Layup Area—The panel assembly layup
1.2 The values stated in SI units are to be regarded as the
area shall be a ventilated area maintained at a minimum
standard. The values given in parentheses are for information
temperature of 20°C (68°F). The area shall be free of oils,
only.
grease, silicone, lint, or other contaminants detrimental to the
1.3 This standard does not purport to address all of the
production of adhesive bonds.
safety concerns, if any, associated with its use. It is the
4.2 Post-Curing Rooms—The post-curing rooms shall pro-
responsibility of the user of this standard to establish appro-
vide a uniform temperature distribution over all panels and
priate safety and health practices and determine the applica-
over all portions of the panels exposed for post-curing. The
bility of regulatory limitations prior to use.
total temperature range shall be no more than 14°C (25°F).
2. Referenced Documents
5. Apparatus
2.1 ASTM Standards:
5.1 Pressure Equipment—Pressure equipment for bonding
B 209 Specification for Aluminum and Aluminum-Alloy
2 of shelter panels shall be large enough to permit the bonding of
Sheet and Plate
a complete panel in one step. The manufacturer shall provide
E 1730 Specification for Rigid Foam for Use in Shelter
3 calibration and test data demonstrating that the temperature on
Sandwich Panel Cores
the two facings of the press platens during bonding will be
E 1749 Terminology of Rigid Wall Relocatable Shelters
equal and uniform within 63°C (65°F) of the indicated
E 1793 Practice for the Preparation of Aluminum Alloy for
temperature. The platens shall be flat to within 0.08 mm/305
Bonding in Foam and Beam Type Transportable Shelters
mm (0.003 in./ft) and shall be smooth having a maximum
E 1794 Specification for Adhesive for Bonding Foam Cored
surface roughness of 125 rms. The pressure equipment shall be
Sandwich Panels (200°F Elevated Humidity Service), Type
3 equipped with temperature and pressure recorders and controls
II Panels
that accurately control heat-up, pressure applied, and dwell
E 1800 Specification for Adhesive for Bonding Foam Cored
time.
Sandwich Panels (160°F Elevated Humidity Service), Type
3 5.2 Calibrations, Temperature and Pressure Requirements,
I Panels
and Controls—Gages shall be calibrated every 6 months by an
3. Significance and Use accredited independent laboratory or by the panel manufacturer
if approved by the purchaser. All calibrations shall be traceable
3.1 The formation of reproducible, durable adhesive bonds
to the National Institute of Standards and Technology. The
in structural units requires great care in the performance of the
latest calibration certificate shall be attached to the equipment
steps in the bonding process. Experience has shown that
near each gage. Thermocouples placed at each corner and at the
adhesive bonding carried out in accordance with this practice
center of each facing shall be used to demonstrate the unifor-
produces reproducible adhesive bonds. This practice is appli-
mity of the temperature. A permanent record of the pressure,
time, and temperature during bonding shall be maintained.
This practice is under the jurisdiction of ASTM Committee E06 on Perfor-
5.3 Calibration of Testing Equipment— Calibration of the
mance of Buildings and is the direct responsibility of Subcommittee E06.53 on
required testing equipment shall be done in accordance with
Materials and Processes for Durable Rigidwall Relocatable Structures.
Current edition approved Oct. 10, 2000. Published November 2000. Originally the equipment manufacturer’s instructions. All calibrations of
published as E 1801–96. Last previous edition E 1801–96.
test equipment required by this practice shall be traceable to the
Annual Book of ASTM Standards, Vol 02.02.
National Institute of Standards and Technology.
Annual Book of ASTM Standards, Vol 04.11.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
E 1801
6. Materials made prior to surface preparation or on the panel following
completion of the bonding operation. The faying surfaces of
6.1 The materials used in bonded panels shall meet the
aluminum parts to be bonded shall be prepared as designated in
requirements of the contract or specified drawings. All mate-
7.2.2. All prepared aluminum for bonded panels shall be stored
rials shall be stored and handled in such manner so as to
to prevent contamination of the bonding surface. Prepared
provide protection against degrading environments and me-
parts that are not bonded within 72 h after cleaning shall be
chanical damage.
reprocessed as designated in 7.2. The faying surfaces of plastic
6.2 Aluminum:
and foam and wood parts to be bonded shall be as designated
6.2.1 Facings—The facings shall be aluminum alloy con-
in 7.5 and 7.6 respectively. All material prepared for bonding
forming to Specification B 209 and shall be certified as
shall be handled with clean cotton gloves to prevent contami-
complying with the alloy, temper, and thickness requirements
nation of surfaces prior to bonding.
of the shelter specification. Facings shall be free of corrosion,
7.1.1 Adhesive Application—Adhesive shall be applied uni-
excessive oil canning (snap-buckling), dents, gouges, or other
formly on all faying surfaces of the parts being bonded. It shall
defects that may adversely affect the structural integrity of the
be applied in such a manner and in sufficient quantity to fill all
bonded panel. Manufacturers’ certification of reports of tests
voids between faying surfaces and to ensure a continuous bond
for mechanical properties and chemical composition shall be
between parts as evidenced by adhesive flash (squeeze-out) at
available or included with each shipment, or both.
the edges when the parts are cured.
6.2.2 Preparation of Aluminum-Alloy Parts for Bonding:
7.2 Assembly of Panels:
6.2.2.1 Type 1, 71°C (160°F), Elevated Humidity Service
7.2.1 Type 1 Panels—No more than 75 min at 25°C (77°F)
Shelters—The aluminum-alloy parts used in the manufacture
(45 min at 38°C (100°F)) shall elapse between the first
of Type 1 foam and beam panels shall be prepared for bonding
application of adhesive to the panel and the application of
in accordance with Specification E 1800. The surface resis-
pressure to that panel.
tance of 6061-T6 aluminum alloy test coupons cleaned by the
7.2.2 Type 2 Panels—No more than2hat 25°C (77°F) (45
same process, shall be no more than 100 microhms when
min at 38°C (100°F)) shall elapse between the application of
measured under a nominal electrode force of 4.14 6 1.70 MPa
adhesive to the panel and the application of pressure to that
(600 6 25 psi) and a current of 10 6 0.2 amperes. Five
panel.
coupons shall be tested during each4hof cleaning operations.
7.3 Cure of Bonded Panels:
6.2.2.2 Type 2, 93°C (200°F), Elevated Humidity Service
Shelters—The aluminum-alloy parts used in the manufacture 7.3.1 Type 1 Panels—Panels shall be cured at a temperature
of Type 2 foam and beam panels shall be prepared for bonding of not less than 52°C (125°F) for4horata temperature of
in accordance with Specification E 1794. The surface resis- 63°C (145 6 5°F) for not less than 1 h. Timing of the cure shall
tance of the cleaned parts, or test coupons of the same alloy and not start until the panel skins have reached the specified
temperature. Either cure shall be under a pressure of 0.05 6
cleaned by the same process, shall be no more than 100
microhms when measured under a nominal electrode force of 0.007 MPa (8.0 6 0.5 psi). The temperature for either cure
shall be fully attained within 2 h after the application of
4.14 6 1.7 MPa (600 6 25 psi) and a current of 10 6 0.2
amperes. Five coupons shall be tes
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