ASTM D5893-96
(Specification)Standard Specification for Cold Applied, Single Component, Chemically Curing Silicone Joint Sealant for Portland Cement Concrete Pavements
Standard Specification for Cold Applied, Single Component, Chemically Curing Silicone Joint Sealant for Portland Cement Concrete Pavements
SCOPE
1.1 This specification covers cold applied, single component, chemically curing silicone sealants that are based on polymers of polysiloxane structures and are intended for use in sealing joints and cracks in portland cement concrete highway and airfield pavements. The specification includes both non-sag and self-leveling types of sealants.
1.1.1 This specification does not purport to cover the properties required of sealants for use in areas of portland cement concrete pavements subject to jet fuel or other fuel spillage, such as vehicle or aircraft refueling and maintenance areas, or a combination thereof.
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 safety hazards caveat pertains only to the test methods portion, Section 8, 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. Specific precautionary statements are given in Appendix X1.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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Designation: D 5893 – 96
Standard Specification for
Cold Applied, Single Component, Chemically Curing
Silicone Joint Sealant for Portland Cement Concrete
Pavements
This standard is issued under the fixed designation D 5893; 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 C 1183 Test Method for Extrusion Rate of Elastomeric
Sealants
1.1 This specification covers cold applied, single compo-
D 412 Test Methods for Vulcanized Rubber and Thermo-
nent, chemically curing silicone sealants that are based on
plastic Rubbers and Thermoplastic Elastomers—Tension
polymers of polysiloxane structures and are intended for use in
D 1985 Practice for Preparing Concrete Blocks for Testing
sealing joints and cracks in portland cement concrete highway
Sealants, for Joints and Cracks
and airfield pavements. The specification includes both non-
D 2202 Test Method for Slump of Sealants
sag and self-leveling types of sealants.
D 5249 Specification for Backer Material for Use with
1.1.1 This specification does not purport to cover the
Cold- and Hot-Applied Joint Sealants in Portland-Cement
properties required of sealants for use in areas of portland
Concrete and Asphalt Joints
cement concrete pavements subject to jet fuel or other fuel
D 5329 Test Methods for Sealants and Fillers, Hot-Applied,
spillage, such as vehicle or aircraft refueling and maintenance
for Joints and Cracks in Asphaltic and Portland Cement
areas, or a combination thereof.
Concrete Pavements
1.2 The values stated in SI units are to be regarded as the
D 5535 Terminology Relating to Formed-in-Place Sealants
standard. The values given in parentheses are for information
for Joints and Cracks in Pavements
only.
G 23 Practice for Operating Light-Exposure Apparatus
1.3 The following safety hazards caveat pertains only to the
(Carbon-Arc Type) With and Without Water for Exposure
test methods portion, Section 8, of this specification: This
of Nonmetallic Materials
standard does not purport to address all of the safety concerns,
G 53 Practice for Operating Light- and Water-Exposure
if any, associated with its use. It is the responsibility of the user
Apparatus (Fluorescent UV-Condensation Type) for Expo-
of this standard to establish appropriate safety and health
sure of Nonmetallic Materials
practices and determine the applicability of regulatory limita-
tions prior to use. Specific precautionary statements are given
3. Terminology
in Appendix X1.
3.1 Definitions—Refer to Terminology D 5535 for defini-
2. Referenced Documents tions of the following terms used in this specification: backer
material, chemically curing sealant, joint, and sealant.
2.1 ASTM Standards:
C 639 Test Method for Rheological (Flow) Properties of
4. Classification
Elastomeric Sealants
4.1 Sealants meeting the requirements of this specification
C 661 Test Method for Indentation Hardness of
2 shall be classified according to type as one of the following:
Elastomeric-Type Sealants by Means of a Durometer
4.1.1 Type NS (Non-Sag)—A single component sealant that
C 679 Test Method for Tack-Free Time of Elastomeric
resists sagging after application in horizontal joints and re-
Sealants
quires tooling or forming into the joint to achieve the desired
C 792 Test Method for Effects of Heat Aging on Weight
application configuration.
Loss, Cracking, and Chalking of Elastomeric Sealants
4.1.2 Type SL (Self-Leveling)—A single component sealant
C 793 Test Method for Effects of Accelerated Weathering
that is self-leveling and has sufficient flow characteristics to
on Elastomeric Joint Sealants
form a smooth and level surface in horizontal joints without
tooling or forming after application.
This specification is under the jurisdiction of ASTM Committee D-4 on Road
and Paving Materials and is the direct responsibility of Subcommittee D04.33 on
Formed-In-Place Sealants for Joints and Cracks in Pavements. Annual Book of ASTM Standards, Vol 09.01.
Current edition approved Feb. 10, 1996. Published April 1996. Annual Book of ASTM Standards, Vol 04.03.
2 5
Annual Book of ASTM Standards, Vol 04.07. Annual Book of ASTM Standards, Vol 14.02.
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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.
D 5893
5. General Requirements 6.7.1 When tested in accordance with Test Method C 661
at−29 6 1°C (−20 6 2°F), using a Type A-2 durometer, the
5.1 The sealant shall be a uniform mixture with a consis-
hardness shall not exceed 25.
tency that is appropriate for application to joints in portland
6.7.2 When tested in accordance with Test Method C 661 at
cement concrete pavements through pressure feed application
23 6 2°C (73.4 6 3.6°F), using a Type 00 durometer, the
units or by hand caulking guns. The sealant shall cure by means
hardness shall not be less than 30.
of a chemical reaction of the components to form an elasto-
6.8 Flow—When tested in accordance with 8.10 at 93.3 6
meric seal that seals joints in concrete throughout repeated
1°C (200 6 2°F) for 72 h 6 30 min, there shall be no flow.
cycles of thermal expansion and contraction and against the
6.9 Rubber Properties in Tension:
infiltration of moisture and incompressibles.
6.9.1 Ultimate Elongation—When tested in accordance
5.2 When stored in the original, unopened containers at
with Test Methods D 412 using Die C, at 23 6 2°C (73.4 6
conditions recommended by the manufacturer, the sealant shall
3.6°F), and using a 500 6 20 mm/min (20 6 2 in./min)
be capable of meeting the specification requirements for at
elongation rate, the ultimate elongation of the sealant shall not
least six months after the original purchase.
be less than 600 %.
5.3 After specified curing in the laboratory, the color of the
6.9.2 Tensile Stress at 150 % Elongation—When tested in
cured sealant shall be as agreed upon by the purchaser and the
accordance with Test Methods D 412 using Die C, at 23 6 2°C
manufacturer.
(73.4 6 3.6°F), and using a 500 6 20 mm/min (20 6 2 in./min)
5.4 The sealant is intended for use in appropriately pre-
elongation rate, the tensile stress at 150 % elongation shall not
pared, clean, dry, and frost-free portland cement concrete joints
exceed 310 kPa (45 psi).
or cracks in new pavements or pavements that are being
6.10 Effects of Accelerated Weathering—After 500 h of
resealed.
exposure in accordance with 8.12, the sealant shall not flow,
show tackiness, the presence of an oil-like film, or reversion to
6. Physical Requirements
a mastic-like substance, form surface blisters either intact or
6.1 Cure Evaluation—The sealant shall cure throughout a
broken, form internal voids, or have surface crazing, chalking,
12.7 by 12.7 mm (0.5 by 0.5 in.) cross section within 21 days
cracking, hardening, or loss of rubber-like properties. The
when evaluated in accordance with 8.3. At 21 days 6 4hof
sealant shall not experience any cracking or crazing when
curing, the sealant shall not show the presence of any uncured
subjected to the Test Method C 793 bend test. Evidence of
material, as indicated by sealant that has not changed from a
physical change in the surface of the material by visual and
liquid to a solid state.
tactile examination shall constitute failure of this test.
6.2 Rheological Properties:
6.11 Resilience—When tested in accordance with 8.13, the
6.2.1 When tested in accordance with Test Method D 2202,
resilience of the sealant shall not be less than 75 %.
Type NS sealant shall not slump more than 7.6 mm (0.30 in.).
6.2.2 When tested in accordance with Test Method C 639
7. Sampling
for Type I sealant, Type SL sealant shall exhibit a smooth, level
7.1 Samples may be taken at the plant or warehouse prior to
surface with no indication of bubbling.
delivery or at the time of delivery, at the option of the
6.3 Extrusion Rate—When tested in accordance with Test
purchaser. If sampling is conducted prior to shipment, the
Method C 1183 for Type S sealants, the extrusion rate shall not
inspector representing the purchaser shall have free access to
be less than 50 mL/min (3.05 in. /min).
the material to be sampled. The inspector shall be afforded all
6.4 Tack-Free Time—The sealant shall be tack-free, with no
reasonable facilities for inspection and sampling that shall be
transfer of the sealant to the polyethylene, when tested at 5 h 6
conducted so as not to interfere unnecessarily with the opera-
10 min in accordance with Test Method C 679.
tion of the works.
6.5 Effects of Heat Aging—The sealant shall not lose more
7.2 Samples for testing shall consist of not less than 3.78 L
than 10 % of its original weight or show any cracking or
(1 gal) of the sealant. If the sealant is supplied in cartridges, a
chalking when tested in accordance with Test Method C 792.
sufficient number of cartridges shall be obtained at random to
6.6 Bond—The sealant shall be tested in accordance with
provide at least 3.78 L (1 gal). If the sealant is supplied in
8.8 at − 296 1°C (−20 6 2°F) for five complete cycles of
18.9-L (5-gal) or 207.9-L (55-gal) containers, the sample shall
100 % extension each. All three specimens shall meet the
be obtained from an unopened container. The container shall be
following requirements for bond:
opened and any surface covering removed to expose the
6.6.1 Non-Immersed—No specimen shall develop any
sealant. The required amount of sealant shall be removed from
crack, separation, or other opening in the sealant or between
the container quickly and placed in a container that will
the sealant and the concrete test blocks.
minimize exposure of the sealant to air. The sample container
6.6.2 Water-Immersed—No specimen shall develop any
shall be compatible with the sealant. Use of a liner inside the
crack, separation, or other opening in the sealant or between
container may assist in minimizing air exposure. The sample
the sealant and the concrete test blocks.
container shall be completely filled in a manner that excludes
6.6.3 Oven-Aged—No specimen shall develop any crack,
air entrapment and then sealed. A metal can with a double
separation, or other opening in the sealant or between the
friction lid lined with a polyethylene bag meets these require-
sealant and the concrete test blocks.
ments. After obtaining the sample from containers, any lining
6.7 Hardness: or covering shall be replaced to prevent exposure of the
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.
D 5893
material remaining in the container to air. The container lids may be cut in half to produce blocks that are 25.4 by 25.4 by
shall be replaced tightly. 76.2 mm (1 by 1 by 3 in.).
7.3 When the sample (other than those in cartridges) for
8.8.1.1 Prepare, store, and clean the blocks in accordance
testing is opened to begin laboratory testing, it shall be
with the procedure of Test Methods D 5329 for bond, non-
examined for the presence of cured material. Any skins of
immersed. After the specified scrubbing and blotting, place the
cured sealant shall be removed from the sample. The material
blocks on their 25.4 by 50.8-mm (1 by 2-in.) or 25.4 by
tested shall not contain any cured portions. If sufficient
25.4-mm (1 by 1-in.) ends, and allow them to dry for 16 to 24
quantities of uncured sealant cannot be obtained from the
h at standard laboratory conditions.
sample, or if cured portions of sealant are noted within the
8.8.2 Specimen Preparation—Prepare three test specimens
sample (other than surface skins), the sample shall be discarded
for each bond evaluation. Assemble each test specimen using
and a new sample obtained.
two prepared concrete test blocks. Assemble the blocks with
7.4 After opening and examination of the test sample, all
their 50.8 by 76.2-mm (2 by 3-in.) or 25.4 by 76.2-mm (1 by
test specimens shall be prepared without delay to minimize
3-in.) surfaces facing, using appropriate spacers to form a
curing of the sample. The sample should be handled in a
cavity in which the sealant is placed between the blocks, which
manner that minimizes air exposure while preparing test
is 12.70 6 0.13-mm wide by 12.70 6 0.13-mm deep by 50.80
specimens. If any cured material skins form on the sample
6 0.13-mm long (0.500 6 0.005-in. wide by 0.500 6 0.005-in.
while preparing test specimens, the cured material shall be
deep and 2.000 6 0.005-in. long). Use adhesive tape, rubber
removed prior to preparing additional specimens.
bands, or clamps to hold the block and spacer assembly
8. Test Methods
together. Center this cavity along the 76-mm (3-in.) length of
8.1 Standard Conditions for Laboratory Tests—The labora- the blocks; the ends of the sealant cavity shall each be 12.7 mm
tory atmospheric conditions, hereinafter referred to as standard ( ⁄2 in.) from the ends of the concrete test block. The spacers
conditions, shall be 23 6 2°C (73.4 6 3.6°F) and 50 6 5%
used shall be of appropriate dimensions to create the specified
relative humidity. Condition the sealant sample to be tested for sealant cavity. Construct the spacers of appropriate materials
at least 24 h at standard conditions prior to opening and
that will permit easy separation from the sealant without
beginning any tests.
damaging the sealant after it has cured. The spacers shall also
8.2 Test Specimen Curing—For tests requiring cured speci-
be compatible with the sealant, and there shall be no reaction
mens, perform curing in accordance with the specified condi-
between the spacers and the sealant. Suitable materials may
tions of temperature, humidity, and time listed in the following
include polyethylene, TFE-fluorocarbon, or metal covered with
test methods.
an adhesive-backed release film. Liquid or paste-type release
8.3 Cure Evaluation—Make and cure one bond sample, as
agents can be used; however, extreme care must be used to
specified in 8.8, at laboratory standard conditions for 21 days
prevent contamination of the test blocks. Apply sealant into the
6 4 h. To aid with specimen curing, spacers may be removed
cavity between the concrete blocks and spacers in a manner
prior to reaching the specified cure time, provided that the
that does not entrap air or result in voids in the sealant. Excess
sealant has cured sufficiently so that no damage or distortion of
sealant should be struck
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