Document Text Contents
Page 1
Designation: D 6690 – 07
Standard Specification for
Joint and Crack Sealants, Hot Applied, for Concrete and
Asphalt Pavements1
This standard is issued under the fixed designation D 6690; 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
1.1 This specification covers joint and crack sealants of the
hot applied type intended for use in sealing joints and cracks in
Portland Cement Concrete and Asphaltic Concrete Pavements.
1.2 This specification does not purport to cover the proper-
ties required of sealants for use in areas of Portland Cement
concrete or asphaltic pavement subject to jet fuel or other fuel
spillage such as vehicle and/or aircraft refuel and maintenance
areas.
1.3 The values stated in SI units are the standard.
1.4 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 appro-
priate safety and health practices and determine the applica-
bility of regulatory requirements prior to use.
2. Referenced Documents
2.1 ASTM Standards: 2
D 36 Test Method for Softening Point of Bitumen (Ring-
and-Ball Apparatus)
D 5167 Practice for Melting of Hot-Applied Joint and
Crack Sealant and Filler for Evaluation
D 5249 Specification for Backer Material for Use with
Cold- and Hot-Applied Joint Sealants in Portland-Cement
Concrete and Asphalt Joints
D 5329 Test Methods for Sealants and Fillers, Hot-Applied,
for Joints and Cracks in Asphaltic and Portland Cement
Concrete Pavements
2.2 Federal Specification:3
SS-S-1410C
3. General Requirements
3.1 The sealant shall be composed of a mixture of materials
that will form a resilient and adhesive compound capable of
effectively sealing joints and cracks in concrete and asphaltic
pavements against the infiltration of moisture and foreign
material throughout repeated cycles of expansion and contrac-
tion with temperature changes, and that will not, at ambient
temperatures, flow from the joint or be picked up by vehicle
tires. The material shall be capable of being brought to a
uniform pouring consistency suitable for completely filling the
joints without inclusion of large air holes or discontinuities and
without damage to the material. It shall remain relatively
unchanged in application characteristics for at least 6 h at the
recommended application temperature in the field.
4. Classification
4.1 Type I—A joint and crack sealant capable of maintain-
ing an effective seal in moderate climates. The material is
tested for low temperature performance at –18°C using 50 %
extension.
4.2 Type II—A joint and crack sealant capable of maintain-
ing an effective seal in most climates. Material is tested for low
temperature performance at –29°C using 50 % extension.
4.3 Type III—A joint and crack sealant capable of maintain-
ing an effective seal in most climates. Material is tested for low
temperature performance at –29°C using 50 % extension.
Special tests are included (formerly Federal Spec SS-S-
1401C).
4.4 Type IV—A joint and crack sealant capable of maintain-
ing an effective seal in climates experiencing very cold
temperatures. Material is tested for low temperature perfor-
mance at –29°C using 200 % extension.
NOTE 1—It is the responsibility of the user agency to determine which
type is most applicable to their conditions.
5. Physical Requirements
5.1 Maximum Heating Temperature—The maximum heat-
ing temperature is the highest temperature to which a sealant
can be heated, and still conform to all the requirements
specified herein. For purposes of testing as specified hereinaf-
ter, the application temperature shall be the same as the
1 This specification is under the jurisdiction of ASTM Committee D04 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.
Current edition approved Dec. 1, 2007. Published January 2008. Originally
approved in 2001. Last previous edition approved in 2006 as D 6690 – 06a.
2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [email protected] For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 Available from U.S. Government Printing Office Superintendent of Documents,
732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
www.access.gpo.gov.
1
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
Copyright ASTM International
Provided by IHS under license with ASTM Licensee=Boeing Co/5910770001
Not for Resale, 07/24/2008 22:52:48 MDT
Page 2
maximum heating temperature. The maximum heating tem-
perature shall be set forth by the manufacturer, shall be shown
on all containers and shall be provided to the testing agency
before any laboratory tests are begun.
5.2 The sealant shall conform to the requirements pre-
scribed in Table 1.
6. Sampling and Heating
6.1 Sampling:
6.1.1 Samples may be taken at the plant or warehouse prior
to delivery or at the time of delivery, at the option of the
purchaser. If sampling is done prior to shipment, the inspector
representing the purchaser shall have free access to the material
to be sampled. The inspector shall be afforded all reasonable
facilities for inspection and sampling which shall be conducted
so as not to interfere unnecessarily with the operation of the
works.
6.1.2 Samples shall consist of one of the manufacturer’s
original sealed containers selected at random from the lot or
batch of finished material. A batch or lot shall be considered as
all finished material that was manufactured simultaneously or
continuously as a unit between the time of compounding and
the time of packaging or placing in shipping containers.
6.1.3 Obtain the sealant portion for testing from the selected
manufacturer’s original sealed container in accordance with
Practice D 5167. The sample portion added to and heated in the
melter shall weigh 800 6 50 g for Types I, II, IV, and 1600 6
50 g for Type III. Both pots of the melter described in Practice
D 5167 shall be used for Type III.
6.2 Heating—Heat the material in accordance with Practice
D 5167.
6.2.1 The oil bath in the melter shall be heated to a
temperature between the sealant’s maximum heating tempera-
ture and 42°C above the sealant’s maximum heating tempera-
ture. (Never allow the oil temperature to exceed 288°C). Add
the sealant to the melter according to the instructions in
Practice D 5167. After the sample has been added to the melter,
regulate the oil temperature within the listed temperature limits
while raising the sealant’s temperature to manufacturer’s
recommended maximum heating temperature within the re-
quired 1 hour of time, as stated in Practice D 5167. Immedi-
ately upon reaching the maximum heating temperature, pour
samples for testing, except for Type III which shall be heated
for 3 h from the time of first addition to the melter.
7. Test Methods
7.1 Specimen Conditioning—Condition all specimens at
standard laboratory conditions for 24 6 4 h as specified in test
Method D 5329 prior to beginning any testing.
7.2 Cone Penetration—Determine cone penetration accord-
ing to Method D 5329 for Cone Penetration, non-immersed.
7.3 Softening Point—Determine the Softening Point accord-
ing to Test Method D 36. USP Glycerin shall be used for the
liquid.
7.4 Bond, Non-Immersed—Determine the bond according
to Test Method D 5329 for Bond, non-immersed.
7.4.1 After final scrubbing and blotting specified in Test
Method D 5329, air dry the blocks on their 12.7 mm 3 25.4
mm ends at standard laboratory conditions for 1 h 6 10 min.
prior to pouring bond specimens.
7.4.2 Immediately after conditioning the blocks as in 7.4.1,
assemble the blocks with spacers as specified in Test Method
D 5329 so the opening between the blocks will form a cured
sealant block that is 25.4 mm 6 0.1 mm wide for Type I and
12.7 6 0.1 mm wide for Type II , Type III, and Type IV.
7.4.3 After pouring material into the block opening, condi-
tion the specimen as in 7.1. After conditioning, remove spacers
and trim off excess material with a hot knife being careful not
to pull sealant from the block. Condition the test specimens not
less than 4 h at the temperature specified in Table 1 for the
Specific Type of Sealant. Immediately extend the specimen to
the prescribed percentage in Table 1 using the apparatus and
rate described in D 5329.
7.4.4 Re-compress and re-extend according to Test Method
D 5329 for the total number of cycles prescribed in Table 1.
The required cycles shall be completed within a 5-day period
from the time of pouring for Type II, III, and IV, and a 7-day
period for Type I.
7.5 Bond, Water Immersed, Type III Only—Determine the
Bond according to ASTM D 5329. Prepare the specimens as in
section 7.4 except after conditioning, immerse in water for 96
h as described in D 5329. Testing shall be completed in 5 days
from removal from the water for Types III.
7.6 Resilience—Use Test Method D 5329 for Resilience.
TABLE 1
Type I Type II Type III Type IV
Cone Penetration
at 25°C
90 max. 90 max. 90 max. 90-150
Softening Point °C (°F) 80 (176) minimum 80 (176) minimum 80 (176) minimum 80 (176) minimum
Bond, non-immersed Two out of three 25.4 mm
specimens passA 5 cycles
at 50 % ext. at -18°C
Three 12.7 mm Specimens
passA 3 cycles at 50 %
ext. at -29°C
Three 12.7 mm Specimens
passA 3 cycles at 50 %
ext. at -29°C
Three 12.7 mm Specimens
passA 3 cycles at 200 %
ext. at -29°C
Bond, water immersed -- -- Three 12.7 mm specimens
passA 3 cycles at 50 %
ext. at -29°C
--
Resilience, % -- 60 min. 60 min. 60 min.
Oven Aged Resilience,% -- -- 60 min. --
Asphalt Compatibility PassB PassB PassB PassB
A The development at any time during the test procedure of a crack, separation, or other opening that at any point is over 6 mm deep, in the sealant or between the
sealant and concrete block shall constitute failure of the test specimen. The depth of the crack, separation or other opening shall be measured perpendicular to the side
of the sealant showing the defect.
B There shall be no failure in adhesion, formation of an oily exudate at the interface between the sealant and asphaltic concrete or other deleterious effects on the
asphaltic concrete or sealant when tested at 60°C.
D 6690 – 07
2Copyright ASTM International
Provided by IHS under license with ASTM Licensee=Boeing Co/5910770001
Not for Resale, 07/24/2008 22:52:48 MDTNo reproduction or networking permitted without license from IHS
Page 3
7.7 Oven Aged Resilience—Age specimen @ 70°C for 168
h. Use Test Method D 5329.
7.8 Asphalt Compatibility—Test asphalt compatibility ac-
cording to Test Method D 5329.
8. Packaging and Marking
8.1 The sealing compound shall be delivered in the manu-
facturer’s original containers. Each container shall be legibly
marked with the name of the manufacturer, the trade name of
the sealant, the manufacturer’s batch, or lot number and
specification number and type, the minimum application tem-
perature and the maximum heating temperature. The maximum
heating temperature must be at least 11°C (20°F) higher than
the minimum application temperature.
9. Keywords
9.1 hot applied; joint sealant
APPENDIX
(Nonmandatory Information)
X1.
X1.1 Some if not all, materials conforming to this specifi-
cation may be damaged by heating to too high a temperature,
reheating, or by heating for too long a time. Care should be
exercised to secure equipment for heating and application that
is suitable for the purpose and approved by the manufacturer of
the material. The material should be heated in a kettle or melter
constructed as a double boiler, with the space between the inner
and outer shells filled with oil or other heat transfer medium.
Thermostatic control for the heat transfer medium shall be
provided and shall have sufficient sensitivity to maintain
sealant temperature within the manufacturer’s specified appli-
cation temperature range. Temperature indicating devices shall
have intervals no greater than 5°F (2.8°C) and shall be
calibrated as required to assure accuracy. The melter shall have
a continuous sealant agitation and mixing system to provide
uniform viscosity and temperature of material being applied. If
equipped with an application system to deliver sealant to the
pavement, the melter shall incorporate a recirculation pump or
other means of maintaining sealant temperature in the delivery
system. Sealant that has been damaged due to overheating,
reheating or prolonged heating may experience poor adhesion,
softening or bleeding, difficult application, or jelling in the
melter. Direct heating must not be used. As a means of
ascertaining whether or not the material covered by this
specification is being or has been damaged in the field as a
result of overheating, reheating, or prolonged heating, flow
panel specimens may be prepared periodically by drawing off
sealant directly from the melter-applicator during sealing
operations and then tested for flow according to the methods of
testing materials covered by this specification. Flow in excess
of 3.0 mm for Type II, III, and IV, and 5.0 mm for Type I would
indicate damage to material caused by improper heating
procedures.
X1.2 Pavement joints in new construction for application of
material covered by this specification should be dry, clean of
all scale, dirt, dust, curing compound, and other foreign matter.
The sidewalls of the joint space to be sealed should then be
thoroughly sandblasted, blown clean of loose sand by high-
pressure air, and sealed by use of the melter-applicator de-
scribed in X1.1.
X1.3 When material covered by this specification is used
for maintenance or resealing of joints that have contained
either similar or dissimilar sealing material, it is recommended
that the joint be dry, cleaned thoroughly with a plow, router,
wire brush, concrete saw, or other suitable tool or tools
designed for the purpose of neatly cleaning pavement joints.
Loose material should be blown out. The sidewalls of the joint
space to be sealed should be thoroughly sandblasted, blown
free of loose sand with high-pressure air and then sealed with
material by use of the melter-applicator described in X1.1.
X1.4 The use of a backer material or bond breaker in the
bottom of the joint to be filled with material covered by this
specification is recommended to control the depth of the
sealant and achieve the desired shape factor, and to support the
sealant against indentation and sag. Backup materials and bond
breakers should be compatible with the material. Due to the
elevated temperatures of application of material covered by
this specification, care should be exercised in the selection of
the suitable backer materials. Refer to Specification D 5249 for
recommended backer materials.
X1.5 Care should be practiced in the application of material
covered by this specification to avoid overfilling of the joint
space. Joints should be filled in a neat workmanlike manner
from 1⁄8 to 1⁄4 in. (3 to 6 mm) below the adjacent pavement
surface.
D 6690 – 07
3Copyright ASTM International
Provided by IHS under license with ASTM Licensee=Boeing Co/5910770001
Not for Resale, 07/24/2008 22:52:48 MDT
Designation: D 6690 – 07
Standard Specification for
Joint and Crack Sealants, Hot Applied, for Concrete and
Asphalt Pavements1
This standard is issued under the fixed designation D 6690; 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
1.1 This specification covers joint and crack sealants of the
hot applied type intended for use in sealing joints and cracks in
Portland Cement Concrete and Asphaltic Concrete Pavements.
1.2 This specification does not purport to cover the proper-
ties required of sealants for use in areas of Portland Cement
concrete or asphaltic pavement subject to jet fuel or other fuel
spillage such as vehicle and/or aircraft refuel and maintenance
areas.
1.3 The values stated in SI units are the standard.
1.4 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 appro-
priate safety and health practices and determine the applica-
bility of regulatory requirements prior to use.
2. Referenced Documents
2.1 ASTM Standards: 2
D 36 Test Method for Softening Point of Bitumen (Ring-
and-Ball Apparatus)
D 5167 Practice for Melting of Hot-Applied Joint and
Crack Sealant and Filler for Evaluation
D 5249 Specification for Backer Material for Use with
Cold- and Hot-Applied Joint Sealants in Portland-Cement
Concrete and Asphalt Joints
D 5329 Test Methods for Sealants and Fillers, Hot-Applied,
for Joints and Cracks in Asphaltic and Portland Cement
Concrete Pavements
2.2 Federal Specification:3
SS-S-1410C
3. General Requirements
3.1 The sealant shall be composed of a mixture of materials
that will form a resilient and adhesive compound capable of
effectively sealing joints and cracks in concrete and asphaltic
pavements against the infiltration of moisture and foreign
material throughout repeated cycles of expansion and contrac-
tion with temperature changes, and that will not, at ambient
temperatures, flow from the joint or be picked up by vehicle
tires. The material shall be capable of being brought to a
uniform pouring consistency suitable for completely filling the
joints without inclusion of large air holes or discontinuities and
without damage to the material. It shall remain relatively
unchanged in application characteristics for at least 6 h at the
recommended application temperature in the field.
4. Classification
4.1 Type I—A joint and crack sealant capable of maintain-
ing an effective seal in moderate climates. The material is
tested for low temperature performance at –18°C using 50 %
extension.
4.2 Type II—A joint and crack sealant capable of maintain-
ing an effective seal in most climates. Material is tested for low
temperature performance at –29°C using 50 % extension.
4.3 Type III—A joint and crack sealant capable of maintain-
ing an effective seal in most climates. Material is tested for low
temperature performance at –29°C using 50 % extension.
Special tests are included (formerly Federal Spec SS-S-
1401C).
4.4 Type IV—A joint and crack sealant capable of maintain-
ing an effective seal in climates experiencing very cold
temperatures. Material is tested for low temperature perfor-
mance at –29°C using 200 % extension.
NOTE 1—It is the responsibility of the user agency to determine which
type is most applicable to their conditions.
5. Physical Requirements
5.1 Maximum Heating Temperature—The maximum heat-
ing temperature is the highest temperature to which a sealant
can be heated, and still conform to all the requirements
specified herein. For purposes of testing as specified hereinaf-
ter, the application temperature shall be the same as the
1 This specification is under the jurisdiction of ASTM Committee D04 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.
Current edition approved Dec. 1, 2007. Published January 2008. Originally
approved in 2001. Last previous edition approved in 2006 as D 6690 – 06a.
2 For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [email protected] For Annual Book of ASTM
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 Available from U.S. Government Printing Office Superintendent of Documents,
732 N. Capitol St., NW, Mail Stop: SDE, Washington, DC 20401, http://
www.access.gpo.gov.
1
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
Copyright ASTM International
Provided by IHS under license with ASTM Licensee=Boeing Co/5910770001
Not for Resale, 07/24/2008 22:52:48 MDT
Page 2
maximum heating temperature. The maximum heating tem-
perature shall be set forth by the manufacturer, shall be shown
on all containers and shall be provided to the testing agency
before any laboratory tests are begun.
5.2 The sealant shall conform to the requirements pre-
scribed in Table 1.
6. Sampling and Heating
6.1 Sampling:
6.1.1 Samples may be taken at the plant or warehouse prior
to delivery or at the time of delivery, at the option of the
purchaser. If sampling is done prior to shipment, the inspector
representing the purchaser shall have free access to the material
to be sampled. The inspector shall be afforded all reasonable
facilities for inspection and sampling which shall be conducted
so as not to interfere unnecessarily with the operation of the
works.
6.1.2 Samples shall consist of one of the manufacturer’s
original sealed containers selected at random from the lot or
batch of finished material. A batch or lot shall be considered as
all finished material that was manufactured simultaneously or
continuously as a unit between the time of compounding and
the time of packaging or placing in shipping containers.
6.1.3 Obtain the sealant portion for testing from the selected
manufacturer’s original sealed container in accordance with
Practice D 5167. The sample portion added to and heated in the
melter shall weigh 800 6 50 g for Types I, II, IV, and 1600 6
50 g for Type III. Both pots of the melter described in Practice
D 5167 shall be used for Type III.
6.2 Heating—Heat the material in accordance with Practice
D 5167.
6.2.1 The oil bath in the melter shall be heated to a
temperature between the sealant’s maximum heating tempera-
ture and 42°C above the sealant’s maximum heating tempera-
ture. (Never allow the oil temperature to exceed 288°C). Add
the sealant to the melter according to the instructions in
Practice D 5167. After the sample has been added to the melter,
regulate the oil temperature within the listed temperature limits
while raising the sealant’s temperature to manufacturer’s
recommended maximum heating temperature within the re-
quired 1 hour of time, as stated in Practice D 5167. Immedi-
ately upon reaching the maximum heating temperature, pour
samples for testing, except for Type III which shall be heated
for 3 h from the time of first addition to the melter.
7. Test Methods
7.1 Specimen Conditioning—Condition all specimens at
standard laboratory conditions for 24 6 4 h as specified in test
Method D 5329 prior to beginning any testing.
7.2 Cone Penetration—Determine cone penetration accord-
ing to Method D 5329 for Cone Penetration, non-immersed.
7.3 Softening Point—Determine the Softening Point accord-
ing to Test Method D 36. USP Glycerin shall be used for the
liquid.
7.4 Bond, Non-Immersed—Determine the bond according
to Test Method D 5329 for Bond, non-immersed.
7.4.1 After final scrubbing and blotting specified in Test
Method D 5329, air dry the blocks on their 12.7 mm 3 25.4
mm ends at standard laboratory conditions for 1 h 6 10 min.
prior to pouring bond specimens.
7.4.2 Immediately after conditioning the blocks as in 7.4.1,
assemble the blocks with spacers as specified in Test Method
D 5329 so the opening between the blocks will form a cured
sealant block that is 25.4 mm 6 0.1 mm wide for Type I and
12.7 6 0.1 mm wide for Type II , Type III, and Type IV.
7.4.3 After pouring material into the block opening, condi-
tion the specimen as in 7.1. After conditioning, remove spacers
and trim off excess material with a hot knife being careful not
to pull sealant from the block. Condition the test specimens not
less than 4 h at the temperature specified in Table 1 for the
Specific Type of Sealant. Immediately extend the specimen to
the prescribed percentage in Table 1 using the apparatus and
rate described in D 5329.
7.4.4 Re-compress and re-extend according to Test Method
D 5329 for the total number of cycles prescribed in Table 1.
The required cycles shall be completed within a 5-day period
from the time of pouring for Type II, III, and IV, and a 7-day
period for Type I.
7.5 Bond, Water Immersed, Type III Only—Determine the
Bond according to ASTM D 5329. Prepare the specimens as in
section 7.4 except after conditioning, immerse in water for 96
h as described in D 5329. Testing shall be completed in 5 days
from removal from the water for Types III.
7.6 Resilience—Use Test Method D 5329 for Resilience.
TABLE 1
Type I Type II Type III Type IV
Cone Penetration
at 25°C
90 max. 90 max. 90 max. 90-150
Softening Point °C (°F) 80 (176) minimum 80 (176) minimum 80 (176) minimum 80 (176) minimum
Bond, non-immersed Two out of three 25.4 mm
specimens passA 5 cycles
at 50 % ext. at -18°C
Three 12.7 mm Specimens
passA 3 cycles at 50 %
ext. at -29°C
Three 12.7 mm Specimens
passA 3 cycles at 50 %
ext. at -29°C
Three 12.7 mm Specimens
passA 3 cycles at 200 %
ext. at -29°C
Bond, water immersed -- -- Three 12.7 mm specimens
passA 3 cycles at 50 %
ext. at -29°C
--
Resilience, % -- 60 min. 60 min. 60 min.
Oven Aged Resilience,% -- -- 60 min. --
Asphalt Compatibility PassB PassB PassB PassB
A The development at any time during the test procedure of a crack, separation, or other opening that at any point is over 6 mm deep, in the sealant or between the
sealant and concrete block shall constitute failure of the test specimen. The depth of the crack, separation or other opening shall be measured perpendicular to the side
of the sealant showing the defect.
B There shall be no failure in adhesion, formation of an oily exudate at the interface between the sealant and asphaltic concrete or other deleterious effects on the
asphaltic concrete or sealant when tested at 60°C.
D 6690 – 07
2Copyright ASTM International
Provided by IHS under license with ASTM Licensee=Boeing Co/5910770001
Not for Resale, 07/24/2008 22:52:48 MDTNo reproduction or networking permitted without license from IHS
Page 3
7.7 Oven Aged Resilience—Age specimen @ 70°C for 168
h. Use Test Method D 5329.
7.8 Asphalt Compatibility—Test asphalt compatibility ac-
cording to Test Method D 5329.
8. Packaging and Marking
8.1 The sealing compound shall be delivered in the manu-
facturer’s original containers. Each container shall be legibly
marked with the name of the manufacturer, the trade name of
the sealant, the manufacturer’s batch, or lot number and
specification number and type, the minimum application tem-
perature and the maximum heating temperature. The maximum
heating temperature must be at least 11°C (20°F) higher than
the minimum application temperature.
9. Keywords
9.1 hot applied; joint sealant
APPENDIX
(Nonmandatory Information)
X1.
X1.1 Some if not all, materials conforming to this specifi-
cation may be damaged by heating to too high a temperature,
reheating, or by heating for too long a time. Care should be
exercised to secure equipment for heating and application that
is suitable for the purpose and approved by the manufacturer of
the material. The material should be heated in a kettle or melter
constructed as a double boiler, with the space between the inner
and outer shells filled with oil or other heat transfer medium.
Thermostatic control for the heat transfer medium shall be
provided and shall have sufficient sensitivity to maintain
sealant temperature within the manufacturer’s specified appli-
cation temperature range. Temperature indicating devices shall
have intervals no greater than 5°F (2.8°C) and shall be
calibrated as required to assure accuracy. The melter shall have
a continuous sealant agitation and mixing system to provide
uniform viscosity and temperature of material being applied. If
equipped with an application system to deliver sealant to the
pavement, the melter shall incorporate a recirculation pump or
other means of maintaining sealant temperature in the delivery
system. Sealant that has been damaged due to overheating,
reheating or prolonged heating may experience poor adhesion,
softening or bleeding, difficult application, or jelling in the
melter. Direct heating must not be used. As a means of
ascertaining whether or not the material covered by this
specification is being or has been damaged in the field as a
result of overheating, reheating, or prolonged heating, flow
panel specimens may be prepared periodically by drawing off
sealant directly from the melter-applicator during sealing
operations and then tested for flow according to the methods of
testing materials covered by this specification. Flow in excess
of 3.0 mm for Type II, III, and IV, and 5.0 mm for Type I would
indicate damage to material caused by improper heating
procedures.
X1.2 Pavement joints in new construction for application of
material covered by this specification should be dry, clean of
all scale, dirt, dust, curing compound, and other foreign matter.
The sidewalls of the joint space to be sealed should then be
thoroughly sandblasted, blown clean of loose sand by high-
pressure air, and sealed by use of the melter-applicator de-
scribed in X1.1.
X1.3 When material covered by this specification is used
for maintenance or resealing of joints that have contained
either similar or dissimilar sealing material, it is recommended
that the joint be dry, cleaned thoroughly with a plow, router,
wire brush, concrete saw, or other suitable tool or tools
designed for the purpose of neatly cleaning pavement joints.
Loose material should be blown out. The sidewalls of the joint
space to be sealed should be thoroughly sandblasted, blown
free of loose sand with high-pressure air and then sealed with
material by use of the melter-applicator described in X1.1.
X1.4 The use of a backer material or bond breaker in the
bottom of the joint to be filled with material covered by this
specification is recommended to control the depth of the
sealant and achieve the desired shape factor, and to support the
sealant against indentation and sag. Backup materials and bond
breakers should be compatible with the material. Due to the
elevated temperatures of application of material covered by
this specification, care should be exercised in the selection of
the suitable backer materials. Refer to Specification D 5249 for
recommended backer materials.
X1.5 Care should be practiced in the application of material
covered by this specification to avoid overfilling of the joint
space. Joints should be filled in a neat workmanlike manner
from 1⁄8 to 1⁄4 in. (3 to 6 mm) below the adjacent pavement
surface.
D 6690 – 07
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Provided by IHS under license with ASTM Licensee=Boeing Co/5910770001
Not for Resale, 07/24/2008 22:52:48 MDT
