Standard Specification for SEBS-Modified Mopping Asphalt Used in Roofing

ABSTRACT
This specification covers SEBS (styrene-ethylenebutylene-styrene)-modified mopping asphalt intended for use in built-up roof construction, construction of some modified bitumen systems, construction of bituminous vapor retarder systems, and for adhering insulation boards used in various types of roofing systems. This specification is intended as a material specification and issues regarding the suitability of specific roof constructions or application techniques are beyond its scope. The specified tests and property values are intended to establish minimum properties. In place system design criteria or performance attributes are factors beyond the scope of this specification. The base asphalt shall be prepared from crude petroleum and the SEBS-modified asphalt shall incorporate sufficient SEBS as the primary polymeric modifier. The SEBS modified asphalt shall be homogeneous and free of water and shall conform to the prescribed physical properties including (1) softening point before and after heat exposure, (2) softening point change, (3) flash point, (4) penetration before and after heat exposure, (5) penetration change, (6) solubility in trichloroethylene, (7) tensile elongation, (8) elastic recovery, and (9) low temperature flexibility. The sampling and test methods to determine compliance with the specified physical properties, as well as the evaluation for stability during heat exposure are detailed.
SCOPE
1.1 This specification covers SEBS (styrene-ethylene-butylene-styrene)-modified asphalt intended for use in built-up roof construction, construction of some modified bitumen systems, construction of bituminous vapor retarder systems, and for adhering insulation boards used in various types of roof systems.
1.2 This specification is intended as a material specification. Issues regarding the suitability of specific roof constructions or application techniques are beyond its scope.
1.3 The specified tests and property values used to characterize SEBS-modified asphalt are intended to establish minimum properties. In place system design criteria or performance attributes are factors beyond the scope of this specification.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
This standard does not purport to address 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.

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Historical
Publication Date
30-Apr-2005
Current Stage
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ASTM D6152-99(2005) - Standard Specification for SEBS-Modified Mopping Asphalt Used in Roofing
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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: D6152 – 99 (Reapproved 2005)
Standard Specification for
SEBS-Modified Mopping Asphalt Used in Roofing
This standard is issued under the fixed designation D6152; 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.
1. Scope D412 Test Methods for Vulcanized Rubber and Thermo-
plastic Elastomers—Tension
1.1 This specification covers SEBS (styrene-ethylene-
D1079 Terminology Relating to Roofing andWaterproofing
butylene-styrene)-modified asphalt intended for use in built-up
D2042 Test Method for Solubility of Asphalt Materials in
roof construction, construction of some modified bitumen
Trichloroethylene
systems, construction of bituminous vapor retarder systems,
D3111 Test Method for Flexibility Determination of Hot-
andforadheringinsulationboardsusedinvarioustypesofroof
Melt Adhesives by Mandrel Bend Test Method
systems.
1.2 This specification is intended as a material specification.
3. Terminology
Issues regarding the suitability of specific roof constructions or
3.1 Definitions—For definitions of general terms used in
application techniques are beyond its scope.
this specification, refer to Terminology D1079.
1.3 The specified tests and property values used to charac-
3.2 Definitions of Terms Specific to This Standard:
terize SEBS-modified asphalt are intended to establish mini-
3.2.1 elastic recovery, n—the degree to which a material
mumproperties.Inplacesystemdesigncriteriaorperformance
returns to its normal dimensions after being distorted.
attributes are factors beyond the scope of this specification.
3.2.2 low temperature flexibility, n—the ability of a material
1.4 The values stated in SI units are to be regarded as the
to bend at a prescribed rate around a mandrel of a prescribed
standard. The values given in parentheses are for information
diameter at a prescribed low temperature without cracking or
only.
breaking.
1.5 This standard does not purport to address the safety
concerns, if any, associated with its use. It is the responsibility
4. Materials and Manufacture
of the user of this standard to establish appropriate safety and
4.1 The base asphalt shall be prepared from crude petro-
health practices and determine the applicability of regulatory
leum.
limitations prior to use.
4.2 The SEBS-modified asphalt shall incorporate sufficient
2. Referenced Documents SEBS as the primary polymeric modifier to meet the require-
2 ments of this specification.
2.1 ASTM Standards:
D5 Test Method for Penetration of Bituminous Materials
5. Physical Requirements
D36 Test Method for Softening Point of Bitumen (Ring-
5.1 The SEBS modified asphalt shall be homogeneous and
and-Ball Apparatus)
free of water.
D92 Test Method for Flash and Fire Points by Cleveland
5.2 The SEBS modified asphalt shall conform to the physi-
Open Cup Tester
cal properties prescribed in Table 1.
D140 Practice for Sampling Bituminous Materials
D312 Specification for Asphalt Used in Roofing
6. Sampling
6.1 Sample the material as prescribed in Practice D140.
6.2 If the material is shipped in hot filled cardboard or
This specification is under the jurisdiction of ASTM Committee D08 on
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.03
plastic kegs, obtain samples from the kegs in accordance with
on Surfacing and Bituminous Materials for Membrane Waterproofing and Built-Up
the following procedure:
Roofing.
6.2.1 Remove the container from the block of SEBS-
Current edition approved May 1, 2005. Published May 2005. Originally
modified asphalt, cutting away the liner if present.
approved in 1997. Last previous edition approved in 1999 as D6152 – 99. DOI:
10.1520/D6152-99R05.
6.2.2 Using a hatchet or a hot knife, cut two vertical wedges
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
approximately 50 mm (2 in.) wide and 50 mm (2 in.) deep
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
along the entire length of the material block. Cut the wedges
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. into 100-mm (4-in.) lengths.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
D6152 – 99 (2005)
TABLE 1 Physical Requirements of SEBS-Modified Asphalt Used
where:
A
in Roofing
L = initial length between benchmarks, and
Property Min Max
X = length between benchmarks after recovery.
Softening point, °C (°F) 85 (185) 116 (240)
7.6 Determine high temperature stability by conditioning
before and after heat exposure
the specimen as prescribed in Section 8. Determine the
Softening point change, °C (°F) –5 (–9) 5 (9)
softening point of the specimen as prescribed by Test Method
after heat exposure
Flash point, °C (°F) 260 (500) . . .
D36. The softening point of the specimen shall not change by
Penetration, units at 25°C (77°F) 20 60
more than 10°C. Determine the penetration of the specimen as
before and after heat exposure
prescribed by Test Method D5. The penetration of the speci-
Penetration change, units at 25°C (77°F) –5 12
after heat exposure
men shall not change by more than 12 units. The softening
Solubility in trichloroethylene, % 99 . . .
point and penetration of the SEBS-modified asphalt shall
Tensile elongation, %, at 25°C (77°F) 750 . . .
remain within the specification limits after conditioning.
Elastic recovery, % 80 . . .
Low temperature flexibility, pass at° C (°F) . . . –7 (
...

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