ASTM D173-97b

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Designation: D 173 – 97b
Standard Specification for
Bitumen-Saturated Cotton Fabrics Used in Roofing and
Waterproofing
This standard is issued under the fixed designation D 173; 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.
This standard has been approved for use by agencies of the Department of Defense. This standard replaces Federal Specification
SS-C-450.
1. Scope 3. Terminology
1.1 This specification covers woven cotton fabrics saturated 3.1 Definitions—For definitions of terms used in this speci-
with either asphalt or coal-tar pitch intended to be used with fication, refer to Terminology D 1079.
asphalts conforming to Specifications D 312 or D 449, coal-tar
4. Materials and Manufacture
pitches conforming to Specification D 450, or appropriate
solvent bearing bituminous materials in the construction of 4.1 In the process of manufacture, the dry cotton fabric shall
be thoroughly and uniformly saturated with bitumen. This shall
roofing and waterproofing systems.
1.1.1 Asphalt-saturated cotton fabric shall be used with be accomplished by passing the fabric through the saturant or
by spraying with saturant, calendering in the presence of heat,
asphalt base plying cement; typical ones are mopping asphalts
conforming to Specifications D 312 or D 449 or appropriate and then cooling before winding on a core.
4.2 If fabric with a selvage is used, the selvage shall not be
solvent bearing asphaltic compounds.
1.1.2 Coal-tar-saturated cotton fabric shall be used with more than ⁄8 in. (16 mm) wide.
4.3 The fabric shall be woven entirely from cotton fibers,
coal-tar based plying cements; a typical one is coal-tar pitch
conforming to Specification D 450 or appropriate solvent but customary sizing materials not exceeding 8 % by weight of
the moisture-free cotton shall be permitted to be used.
bearing coal-tar compounds.
1.2 The values stated in inch-pound units are to be regarded
5. Physical Properties
as the standard. The values given in parentheses are for
5.1 The material shall conform to the physical requirements
information only.
prescribed in Table 1 and the dimensions and masses pre-
2. Referenced Documents
scribed in Table 2.
2.1 ASTM Standards: 5.2 The finished product shall not crack nor be so sticky as
to cause tearing or other damage upon being unrolled at
D 146 Test Methods for Sampling and Testing Bitumen-
Saturated Felts and Woven Fabrics for Roofing and Wa- temperatures between 50 and 140°F (10 and 60°C).
terproofing
2 6. Workmanship, Finish, and Appearance
D 312 Specification for Asphalt Used in Roofing
6.1 The meshes of the fabric shall not be completely closed
D 449 Specification for Asphalt Used in Dampproofing and
or sealed by the process of saturation. There shall be sufficient
Waterproofing
porosity maintained to allow successive moppings of the
D 450 Specification for Coal-Tar Pitch Used in Roofing,
plying cement to seep through.
Dampproofing, and Waterproofing
6.2 The surface of the fabric shall not be coated or covered
D 1079 Terminology Relating to Roofing, Waterproofing,
with talc or other substances that would tend to interfere with
and Bituminous Materials
adhesion between the fabric and the plying cement. The use of
D 3775 Test Methods for Fabric Count of Woven Fabric
silica or wood flour is permissible.
6.3 The surface shall be uniformly smooth and free of
irregularities, folds, or knots.
This specification is under the jurisdiction of ASTM Committee D-8 on
6.4 The finished material shall be free of visible external
Roofing, Waterproofing, and Bituminous Materials and is the direct responsibility of
Subcommittee D08.04 on Felts and Fabrics for Bituminous Roofing and Water- defects such as ragged or untrue edges, breaks, rents, or cracks.
proofing.
Current edition approved Nov. 10, 1997. Published February 1998. Originally
7. Sampling and Test Methods
published as D 173 – 23 T. Last previous edition D 173 – 97a.
7.1 Sample the material and determine compliance with
Annual Book of ASTM Standards, Vol 04.04.
Annual Book of ASTM Standards, Vol 07.02.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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