ASTM D4990-97a(2005)e1

Standard Specification for Coal Tar Glass Felt Used in Roofing and Waterproofing

ABSTRACT
This specification covers glass felt impregnated with coal tar intended to be used with coal tar pitch in the construction of built-up roofs and waterproofing systems. The felt shall be a thin, porous sheet of uniformly distributed glass fibers, with or without the addition of reinforcing stranded glass yarns, and bonded with a water-resistant resinous binder. Longitudinal and transverse breaking strength, pliability, width, area, net dry mass, parting agent and stabilizer content, moisture content, desaturated mass, bituminous saturant (coal tar) content, and ash content are among the property requirements to which the glass felts should conform to.
SCOPE
1.1 This specification covers glass felt impregnated with coal tar intended to be used with coal tar pitch conforming to the appropriate requirements of Specification D 450 in construction of built-up roofs and in the construction waterproofing systems.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
The following safety hazards caveat pertains only to the test methods portion, Section , 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.

General Information

• Status: Historical
• Publication Date: 28-Feb-2005
• ICS: 91.100.50 - Binders. Sealing materials
• Technical Committee: D08 - Roofing and Waterproofing
• Drafting Committee: D08.04 - Felts, Fabrics and Bituminous Sheet Materials

Relations

• Replaces: ASTM D4990-97a - Standard Specification for Coal Tar Glass Felt Used in Roofing and Waterproofing
• Effective Date: 01-Mar-2005
• Replaced By: ASTM D4990-97a(2013) - Standard Specification for Coal Tar Glass Felt Used in Roofing and Waterproofing
• Effective Date: 15-May-2013
• Referred By: ASTM D2829/D2829M-07(2023) - Standard Practice for Sampling and Analysis of Existing Built-Up Roof Systems
• Effective Date: 01-Mar-2005
• Referred By: ASTM D6622/D6622M-20 - Standard Guide for Application of Fully Adhered Hot-Applied Reinforced Waterproofing Systems
• Effective Date: 01-Mar-2005
• Referred By: ASTM C981-20 - Standard Guide for Design of Built-Up Bituminous Membrane Waterproofing Systems for Building Decks
• Effective Date: 01-Mar-2005

Standards Content (Sample)

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
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Designation:D4990 −97a(Reapproved 2005)
Standard Specification for
Coal Tar Glass Felt Used in Roofing and Waterproofing
This standard is issued under the fixed designation D4990; 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.
´ NOTE—Editorially switched from English dominant to SI dominant in March 2005.
1. Scope drying to constant weight and after removing all detached
comminuted surfacing material as described in 8.2.
1.1 This specification covers glass felt impregnated with
coal tar intended to be used with coal tar pitch conforming to
4. Classification
the appropriate requirements of Specification D450 in con-
4.1 Coal tar impregnated glass felt covered by this specifi-
struction of built-up roofs and in the construction waterproof-
cation is of one type.
ing systems.
5. Materials and Manufacture
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
5.1 The felt shall be a thin, porous sheet of uniformly
only.
distributed glass fibers, with or without the addition of rein-
1.3 The following safety hazards caveat pertains only to the forcing stranded glass yarns, and bonded with a water-resistant
resinous binder.
test methods portion, Section 8, of this specification: This
standard does not purport to address all of the safety concerns,
5.2 In the process of manufacture, the felt shall be impreg-
if any, associated with its use. It is the responsibility of the user
nated with coal-tar which shall be permitted to contain a
of this standard to establish appropriate safety and health
mineral stabilizer so that the individual glass fibers are coated
practices and determine the applicability of regulatory limita-
and the coal tar is evenly distributed throughout.
tions prior to use.
5.3 The impregnated glass felt shall be surfaced lightly with
2. Referenced Documents a suitable finely comminuted material to prevent sticking in the
roll. The nature and quantity of the surfacing material shall not
2.1 ASTM Standards:
interfere with adhesion between the plies of a membrane.
D146 Test Methods for Sampling and Testing Bitumen-
Saturated Felts and Woven Fabrics for Roofing and
6. Physical Properties, Dimensions, and Masses
Waterproofing
6.1 The material shall conform to the physical properties,
D450 Specification for Coal-Tar Pitch Used in Roofing,
dimensions, and masses prescribed in Tables 1 and 2.
Dampproofing, and Waterproofing
D1079 Terminology Relating to Roofing and Waterproofing 6.2 The finished product shall not crack nor be so sticky as
to cause tearing or other damage upon being unrolled at
3. Terminology
temperatures between 10 and 60°C (50 and 140°F).
3.1 Definitions—For definitions of terms used in this
6.3 After extraction of the coal-tar in accordance with
specification, refer to Terminology D1079.
Section 16 of Test Methods D146, the desaturated felt shall
3.2 Definitions of Terms Specific to This Standard: remain flat and unbuckled, shall retain its original shape and
3.2.1 net dry mass—the mass of the coal tar impregnated dimensions, and individual fibers shall remain firmly set in
glass felt exclusive of wrapping and packing material, after place.
6.4 The pliability specimen shall be conditioned in air at 25
This specification is under the jurisdiction of ASTM Committee D08 on
6 1°C (77 6 2°F) for at least 1 h and tested in a room
Roofing and Waterproofing and is the direct responsibility of Subcommittee D08.04
maintained at the same temperature (immersion in water not
on Felts, Fabrics and Bituminous Sheet Materials.
required). Otherwise, follow Test Methods D146, 14.1 in
Current edition approved March 1, 2005. Published March 2005. Originally
approved in 1989. Last previous edition approved in 1997 as D4990 – 97a. DOI: section on Pliability.
10.1520/D4990-97AR05E01.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 7. Workmanship, Finish, and Appearance
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
7.1 The finished material shall be uniformly impregnated
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. with coal tar of uniform thickness, and shall be free of visible
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D4990−97a (2005)
TABLE 1 Physical Properties of Coal Tar Glass Felt
samples vertically and allow them to dry to a constant weight
A
Breaking Strength, min, kN/M (lbf/in.) Type 1 in a laboratory atmosphere of 23 6 2°C (73.4 6 3
...