ASTM C461-81(1997)e1
(Test Method)Standard Test Methods for Mastics and Coatings Used With Thermal Insulation
Standard Test Methods for Mastics and Coatings Used With Thermal Insulation
SCOPE
1.1 These test methods cover procedures for sampling and testing mastics and coatings for use as weather and vapor barrier finishes on thermal insulations and for other accessory use.
1.2 The values stated in inch-pound units are to be regarded as the standard. The metric equivalents of inch-pound units may be approximate.
1.3 The test methods appear in the following order: Section Sampling 3 Uniformity and Storage Stability 4 Stability Under Freezing 5 Density and Weight per Gallon 6 Consistency 7 Solids Content 8 Content of Volatiles and Coverage of Mastics and Coatings 9 Build 10 Drying Time 11 Flash Point 12
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 appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.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.
e1
Designation: C 461 – 81 (Reapproved 1997)
Standard Test Methods for
Mastics and Coatings Used With Thermal Insulation
This standard is issued under the fixed designation C 461; 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.
e NOTE—Keywords were added editorially in May 1997.
1. Scope D 93 Test Methods for Flash Point by Pensky-Martens
Closed Cup Tester
1.1 These test methods cover procedures for sampling and
D 140 Practice for Sampling Bituminous Materials
testing mastics and coatings for use as weather and vapor
D 217 Test Method for Cone Penetration of Lubricating
barrier finishes on thermal insulations and for other accessory
Grease
use.
D 2196 Test Methods for Rheological Properties of Non-
1.2 The values stated in inch-pound units are to be regarded
Newtonian Materials By Rotational (Brookfield) Viscom-
as the standard. The metric equivalents of inch-pound units
eter
may be approximate.
D 3278 Test Methods for Flash Point of Liquids by Set-
1.3 The test methods appear in the following order:
aflash Closed-Cup Apparatus
Section
Sampling 4
3. Terminology
Uniformity and Storage Stability 5
Stability Under Freezing 6
3.1 Definitions—For definitions of terms used in these test
Density and Weight per Gallon 7
methods, see Terminology C 168.
Consistency 8
Solids Content 9
Content of Volatiles and Coverage of Mastics and Coatings 10
4. Sampling
Build 11
4.1 Prior to opening or sampling, or both, any mastic or
Drying Time 12
Flash Point 13
coating, its Material Safety Data Sheet (MSDS) should be
reviewed to ensure appropriate precautions or personal protec-
1.4 This standard does not purport to address all of the
tive equipment, or both, are utilized.
safety concerns, if any, associated with its use. It is the
4.2 Take the samples for laboratory examination from the
responsibility of the user of this standard to establish appro-
original containers immediately after stirring to a uniform
priate safety and health practices and determine the applica-
condition. Determine the number of containers sampled as
bility of regulatory limitations prior to use.
required to represent a shipment in accordance with Practice
2. Referenced Documents
D 140. Restir the composite sample immediately before taking
out portions for individual tests.
2.1 ASTM Standards:
C 168 Terminology Relating to Thermal Insulating Materi-
5. Uniformity and Storage Stability
als
5.1 Open the original containers and examine them for
C 419 Practice for Making and Curing Test Specimens of
2 uniformity of contents. Record the degree of separation, if any,
Mastic Thermal Insulation Coatings
into portions of appreciably different consistency, such as thick
D 56 Test Method for Flash Point by Tag Closed Tester
or thin layers, sedimentation or coagulation, etc., also of
D 71 Test Method for Relative Density of Solid Pitch and
difficulty encountered in stirring to a uniform condition.
Asphalt (Displacement Method)
5.2 Examine the contents of a full container of not less than
1 qt (1 L) that has stood undisturbed for 48 h. Make notation
of any separation of solvent or water, coagulation, or settle-
These test methods are under the jurisdiction of ASTM Committee C-16 on
ment of suspended matter, that cannot be overcome by mod-
Thermal Insulation and are the direct responsibility of Subcommittee C16.33 on
erate agitation.
Thermal Insulation Finishes and Vapor Transmission.
Current edition approved Feb. 27, 1981. Published October 1981. Originally
published as C 461 – 60 T. Last previous edition C 461 – 64 (1975).
Annual Book of ASTM Standards, Vol 04.06.
3 5
Annual Book of ASTM Standards, Vol 05.01. Annual Book of ASTM Standards, Vol 04.03.
4 6
Annual Book of ASTM Standards, Vol 04.04. Annual Book of ASTM Standards, Vol 06.01.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
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.
C 461
5.3 Additionally, if required, examine and report the condi- held inclined toward the direction of motion at an angle of 45°
tion in the container after 3 months’ storage, examining for across the rim of the cup.
uniformity in accordance with 5.1. 8.3 Determine the cone-penetration reading in accordance
with Section 5 of Test Method D 217, with minimum time
6. Stability Under Freezing
between filling the cup and the reading to avoid temperature
6.1 Fill a 1-pt (500-mL) press-top tin can three quarters full
change of the sample. Report the average of the three tests to
with the coating, and hold the filled and closed container in a the nearest 0.1 mm as the penetration of the sample.
chamber at a temperature of 0 6 5°F (−18 6 3°C) for a
8.4 The practical limit of cone penetration is 375. If
minimum of 12 h consecutively under natural convection readings above this value are obtained, or if specified, an
conditions.
aluminum cone and shaft with a total weight of 50 g may be
6.2 At the expiration of the freezing period, permit the used in place of the 150-g cone and shaft specified in Test
coating to warm to room temperature by exposure of the
Method D 217. If with this modification, readings exceed a
container to the temperature of the laboratory for a minimum of penetration of 375, consistency alternatively may be deter-
6 h. After the first operation of freezing and thawing, repeat the
mined by Test Method D 2196. The helipath stand and T-bar
procedure twice so that the coating will have been subjected to spindles may be used.
three cycles of freezing and thawing.
9. Solids Content
6.3 After the completion of the third cycle, open the
container, and note any separation of solvent or water, coagu-
9.1 Weigh about5gof material to the nearest 0.01 g into a
lation, settlement of suspended matter, or the presence of weighed flat-bottom metal dish or container (Note 1). Place the
distinct layers, or a combination of these. If the compound
dish and its contents in an oven at 105 6 2°C (220 6 5°F) for
cannot be rendered homogeneous by moderate stirring at
2 to 4 h, or until the material shows a loss of not greater than
laboratory temperature, report that it has coagulated.
0.02 g on successive hourly weighings; then cool in a desic-
cator and weigh.
7. Density and Weight per Gallon
NOTE 1—A friction-top can plug, 50 to 80 mm in diameter, has been
7.1 Apparatus:
found convenient.
7.1.1 Container—Any suitable container of known volume
9.2 From the weight of the dried residue and the weight of
may be used. 7.1.1.1 describes one such conta
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.