ASTM C1902-22a

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Designation: C1902 − 22 C1902 − 22a
Standard Specification for
Cellular Glass Insulation Used in Building and Roof
Applications
This standard is issued under the fixed designation C1902; 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
1.1 This specification covers the general requirements for thermal insulation block composed of rigid cellular glass intended for
use in building exterior and interior walls, foundation, floor, ceiling, and roofing applications. The insulation blocks are intended
for continuous use at temperatures between 200°F and −50°F (93.3°C and −45.6°C).
1.2 This standard is intended to apply to rigid cellular glass thermal insulation block products that are commercially useful in
building exterior and interior walls, foundation, floor, ceiling, and roofing construction. For engineering and design purposes, users
need to follow specific product information provided by block manufacturers regarding physical properties, system design
considerations and installation recommendations.
1.3 The use of thermal insulation materials covered by this specification is typically regulated by building codes, or other agencies
that address fire performance or both. Where required, the fire performance of the material shall be addressed through standard fire
test methods established by the appropriate governing documents.
1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information
only. For conversion to metric units other than those contained in this standard, refer to IEEE/ASTM SI 10.
1.5 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, health, and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.6 This international standard was developed in accordance with internationally recognized principles on standardization
established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued
by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
2. Referenced Documents
2.1 ASTM Standards:
C165 Test Method for Measuring Compressive Properties of Thermal Insulations
C168 Terminology Relating to Thermal Insulation
C177 Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the
Guarded-Hot-Plate Apparatus
This specification is under the jurisdiction of ASTM Committee C16 on Thermal Insulation and is the direct responsibility of Subcommittee C16.20 on Homogeneous
Inorganic Thermal Insulations.
Current edition approved March 1, 2022Sept. 1, 2022. Published April 2022September 2022. Originally approved in 2020. Last previous edition approved in 20202022
as C1902 – 20.C1902 – 22. DOI: 10.1520/C1902-22.10.1520/C1902-22A.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
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C1902 − 22a
C203 Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation
C240 Test Methods for Testing Cellular Glass Insulation Block
C303 Test Method for Dimensions and Density of Preformed Block and Board–Type Thermal Insulation
C390 Practice for Sampling and Acceptance of Thermal Insulation Lots
C518 Test Method for Steady-State Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus
C1045 Practice for Calculating Thermal Transmission Properties Under Steady-State Conditions
C1617 Practice for Quantitative Accelerated Laboratory Evaluation of Extraction Solutions Containing Ions Leached from
Thermal Insulation on Aqueous Corrosion of Metals
D2126 Test Method for Response of Rigid Cellular Plastics to Thermal and Humid Aging
E84 Test Method for Surface Burning Characteristics of Building Materials
E96/E96M Test Methods for Gravimetric Determination of Water Vapor Transmission Rate of Materials
E136 Test Method for Assessing Combustibility of Materials Using a Vertical Tube Furnace at 750°C
3. Terminology
3.1 For definitions used in this specification, see Terminology C168.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 block, n—unfaced cellular glass.
3.2.2 board, n—fabricated flat, rectangular units composed of cellular glass insulation adhered together and covered with a facing
adhered to one or both major faces.
4. Classification
4.1 Cellular glass insulation covered by this specification shall be classified in the five Types shown in Table 1. Types vary in
compressive strength, density, thermal resistance, and flexural strength. Cellular glass insulation is furnished in the following types:
4.1.1 Type I—minimum R-3.6 per inch thermal resistance at 75°F mean temperature, minimum compressive strength 50 psi.
A
TABLE 1 Physical Requirements – Block
Properties Type I Type II Type III Type IV Type V
Density, min., pcf (kg/m ) 5.0 (80) 5.5 (88) 6.9 (110) 8.5 (136) 10.6 (170)
Thermal Resistance of
1-in. (25.4 mm) thickness
2 2 B
°F*ft *hr./Btu (K*m /W)
@ 100°F (38°C) mean temperature 3.4 (0.60) 3.0 (0.53) 2.8 (0.48) 2.5 (0.44) 2.2 (0.38)
@ 75°F (24°C) mean temperature 3.6 (0.64) 3.1 (0.55) 2.9 (0.51) 2.6 (0.46) 2.3 (0.40)
@ 50°F (10°C) mean temperature 3.8 (0.67) 3.3 (0.59) 3.0 (0.53) 2.7 (0.48) 2.4 (0.42)
@ 25°F (–4°C) mean temperature 4.0 (0.71) 3.5 (0.61) 3.2 (0.56) 2.8 (0.50) 2.4 (0.43)
Compressive Strength, min., psi (kPa) 50 (345) 55 (379) 100 (689) 160 (1103) 240 (1665)
Flexural Strength, min., psi (kPa) 30 (207) 35 (241) 45 (310) 65 (448) 85 (586)
Water absorption, vol.%, max. 0.5 0.5 0.5 0.5 0.5
Water Vapor permeability,
0.005 0.005 0.005 0.005 0.005
max. per-in.
(0.007) (0.007) (0.007) (0.007) (0.007)
-1 -1 -1
(ngPa *s *m )
Dimensional Stability,
Percent Linear Change,
max. in any direction
@ 200°F & Ambient R.H. 1.0 1.0 1.0 1.0 1.0
@ 158°F & 97% R.H. 1.0 1.0 1.0 1.0 1.0
@ -40°F & Ambient R.H. 1.0 1.0 1.0 1.0 1.0
C
Mass Loss Corrosion Rate (steel only) # DI # DI # DI # DI # DI
Surface Burning Characteristics
Flame Spread Index, max. 25 25 25 25 25
Smoke Developed Index, max. 50 50 50 50 50
Combustibility in a Vertical Tube Furnace Pass Pass Pass Pass Pass
A
Physical property requirements shown are for the materials in the as-manufactured condition. They do not necessarily represent the values of these properties under
certain in-service conditions, depending on the type of installation and the ultimate temperature exposure.
B
Properties shown are for 1 in. thick material. Thermal transmission properties of insulation will vary with temperature, temperature gradient, thickness, and shape. Note
the apparent thermal conductivity values in the table are based on samples tested under conditions specified in 12.2.2. These are comparative values for establishing
specification compliance. They do not necessarily represent the installed performance for the insulation under use conditions differing substantially from the test conditions.
C
DI = deionized water.
C1902 − 22a
4.1.2 Type II—minimum R-3.1 per inch thermal resistance at 75°F mean temperature, minimum compressive strength 55 psi.
4.1.3 Type III—minimum R-2.9 per inch thermal resistance at 75°F mean temperature, minimum compressive strength 100 psi.
4.1.4 Type IV—minimum R-2.6 per inch thermal resistance at 75°F mean temperature, minimum compressive strength 160 psi.
4.1.5 Type V—minimum R-2.3 per inch thermal resistance at 75°F mean temperature, minimum compressive strength 240 psi.
5. Ordering Information
5.1 Purchase orders for cellular glass insulation furnished to this specification shall include the following information:
5.1.1 Type designation (see 4.1).
5.1.2 Dimensions according to type (see Section 9).
6. Materials and Manufacture
6.1 The block material shall consist of a glass composition that has been foamed or cellulated under molten conditions, annealed,
and set to form a rigid noncombustible material with hermetically sealed cells. The material shall be trimmed into blocks of
standard dimensions that are rectangular or tapered.
7. Physical Properties
7.1 The cellular glass insulation shall conform to the following physical requirements in Table 1.
7.1.1 Density—Test in accordance with 12.2.1.
7.1.2 Apparent Thermal Re
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