ASTM C656-17

Standard Specification for Structural Insulating Board, Calcium Silicate

ABSTRACT
This specification covers structural insulating board for general thermal insulating, fire-resistive, and marine bulkhead applications. The structural insulating boards shall be of the following types and grades: Types I and II and Grades 1; 2; 3; 4; 5; 6; 7; and 8. Calcium silicate structural insulating board shall be composed of hydrated calcium silicate with natural or man-made fibers or fillers, or a combination thereof. The following test methods shall be performed: dimensions and density; flexural strength; compressive strength; screw holding strength; apparent thermal conductivity; combustion characteristics; and maximum use temperatures.
SCOPE
1.1 This specification covers structural insulating board for general thermal insulating, fire-resistive, and marine bulkhead applications. The rigid, preformed structural insulating board is for use at temperatures up to 1700°F (927°C). For specific applications, the actual temperature limit shall be agreed upon between the manufacturer and the purchaser.  
1.2 The structural insulating board maintains its structural integrity after immersion in water.  
1.3 Rapid cycling over a wide temperature range is not recommended because of potential damage due to thermal shock.  
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.  
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 When the installation or use of thermal insulation materials, accessories and systems, may pose safety or health problems, the manufacturer shall provide the user appropriate current information regarding any known problems associated with the recommended use of the company's products, and shall also recommend protective measures to be employed in their safe utilization. The user shall establish appropriate safety and health practices and determine the applicability of regulatory requirements prior to use.  
1.7 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.

General Information

• Status: Historical
• Publication Date: 30-Sep-2017
• ICS: 91.100.60 - Thermal and sound insulating materials
• Technical Committee: C16 - Thermal Insulation
• Drafting Committee: C16.20 - Homogeneous Inorganic Thermal Insulations

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
Designation: C656 − 17
Standard Specification for
1
Structural Insulating Board, Calcium Silicate
This standard is issued under the fixed designation C656; 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 2. Referenced Documents
2
1.1 This specification covers structural insulating board for 2.1 ASTM Standards:
general thermal insulating, fire-resistive, and marine bulkhead C165 Test Method for Measuring Compressive Properties of
applications. The rigid, preformed structural insulating board is Thermal Insulations
for use at temperatures up to 1700°F (927°C). For specific C168 Terminology Relating to Thermal Insulation
applications, the actual temperature limit shall be agreed upon C177 Test Method for Steady-State Heat Flux Measure-
between the manufacturer and the purchaser. ments and Thermal Transmission Properties by Means of
the Guarded-Hot-Plate Apparatus
1.2 The structural insulating board maintains its structural
C203 Test Methods for Breaking Load and Flexural Proper-
integrity after immersion in water.
ties of Block-Type Thermal Insulation
1.3 Rapid cycling over a wide temperature range is not
C303 Test Method for Dimensions and Density of Pre-
recommended because of potential damage due to thermal
formed Block and Board–Type Thermal Insulation
shock.
C356 Test Method for Linear Shrinkage of Preformed High-
1.4 The values stated in inch-pound units are to be regarded Temperature Thermal Insulation Subjected to Soaking
Heat
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only C390 Practice for Sampling and Acceptance of Thermal
Insulation Lots
and are not considered standard.
C411 Test Method for Hot-Surface Performance of High-
1.5 This standard does not purport to address all of the
Temperature Thermal Insulation
safety concerns, if any, associated with its use. It is the
C447 Practice for Estimating the Maximum Use Tempera-
responsibility of the user of this standard to establish appro-
ture of Thermal Insulations
priate safety, health, and environmental practices and deter-
C518 Test Method for Steady-State Thermal Transmission
mine the applicability of regulatory limitations prior to use.
Properties by Means of the Heat Flow Meter Apparatus
1.6 When the installation or use of thermal insulation
C1045 Practice for Calculating Thermal Transmission Prop-
materials, accessories and systems, may pose safety or health
erties Under Steady-State Conditions
problems, the manufacturer shall provide the user appropriate
C1058 Practice for Selecting Temperatures for Evaluating
current information regarding any known problems associated
and Reporting Thermal Properties of Thermal Insulation
with the recommended use of the company’s products, and
D1037 Test Methods for Evaluating Properties of Wood-
shall also recommend protective measures to be employed in
Base Fiber and Particle Panel Materials
their safe utilization. The user shall establish appropriate safety
E136 Test Method for Behavior of Materials in a Vertical
and health practices and determine the applicability of regula-
Tube Furnace at 750°C
tory requirements prior to use.
1.7 This international standard was developed in accor-
3. Terminology
dance with internationally recognized principles on standard-
3.1 Definitions—The definitions in Terminology C168 shall
ization established in the Decision on Principles for the
apply to the terms used in this specification.
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical
4. Classification
Barriers to Trade (TBT) Committee.
4.1 The structural insulating boards shall be of the following
types:
1
This specification is under the jurisdiction of ASTM Committee C16 on
Thermal Insulation and is the direct responsibility of Subcommittee C16.20 on
2
Homogeneous Inorganic Thermal Insulations. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2017. Published October 2017. Originally contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
approved in 1970. Last previous edition approved in 2013 as C656 – 07 (2013). Standards volume information, refer to the standard’s Document Summary page on
DOI: 10.1520/C0656-17. the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C656 − 17
4.1.1 Type I—Maximum use temperature 1400°F (760°C).
Length Width Thicknes
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This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: C656 − 07 (Reapproved 2013) C656 − 17
Standard Specification for
1
Structural Insulating Board, Calcium Silicate
This standard is issued under the fixed designation C656; 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 structural insulating board for general thermal insulating, fire-resistive, and marine bulkhead
applications. The rigid, preformed structural insulating board is for use at temperatures up to 1700°F (927°C). For specific
applications, the actual temperature limit shall be agreed upon between the manufacturer and the purchaser.
1.2 The structural insulating board maintains its structural integrity after immersion in water.
1.3 Rapid cycling over a wide temperature range is not recommended because of potential damage due to thermal shock.
1.4 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
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 safety, health, and healthenvironmental practices and determine the
applicability of regulatory limitations prior to use.
1.6 When the installation or use of thermal insulation materials, accessories and systems, may pose safety or health problems,
the manufacturer shall provide the user appropriate current information regarding any known problems associated with the
recommended use of the company’s products, and shall also recommend protective measures to be employed in their safe
utilization. The user shall establish appropriate safety and health practices and determine the applicability of regulatory
requirements prior to use.
1.7 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
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
C203 Test Methods for Breaking Load and Flexural Properties of Block-Type Thermal Insulation
C303 Test Method for Dimensions and Density of Preformed Block and Board–Type Thermal Insulation
C356 Test Method for Linear Shrinkage of Preformed High-Temperature Thermal Insulation Subjected to Soaking Heat
C390 Practice for Sampling and Acceptance of Thermal Insulation Lots
C411 Test Method for Hot-Surface Performance of High-Temperature Thermal Insulation
C447 Practice for Estimating the Maximum Use Temperature of Thermal Insulations
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
C1058 Practice for Selecting Temperatures for Evaluating and Reporting Thermal Properties of Thermal Insulation
D1037 Test Methods for Evaluating Properties of Wood-Base Fiber and Particle Panel Materials
E136 Test Method for Behavior of Materials in a Vertical Tube Furnace at 750°C
1
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, 2013Oct. 1, 2017. Published March 2013October 2017. Originally approved in 1970. Last previous edition approved in 20072013 as
C656 – 07.C656 – 07 (2013). DOI: 10.1520/C0656-07R13.10.1520/C0656-17.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

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