ASTM C1795-15

Standard Test Methods for High-Temperature Characterization of Gypsum Boards and Panels

SCOPE
1.1 These test methods describe three bench top test methods for measuring the thermophysical responses of gypsum boards and panels when exposed to high temperatures. The test methods are:  
1.1.1 High-temperature Core Cohesion—This test method evaluates the ability of the test specimen to withstand a specified mechanical strain while exposed to elevated temperature.  
1.1.2 High-temperature Shrinkage—This test method evaluates dimensional changes in the test specimen when exposed to elevated temperatures.  
1.1.3 High-temperature Thermal Insulation—This test method evaluates the rate of heat transfer through the thickness of the test specimen by measuring the length of time required to heat the center of the test specimen over a specified temperature rise when exposed to prescribed furnace conditions.  
1.2 The test methods appear in the following order:    
Test Method  
Section  
High-temperature Core Cohesion  
4  
High-temperature Shrinkage  
5  
High-temperature Thermal Insulation  
6  
1.3 Units—The values stated in either inch-pound units or SI units (given in parenthesis) are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.  
1.4 While these tests are useful for evaluating fire properties of gypsum boards and panels, they are not suitable for predicting the Test Methods E119 fire resistance performance of a specific gypsum protected assembly that has not previously been tested in accordance with Test Methods E119 and correlated to these tests.2  
1.5 This standard is used to measure and describe the response of materials, products, or assemblies to heat and flame under controlled conditions, but does not by itself incorporate all factors required for fire hazard or fire risk assessment of the materials, products, or assemblies under actual fire conditions.  
1.6 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: 30-Nov-2015
• ICS: 13.220.50 - Fire-resistance of building materials and elements
• ICS: 91.060.10 - Walls. Partitions. Facades
• Technical Committee: C11 - Gypsum and Related Building Materials and Systems
• Drafting Committee: C11.01 - Specifications and Test Methods for Gypsum Products

Relations

• Replaced By: ASTM C1795-17 - Standard Test Methods for High-Temperature Characterization of Gypsum Boards and Panels
• Effective Date: 01-Jun-2017

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: C1795 − 15
Standard Test Methods for
High-Temperature Characterization of Gypsum Boards and
1
Panels
This standard is issued under the fixed designation C1795; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope ously been tested in accordance with Test Methods E119 and
2
correlated to these tests.
1.1 These test methods describe three bench top test meth-
1.5 This standard is used to measure and describe the
ods for measuring the thermophysical responses of gypsum
response of materials, products, or assemblies to heat and
boardsandpanelswhenexposedtohightemperatures.Thetest
flame under controlled conditions, but does not by itself
methods are:
incorporate all factors required for fire hazard or fire risk
1.1.1 High-temperature Core Cohesion—This test method
assessment of the materials, products, or assemblies under
evaluates the ability of the test specimen to withstand a
actual fire conditions.
specifiedmechanicalstrainwhileexposedtoelevatedtempera-
1.6 This standard does not purport to address all of the
ture.
safety concerns, if any, associated with its use. It is the
1.1.2 High-temperature Shrinkage—Thistestmethodevalu-
responsibility of the user of this standard to establish appro-
atesdimensionalchangesinthetestspecimenwhenexposedto
priate safety and health practices and determine the applica-
elevated temperatures.
bility of regulatory limitations prior to use.
1.1.3 High-temperature Thermal Insulation—This test
methodevaluatestherateofheattransferthroughthethickness 2. Referenced Documents
of the test specimen by measuring the length of time required
2.1 ASTM Standards:
to heat the center of the test specimen over a specified
C11Terminology Relating to Gypsum and Related Building
temperature rise when exposed to prescribed furnace condi-
Materials and Systems
tions.
E119Test Methods for Fire Tests of Building Construction
and Materials
1.2 The test methods appear in the following order:
E631Terminology of Building Constructions
Test Method Section
2.2 Other Standards:
High-temperature Core Cohesion 4
EN 520Gypsum Plasterboards—Definitions, Requirements
High-temperature Shrinkage 5
High-temperature Thermal Insulation 6
and Test Methods
1.3 Units—The values stated in either inch-pound units or
3. Terminology
SI units (given in parenthesis) are to be regarded separately as
standard. The values stated in each system may not be exact
3.1 General—Refer to Terminologies C11 and E631 for
equivalents;therefore,eachsystemshallbeusedindependently standard terminology on gypsum and related building
materials, systems and building construction.
of the other. Combining values from the two systems may
result in non-conformance with the standard.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 Thermal Insulation Index (TI), n—asinglevalueindex
1.4 Whilethesetestsareusefulforevaluatingfireproperties
that denotes the rate of heating at the center of the Thermal
of gypsum boards and panels, they are not suitable for
Insulation Test specimen as determined by the elapsed time to
predicting the Test Methods E119 fire resistance performance
the nearest minute for the temperature to rise from 104 to
of a specific gypsum protected assembly that has not previ-
392°F (40 to 200°C).
1
ThistestmethodisunderthejurisdictionofASTMCommitteeC11onGypsum
2
and Related Building Materials and Systems and is the direct responsibility of Shipp, P. H., andYu, Q., “Thermophysical Characterization of Type X Special
Subcommittee C11.01 on Specifications and Test Methods for Gypsum Products. Fire Resistant Gypsum Board,” Proceedings of the Fire and Materials 2011
Current edition approved Dec. 1, 2015. Published January 2016. DOI: 10.1520/ Conference, San Francisco, Jan. 1, 2011 – Feb. 2, 2011, Interscience Communica-
C1795-15 tions Ltd., London, UK, pp417-426.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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C1795 − 15
4. High-temperature Core Cohesion the hanger strap. The loading weight may be configured as a
cup or disk to receive weighted shot or slotted disks to adjust
4.1 Summary of Test Method—The high-temperature core
the weight for different test specimen thicknesses. The total
cohesion of gypsum panel products is evaluated by applying a
weight of the entire loading device (hanger strap, loading
shear force and bending moment to a cantilevered test speci-
weight, suspension wire or hook) shall correspond to the
men by hanging a weight from the free end of the specimen.
nominal thickness of
...