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ASTM D7792/D7792M-15

(Practice)

Standard Practice for Freeze/Thaw Conditioning of Pultruded Fiber Reinforced Polymer (FRP) Composites Used in Structural Designs

Standard Practice for Freeze/Thaw Conditioning of Pultruded Fiber Reinforced Polymer (FRP) Composites Used in Structural Designs

SIGNIFICANCE AND USE
4.1 The freeze/thaw conditioning procedures prescribed in this practice are designed to provide a standard procedure to be used to evaluate and compare the effect of 100 freeze/thaw cycles under controlled laboratory conditions on pultruded FRP composites to be used in structural design applications. The conditioning procedures prescribed in this practice are designed to obtain reproducible results to compare and evaluate these materials but are not intended to produce equilibrium conditions or actual service conditions for these materials.
SCOPE
1.1 In general, it is feasible that the mechanical properties of FRP composites will be affected by environmental conditions such as freeze/thaw cycling. In order to make reliable comparisons between different materials under freeze/thaw environmental conditions, it is necessary to standardize the freeze/thaw conditions to which specimens of these materials are subjected prior to and during testing. This practice defines procedures for freeze/thaw conditioning of pultruded FRP composites intended for use in structural design applications.  
1.2 Units—The values stated in either SI units or inch-pound units 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 nonconformance with the standard.  
1.3 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
31-Aug-2015
ICS
83.120 - Reinforced plastics
Technical Committee
D20 - Plastics
Drafting Committee
D20.18 - Reinforced Thermosetting Plastics
Current Stage
Ref Project

Relations

Refers
ASTM D6641/D6641M-23 - Standard Test Method for Compressive Properties of Polymer Matrix Composite Materials Using a Combined Loading Compression (CLC) Test Fixture
Effective Date
15-Nov-2023
Refers
ASTM D7745-19 - Standard Practice for Testing Pultruded Composites
Effective Date
01-Nov-2019
Refers
ASTM D6641/D6641M-16 - Standard Test Method for Compressive Properties of Polymer Matrix Composite Materials Using a Combined Loading Compression (CLC) Test Fixture
Effective Date
01-Nov-2016
Refers
ASTM D7745-11 - Standard Practice for Testing Pultruded Composites
Effective Date
01-Sep-2011
Refers
ASTM D7290-06(2011) - Standard Practice for Evaluating Material Property Characteristic Values for Polymeric Composites for Civil Engineering Structural Applications
Effective Date
01-Aug-2011
Refers
ASTM D3918-11 - Standard Terminology Relating to Reinforced Plastic Pultruded Products (Withdrawn 2020)
Effective Date
01-Apr-2011
Refers
ASTM D6641/D6641M-09 - Standard Test Method for Compressive Properties of Polymer Matrix Composite Materials Using a Combined Loading Compression (CLC) Test Fixture
Effective Date
15-Apr-2009
Refers
ASTM D618-08 - Standard Practice for Conditioning Plastics for Testing
Effective Date
01-Nov-2008
Refers
ASTM D7290-06 - Standard Practice for Evaluating Material Property Characteristic Values for Polymeric Composites for Civil Engineering Structural Applications
Effective Date
01-Sep-2006
Refers
ASTM D618-05 - Standard Practice for Conditioning Plastics for Testing
Effective Date
01-Nov-2005
Refers
ASTM D3918-96(2003) - Standard Terminology Relating to Reinforced Plastic Pultruded Products
Effective Date
01-Nov-2003
Refers
ASTM D6641/D6641M-01e1 - Standard Test Method for Determining the Compressive Properties of Polymer Matrix Composite Laminates Using a Combined Loading Compression (CLC) Test Fixture
Effective Date
10-Mar-2001
Refers
ASTM D618-00 - Standard Practice for Conditioning Plastics for Testing
Effective Date
10-Nov-2000
Refers
ASTM D3918-96 - Standard Terminology Relating to Reinforced Plastic Pultruded Products
Effective Date
01-Jan-1996

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ASTM D7792/D7792M-15 - Standard Practice for Freeze/Thaw Conditioning of Pultruded Fiber Reinforced Polymer (FRP) Composites Used in Structural DesignsASTM D7792/D7792M-15 - Standard Practice for Freeze/Thaw Conditioning of Pultruded Fiber Reinforced Polymer (FRP) Composites Used in Structural Designs
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ASTM D7792/D7792M-15 - Standard Practice for Freeze/Thaw Conditioning of Pultruded Fiber Reinforced Polymer (FRP) Composites Used in Structural Designs
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Standards Content (Sample)

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.
Designation: D7792/D7792M − 15
Standard Practice for
Freeze/Thaw Conditioning of Pultruded Fiber Reinforced
1
Polymer (FRP) Composites Used in Structural Designs
This standard is issued under the fixed designation D7792/D7792M; 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 Loading Compression (CLC) Test Fixture
D7290 Practice for Evaluating Material Property Character-
1.1 Ingeneral,itisfeasiblethatthemechanicalpropertiesof
istic Values for Polymeric Composites for Civil Engineer-
FRP composites will be affected by environmental conditions
ing Structural Applications
such as freeze/thaw cycling. In order to make reliable com-
D7745 Practice for Testing Pultruded Composites
parisons between different materials under freeze/thaw envi-
ronmental conditions, it is necessary to standardize the freeze/
3. Terminology
thaw conditions to which specimens of these materials are
3.1 Definitions:
subjected prior to and during testing. This practice defines
3.1.1 standard laboratory temperature—a temperature of
procedures for freeze/thaw conditioning of pultruded FRP
23 6 2°C [73.4 6 3.6°F].
composites intended for use in structural design applications.
3.1.2 standard laboratory atmosphere—an atmosphere hav-
1.2 Units—The values stated in either SI units or inch-
ing a temperature of 23 6 2°C [73.4 6 3.6°F] and a relative
pound units are to be regarded separately as standard. The
humidity of 50 6 10 %.
values stated in each system may not be exact equivalents;
3.1.3 freeze/thaw resistance—the ability of a thermoset
therefore, each system shall be used independently of the other.
pultruded composite to withstand repeated water exposure and
Combining values from the two systems may result in noncon-
subsequent freeze cycling for 100 freeze/thaw cycles. This
formance with the standard.
ability will be quantified in terms of the % retention of the
1.3 This standard does not purport to address all of the
mechanical property of interest as compared to samples ex-
safety concerns, if any, associated with its use. It is the
posed to water for a comparable time without subsequent
responsibility of the user of this standard to establish appro-
freeze/thaw cycling.
priate safety and health practices and determine the applica-
3.2 Terminology relating to pultruded composites is found
bility of regulatory limitations prior to use.
in Terminology D3918.
2. Referenced Documents
4. Significance and Use
2
2.1 ASTM Standards:
4.1 The freeze/thaw conditioning procedures prescribed in
D618 Practice for Conditioning Plastics for Testing
this practice are designed to provide a standard procedure to be
D3918 Terminology Relating to Reinforced Plastic Pul-
used to evaluate and compare the effect of 100 freeze/thaw
truded Products
cycles under controlled laboratory conditions on pultruded
D6641/D6641M Test Method for Compressive Properties of
FRP composites to be used in structural design applications.
Polymer Matrix Composite Materials Using a Combined
The conditioning procedures prescribed in this practice are
designed to obtain reproducible results to compare and evalu-
1
This test method is under the jurisdiction ofASTM Committee D20 on Plastics
ate these materials but are not intended to produce equilibrium
and is the direct responsibility of Subcommittee D20.18 on Reinforced Thermoset-
conditions or actual service conditions for these materials.
ting Plastics.
Current edition approved Sept. 1, 2015. Published October 2015. DOI: 10.1520/
5. Sampling
D7792_D7792M-15.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5.1 Sampling shall be in accordance with the locations from
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
which test specimens shall be taken from the reinforced
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. pultruded composites as defined in Practice D7745.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7792/D7792M − 15
5.2 Sampling shall be in accordance with the ASTM test tank after this initial 30 day moisture exposure period shall be
methods for the specific mechanical properties to be deter- considered to be control test specimens at 0 freeze/thaw cycles.
3
mined.
8.1.1 Distilled water shall be used for all conditioning.
Dist
...

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1.1 This test method covers the determination of the apparent horizontal shear strength of fiber reinforced plastic rods. The specimen is a short beam in the form of lengths of pultruded rods. This test method is applicable to all types of parallel-fiber-reinforced plastic rod samples.  
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This specification covers glass-fiber reinforced polyester plastic panels intended for use in construction. Light transmitting panels covered by this specification are divided into two types, based on relative response to a laboratory flammability test: Type CC1 for limited flammability and Type CC2 for general purpose. These types may be further subdivided by grades based on relative response to weathering tests: Grade 1 for weather resistance and Grade 2 for general purpose. The polyester resin used in the panels shall be a thermosetting styrenated and acrylated polyester resin composed of polymeric esters in which the recurring ester groups are an integral part of the main polymer chain. The resin shall be reinforced with glass fibers. The polyester resin may contain additives for various purposes. The materials shall be tested for water absorption, tensile strength, linear thermal expansion, and flexural strength.
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1.6.1 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.  
1.6.2 Fire testing is inherently hazardous. Adequate safeguards for personnel and property shall be employed in conducting these tests.  
1.7 The following precautionary caveat pertains only to the test method portion, Section 8 of this specification. This specification 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 specification to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.  
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This specification covers the material and design requirements, and fabrication of ducts and hoods made of "fiberglass" (glass fiber reinforced thermosetting resin) consisting of a polyester, vinyl ester, or other qualified resin-matrix systems with fiber reinforcement manufactured by contact molding, intended for use in handling corrosive fumes and process gases. Special attention is given to equipment that operates at specified temperatures with regard to strength and corrosion resistance. This specification does not address the selection of resins and reinforcements for specific chemical environments.
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4.1 The results obtained by this practice shall serve as a guide in, but not as the sole basis for, selection of a thermosetting resin used in an RTP structure. No attempt has been made to incorporate into the practice all the various factors that will potentially affect the serviceability of an RTP structure when subjected to chemical environments. These factors will potentially include stress, different resin-to-glass ratios, and multiple veils.
SCOPE
1.1 This practice is designed to evaluate, in an unstressed state, the chemical resistance of thermosetting resins used in the fabrication of reinforced thermosetting plastic (RTP) laminates. This practice provides for the determination of changes in the properties, described as follows, of the test specimens and test reagent after exposure of the specimens to the reagent: hardness of specimens, weight change thickness, appearance of specimens, appearance of immersion media, and flexural strength and modulus.  
1.1.1 This practice is also useful to evaluate other factors, such as surfacing veils and the effect of resin additives, on the chemical resistance of the resin.  
1.2 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.
Note 1: There is no known ISO equivalent to this standard.  
1.3 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.  
1.4 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.

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  • Standard
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    English language
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