ASTM D7966/D7966M-16

Standard Test Method for Resistance to Creep of Adhesives in Static Shear by Compression Loading (Wood-to-Wood)

SIGNIFICANCE AND USE
5.1 This test method evaluates the performance of the adhesive in laminated wood as measured by resistance to creep under static load.  
5.2 Test results from the evaluation of adhesive creep resistance, under designated environmental conditions of the test, provide a measure of the adhesive’s ability to withstand constant loading over a relatively long period of time.  
5.3 Creep measured with this test method is normally used in conjunction with specifications such as, but not limited to Specification D2559 and CSA O112.9 to confirm suitability of an adhesive to resist creep under designed loads when subjected to specific levels of stress, load duration and environmental conditions.
SCOPE
1.1 This test method covers the determination of creep properties of structural adhesives in wood-to-wood bonds when a standardized specimen is subjected to shearing stresses at various levels of static load, constant temperature, and relative humidity. Apparatus and procedures are provided for shear deformation (creep) of adhesive bonds under static load. This test method is used under the indicated conditions to evaluate resistance to creep properties of a structural wood adhesive.  
1.2 The test method is used to evaluate creep performance of adhesives suitable for the bonding of wood, including treated wood, into structural wood products for general construction, marine use, or for other uses where a high-strength general construction, creep-resistant, durable adhesive bond is required. Individual block shear specimens are prepared from adhesively bonded laminations, subjected to a constant load under various combinations of temperature and relative humidity, and the amount of creep measured.  
1.3 Creep of structural wood adhesives as measured by this test method may not be comparative to other ASTM methods and is limited to the conditions of the test and procedures contained herein.  
1.4 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 non-conformance with the 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 and health practices and determine the applicability of regulatory limitations prior to use.

General Information

• Status: Historical
• Publication Date: 30-Apr-2016
• ICS: 79.060.01 - Wood-based panels in general
• ICS: 83.180 - Adhesives
• Technical Committee: D14 - Adhesives
• Drafting Committee: D14.30 - Wood Adhesives

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: D7966/D7966M − 16
Standard Test Method for
Resistance to Creep of Adhesives in Static Shear by
1
Compression Loading (Wood-to-Wood)
This standard is issued under the fixed designation D7966/D7966M; 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 test method covers the determination of creep 2.1 ASTM Standards:
properties of structural adhesives in wood-to-wood bonds D905 Test Method for Strength Properties of Adhesive
when a standardized specimen is subjected to shearing stresses Bonds in Shear by Compression Loading
at various levels of static load, constant temperature, and D907 Terminology of Adhesives
relative humidity. Apparatus and procedures are provided for D1101 Test Methods for Integrity of Adhesive Joints in
shear deformation (creep) of adhesive bonds under static load. Structural Laminated Wood Products for Exterior Use
This test method is used under the indicated conditions to D2395 Test Methods for Density and Specific Gravity (Rela-
evaluate resistance to creep properties of a structural wood tive Density) of Wood and Wood-Based Materials
adhesive. D2559 Specification for Adhesives for Bonded Structural
Wood Products for Use Under Exterior Exposure Condi-
1.2 The test method is used to evaluate creep performance
tions
of adhesives suitable for the bonding of wood, including
D4442 Test Methods for Direct Moisture Content Measure-
treated wood, into structural wood products for general
ment of Wood and Wood-Based Materials
construction, marine use, or for other uses where a high-
E4 Practices for Force Verification of Testing Machines
strength general construction, creep-resistant, durable adhesive
3
2.2 Other Document:
bond is required. Individual block shear specimens are pre-
CSA O112.9 Evaluation of Adhesives for Structural Wood
pared from adhesively bonded laminations, subjected to a
Products (Exterior Exposure)
constant load under various combinations of temperature and
2.3 ASTM Adjuncts:
relative humidity, and the amount of creep measured.
4
Compression-Shear Creep Test Apparatus
1.3 Creep of structural wood adhesives as measured by this
test method may not be comparative to other ASTM methods
3. Terminology
and is limited to the conditions of the test and procedures
3.1 Definitions: Many terms in this test method are defined
contained herein.
in Terminology D907.
1.4 The values stated in either SI units or inch-pound units
3.1.1 laminated wood, n—the fabricated product resulting
are to be regarded separately as standard. The values stated in from the bonding of two or more laminations, with each
each system may not be exact equivalents; therefore, each
lamination made from one or more pieces bonded either
system shall be used independently of the other. Combining lengthwise, edgewise, or both, and all with the direction of the
values from the two systems may result in non-conformance
grain essentially parallel, to form a larger piece such as a
with the standard. structural member.
3.1.1.1 Discussion—Laminated wood as defined in D1101.
1.5 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the 3.1.2 stress, n—the force exerted per unit area at a point
responsibility of the user of this standard to establish appro-
within a plane.
priate safety and health practices and determine the applica-
3.2 Definitions of Terms Specific to This Standard:
bility of regulatory limitations prior to use.
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
1
This test method is under the jurisdiction of ASTM Committee D14 on Standards volume information, refer to the standard’s Document Summary page on
Adhesives and is the direct responsibility of Subcommittee D14.30 on Wood the ASTM website.
3
Adhesives. Available from APA – The Engineered Wood Association, 7011 S.19th St.,
Current edition approved May 1, 2016. Published June 2016. Originally Tacoma, WA 98466-5333, www.apawood.org.
4
approved in 2014. Last previous edition approved in 2014 as D7966/D7966M – 14. Available from ASTM International Headquarters. Order Adjunct No. ADJ-
DOI: 10.1520/D7966_D7966-16. ADJD4680. Original adjunct produced in 1987.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7966/D7966M − 16
3.2.1 average creep of specimen, n—calculated creep dis- 5.2 Test results from the evaluation
...

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: D7966/D7966M − 14 D7966/D7966M − 16
Standard Test Method for
Resistance to Creep of Adhesives in Static Shear by
1
Compression Loading (Wood-to-Wood)
This standard is issued under the fixed designation D7966/D7966M; 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 test method covers the determination of creep properties of structural adhesives in wood-to-wood bonds when a
standardized specimen is subjected to shearing stresses at various levels of static load, constant temperature, and relative humidity.
Apparatus and procedures are provided for shear deformation (creep) of adhesive bonds under static load. This test method is used
under the indicated conditions to evaluate resistance to creep properties of a structural wood adhesive.
1.2 The test method is used to evaluate creep performance of adhesives suitable for the bonding of wood, including treated
wood, into structural wood products for general construction, marine use, or for other uses where a high-strength general
construction, creep-resistant, durable adhesive bond is required. Individual block shear specimens are prepared from adhesively
bonded laminations, subjected to a constant load under various combinations of temperature and relative humidity, and the amount
of creep measured.
1.3 Creep of structural wood adhesives as measured by this test method may not be comparative to other ASTM methods and
is limited to the conditions of the test and procedures contained herein.
1.4 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 non-conformance with the 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 and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
D905 Test Method for Strength Properties of Adhesive Bonds in Shear by Compression Loading
D907 Terminology of Adhesives
D1101 Test Methods for Integrity of Adhesive Joints in Structural Laminated Wood Products for Exterior Use
D2395 Test Methods for Density and Specific Gravity (Relative Density) of Wood and Wood-Based Materials
D2559 Specification for Adhesives for Bonded Structural Wood Products for Use Under Exterior Exposure Conditions
D4442 Test Methods for Direct Moisture Content Measurement of Wood and Wood-Based Materials
E4 Practices for Force Verification of Testing Machines
3
2.2 Other Document:
CSA O112.9 Evaluation of Adhesives for Structural Wood Products (Exterior Exposure)
2.3 ASTM Adjuncts:
4
Compression-Shear Creep Test Apparatus
3. Terminology
3.1 Definitions: Many terms in this test method are defined in Terminology D907.
1
This test method is under the jurisdiction of ASTM Committee D14 on Adhesives and is the direct responsibility of Subcommittee D14.30 on Wood Adhesives.
Current edition approved Nov. 1, 2014May 1, 2016. Published March 2015June 2016. Originally approved in 2014. Last previous edition approved in 2014 as
D7966/D7966M – 14. DOI: 10.1520/D7966_D7966-14.10.1520/D7966_D7966-16.
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.
3
Available from APA – The Engineered Wood Association, 7011 S.19th St., Tacoma, WA 98466-5333, www.apawood.org.
4
Available from ASTM International Headquarters. Order Adjunct No. ADJADJD4680. Original adjunct produced in 1987.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7966/D7966M − 16
3.1.1 laminated wood, n—the fabricated product resulting from the bonding of two or more laminations, with each lamination
made from one or more pieces bonded either lengthwise, edgewise, or both, and all with the direction of the grain essentially
parallel, to form
...