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: D1144 - 99 (Reapproved 2021) INTERNATIONAL Standard Practice for Determining Strength Development of Adhesive Bonds1 This standard is issued under the fixed designation D1144; 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 (s) indicates an editorial change since the last revision or reapproval. 3. Terminology 1. Scope 3.1 Definitions-Several terms in this practice are defined in 1.1 This practice covers the determination of the strength accordance with Terminology D907. development of adhesive bonds when tested on a standard specimen under specified conditions of preparation and testing. 3.2 Definitions of Terms Specific to This Standard: It is applicable to adhesives in liquid or paste form that require 3.2.1 activator, or accelerator (surface), nan adhesive curing at specified conditions of time and temperature or curing agent that is applied to a bonding surface for the purpose specific substrate preparation. It is intended primarily to be of affecting or speeding, or both, the cure of an adhesive. used with metal-to-metal adherends; however, plastics, woods. 3.2.2 fixture time (set time), n-the shortest time required by glass, or combinations of these may be substituted. an adhesive to develop handling strength such that test speci- mens can be removed from fixtures, unclamped, or handled 1.2 The values stated in SI units are to be regarded as the without stressing the bond, thereby affecting bond strength. standard. The values given in parentheses are for information 3.2.3 handling strength, na low level of strength initially only. obtained by an adhesive that allows specimens to be handled 1.3 This standard does not purport to address all of the moved, or unclamped without causing disruption of the curing safety concerns, if any, associated with its use. It is the process or affecting bond strength. responsibility of the user of this standard to establish appro- priate safety, health, and environmental practices and deter- 4. Significance and Use mine the applicability of regulatory limitations prior to use. 4.1 This practice contains suggested provisions for report- 1.4 This international standard was developed in accor- ing strength values. Any ASTM test method for determining dance with internationally recognized principles on standard- strength properties of adhesive bonds may be used. This ization established in the Decision on Principles for the practice is not intended to determine the pot or working life of Development of International Standards, Guides and Recom- two-component epoxy of similar type adhesives. Refer to mendations issued by the World Trade Organization Technical Practice D1338. It should be noted that there are adhesives Barriers to Trade (TBT) Committee. whose testing requires special techniques and whose properties are difficult to reproduce from tester to tester. These variables 2. Referenced Documents should be kept in mind when analyzing the data obtained using 2.1 ASTM Standards:2 this practice. D907 Terminology of Adhesives D1002 Test Method for Apparent Shear Strength of Single- 5. Test Specimens Lap-Joint Adhesively Bonded Metal Specimens by Ten- 5.1 It is suggested that lap-type shear specimens in accor sion Loading (Metal-to-Metal) dance with Test Method D1002, be used. Other types of test D1338 Practice for Working Life of Liquid or Paste Adhe- specimens may be used with agreement between the manufac- sives by Consistency and Bond Strength turer and the purchaser. 6. Preparation o