Information on the most widely used ASTM standards within the materials testing industry
Jan. 18, 2026
In the field of construction, the construction adhesive as a connection of different building materials, its performance on the overall quality of the building, tensile bond strength as one of the measures of the performance of the building adhesive, the pull-out testing machine is suitable for dry-mix mortar, thermal insulation materials, ceramic wall and floor tile adhesives, multilayer building coatings, putty for building exterior walls of tensile and bond strength test, the testing machine has a beautiful appearance, delicate technology, and a servo control system, which can achieve high efficiency and stability of uniform loading. Adopt touch screen control, friendly human-machine operation interface. The instrument is equipped with stroke limit and positive and negative force value overload protection functions. It has the characteristics of adjustable test speed, high load measurement accuracy, and easy operation.
Test equipment and materials:
| (1) Test equipment | |
| It needs to have sufficient range and high precision to test the tensile strength of construction adhesives. For example, a testing machine with a range of 0 - 10kN and an accuracy of ±1% is available to ensure accurate measurement of the pull-out force of adhesives of different strength classes. | |
Fixture:
| It should be specially designed according to the shape and size of the test sample to ensure that the specimen is firmly installed, and there will be no loosening or falling off during the test, and the tensile force can be evenly applied to the specimen. For square test blocks, suitable square fixtures can be used. |
| High-precision sensors: | Equipped with force sensors with an accuracy of not less than ±0.5% and displacement sensors with an accuracy of not less than ±0.1mm, they are used to accurately collect tensile force and displacement data in real time, providing a reliable basis for subsequent data analysis. |
| (2) Test materials | |
| Construction adhesive to be tested | Ensure that the adhesive sample is representative, within the specified storage period, and the performance meets the requirements of the corresponding product standards. |
| Standard test blocks | Prepared according to relevant standards, such as commonly used square cement mortar test blocks with a side length of 100mm or other material test blocks that meet specific engineering requirements, their dimensional accuracy, strength and other properties must meet the test standards. |
3. Test steps
(1) Preparation of specimens
The construction adhesive to be tested is evenly applied to the surface of the standard test block according to the prescribed process, and the application thickness is generally controlled within a certain range, such as 2-3mm.
Bond another standard test block with the adhesive in the prescribed way to ensure that the test block is accurately positioned and tightly fitted during the bonding process, and avoid defects such as misalignment and hollowing.
According to the characteristics of the adhesive and the requirements of the standard, the bonded specimens are cured. For example, cementitious adhesives typically need to be cured for a certain period of time under standard curing conditions (temperature 20°C±2°C, relative humidity above 95%), such as 7d, 14d, or 28d.
(2) Specimen installation
The cured specimen is carefully installed on the clamp of the pull-out testing machine, and the position of the specimen is adjusted to ensure that its center coincides with the tensile axis of the testing machine, and the installation is firm and well aligned to prevent inaccurate test results caused by installation deviations.
Check whether the connection between the components of the testing machine is stable and whether the sensors and data acquisition systems are working properly to ensure that the test is ready.
(3) Test process
Set the test parameters in the testing machine control system, the pulling speed is generally set to 1mm/min, and the continuous loading mode is used to simulate the force situation in actual use.
Start the pull-out testing machine, the testing machine begins to apply tensile force to the specimen at a set speed, and the tester needs to closely observe the state of the specimen and record the force and displacement data in real time through the data acquisition system.
When the specimen is damaged, the testing machine automatically stops loading, records the maximum tensile force value at this time, and observes the failure mode of the specimen, such as the failure of the bonding surface, the cohesive failure of the adhesive or the failure of the substrate of the test block.
4. Data recording reference:
| Test part number | Block Size (mm) | Maximum Pulling Force (N) | Displacement (mm) | Destruction mode |
| 1 | 100×100 | 4800 | 0.85 | Bond surface failure |
| 2 | 100×100 | 5250 | 0.92 | Adhesive cohesion failure |
| 3 | 100×100 | 4980 | 0.88 | Bond surface failure |
| 4 | 100×100 | 5020 | 0.90 | Adhesive cohesion failure |
| 5 | 100×100 | 5100 | 0.91 | Adhesive cohesion failure |
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