Standard for shear test of adhesives:
Test method for torsional shear strength of GB/T14903-1994 inorganic adhesives
1, test pieces:
The roughness of the surface of the specimen should be Rz300, and the shape, size and tolerance of the specimen should be in accordance with the standard.
2. Sample preparation:
2.1 The pretreatment method of bonding surface, the proportion of adhesives, coating and sample preparation process, if no special requirements, should be determined according to the adhesives process specification.
2.2 The cylindrical and cylindrical specimens with torsion shafts are sleeved and filled with adhesive in the clearance of the fitting. The outer cone of the cylindrical specimen shank with torsion shank and the inner cone of the end of the cylindrical specimen hole with torsion shank are used as the positioning surface of the mating surface, and the positioning surface of the positioning surface is not coated with adhesive, and the center positioning fixture of the specimen is not required.
3. When the specimen solidifies, it should be placed vertically, and the cylindrical specimen with torsion handle should be placed at the lower end of the vertical direction.
3. Sample size:
In general, the number of samples is not less than 5.