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Can adhesive steel glue and planting steel bar glue be used interchangeably?
Date：2020-08-02 09:40:00
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Reinforcement planting glue and steel bonding glue are common reinforcement materials in the field of engineering reinforcement. Their common points are as follows: modified epoxy resin is used as the main raw material with paste shape, which is used for bonding between concrete and steel. Therefore, some engineers do not understand the essential difference between them, and even replace each other.
For this reason, the small editor reminds the majority of users: planting steel bar glue and steel glue can not be replaced with each other, because they are very different in colloidal properties, testing environment and so on.
The colloidal properties are different
The adhesive is a kind of structural adhesive for post anchoring. Its colloidal properties emphasize splitting tensile strength, flexural strength and compressive strength.
Steel adhesive is a kind of structural adhesive which can bond steel plate and concrete. Its colloidal properties emphasize tensile strength, elastic modulus and elongation.
Performance demonstration of planting bar glue
The tensile strength can ensure that the glue will not be destroyed quickly under a certain tension. Under the condition of a certain modulus of elasticity, the greater the tensile strength, the greater the elongation. The larger the tensile modulus of elasticity can ensure that the colloid will not deform very easily. The elongation is the most important part of the steel glue, because the steel glue will transfer the force to the steel plate, so it is necessary to ensure that Only when the elongation of steel glue is close to the yield elongation of steel plate can this be achieved.
Different environments for testing bond strength:
In "technical code for safety appraisal of engineering structural reinforcement materials" (GB 50728-2011), there are obvious requirements and differences in the bond capacity and test standards of planting steel bar glue and steel glue. For planting steel bar glue, when testing its bonding capacity, it is necessary to conduct pull-out test on ribbed steel bar under constraint conditions, but there is no such rule for steel glue.
There is no trivial matter in the structural safety, so the construction must be carried out in strict accordance with the specification requirements in the project reinforcement construction.
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