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Analysis of slow curing in deep layer of sealant
Date:2020-08-06 09:40:00 Share:
First of all, the objective conditions of sizing have a great influence on the deep curing speed. Such as the construction environment, temperature, humidity have a greater impact on the curing speed. If the temperature is too low and the humidity is too high, the deep curing will be slowed down obviously. In addition, the construction site ventilation, if the air circulation is not smooth will also affect the deep curing, in addition, the design of glue joint also has a great impact on the deep curing. When the width to depth ratio is not appropriate or the depth is too deep, the deep curing will be slow; Generally, deep curing is a little slow, and it does not affect the actual engineering use without quality problems (such as foaming, internal non curing, etc.). The curing period of the specimen specified in the national standard is 21 days, while the testing specimen is equivalent to the sizing thickness in the actual project, that is to say, the complete curing time recognized by the national standard takes 21 days, while our reaction curing time is far less than 21 days (generally speaking, the curing time is less than 21 days) In addition, we think that the sealant curing too fast is not good for long-term use, because it is not conducive to release the stress caused by the temperature during the curing process, and there are hidden dangers. If the concrete curing time is limited, if too fast, it will lead to stress concentration and cracking.