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Chemical anchor in higher service temperature

Posted by Domalmost 6 years ago
Chemical anchor in higher service temperature

Hi Guys, I am working on a special storage room which the temperature will remain a constant 48 degrees Celsius, just curious if chemical anchor is suitable under such situation?


*Posted on behalf of the customer.

chemical anchor,temperature

1 Reply
Posted by Domalmost 6 years ago

Thank you for your question regarding the effect on the performance of chemical anchor used in high temperatures.

For chemical anchors, the following temperature variables need to be considered:

Temperature at the time of installation of the following:

  • Air temperature - the product has an installation temperature range which ensures it can be dispensed. If it’s outside these guidelines, you should contact the supplier to obtain advice on how to cool or warm the chemical to the required temperature range; and


  • Base material temperature – this effects the working (or gel) time, the final full cured time and the penetration behaviour of the product. For example, the higher the temperature the less gel or working time you have and the quicker the full cure time.


Note: the relevant approved temperature ranges can be found in the ETA (European Technical Assessment) approval document for each chemical product).

 
The effect of the short term and long-term temperature of the base material on the cured product.

  • ‘Short Term’ in service temperatures are ones that vary over short intervals, e.g. Day/night cycles and freeze/thaw cycles and are within allowed temperature range.


  • ‘Long Term’ in service temperatures are temperatures within the service temperature range, which will be approximately constant over significant periods of time. Long term temperatures will include constant or near constant temperatures, such as in your case with 48 degrees Celsius.


  • For chemical anchors, the ETA provides the characteristic bond strength for the range of these service temperatures. For example, characteristic bond strength of HY 200-R in uncracked concrete under different in-service temperature range is as per Page 21 of attached ETA-12/0084 (Refer to the first Table).


  • When design using Hilti Profis anchor design software you need to indicate the short and long term temperatures, so it will utilise the correct bond strength, see the Profis graphic below for where these are located.



I hope this covers your question. If you need any further information please feel free to comment below or contact our technical centre via autechnicalcentre@hilti.com

installation,Profis anchor,curing,design bond strength,service temperature,non-ambient