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what is the minimum of environmental temperature to stressing of multi strand in post tensioned bridge?

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  • what is the minimum of environmental temperature to stressing of multi strand in post tensioned bridge?


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Answer #1 | 08/02 2014 06:56
I've never seen a minimum temperature specification for tensioning, probably because tendon elongation due to tensioning force is much greater than tendon shrinkage due to temperature change. Temperature is a factor when grouting tendons after tensioning, as the grout will not properly mix or cure if the temperature is too cold. Refer to the FHWA Post-Tensioning Tendon Installation and Grouting Manual for more information: http://www.fhwa.dot.gov/bridge/construction/pubs/hif13026. pdf#page17
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Answer #2 | 07/02 2014 10:20
You may want to check VSL who is a manufacturer and installer, at www.vsl.net.
Positive: 24 %
Answer #3 | 07/02 2014 04:39
I think it depends on whether you are building the bridge in a tropical or Arctic environment.
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