Effect of High Temperature on Concrete Structures
Effect of High Temperature on Concrete Structures
(OP)
Can anyone supply a reference for the effect of heat on concrete structures?
We are engineering a reinforced concrete foundation for a bottom supported boiler. The boiler manufacturer has indicated to us the the temperature at the base of the boiler will be 400 deg F. The boiler sits on a steel skid (supplied by the vendor) which we plan to support with a concrete slab on grade inside a powerhouse.
We are having a debate in the office concerning what, if any, effects this will have on our proposed mat. At least one of the senior engineers has reported that he has never considered temperature in any of his previous designs. Somewhere along the line I seem to remember that there is a relationship between temperature and strength.
Any references will be appreciated.
We are engineering a reinforced concrete foundation for a bottom supported boiler. The boiler manufacturer has indicated to us the the temperature at the base of the boiler will be 400 deg F. The boiler sits on a steel skid (supplied by the vendor) which we plan to support with a concrete slab on grade inside a powerhouse.
We are having a debate in the office concerning what, if any, effects this will have on our proposed mat. At least one of the senior engineers has reported that he has never considered temperature in any of his previous designs. Somewhere along the line I seem to remember that there is a relationship between temperature and strength.
Any references will be appreciated.






RE: Effect of High Temperature on Concrete Structures
RE: Effect of High Temperature on Concrete Structures
RE: Effect of High Temperature on Concrete Structures
ACI 209R Prediction of Creep, Shrinkage and Temperature Effects in concrete structures
ACI SP-39 Behavior of concrete under temp extremes
The stuff I'm reading indicates that you have to design for the stresses caused by the concrete expansion (especially if the concrete is restrained, including any temp gradiant, but other than that the 400 deg shouldn't be a problem for the concrete.
RE: Effect of High Temperature on Concrete Structures
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RE: Effect of High Temperature on Concrete Structures
RE: Effect of High Temperature on Concrete Structures
RE: Effect of High Temperature on Concrete Structures
RE: Effect of High Temperature on Concrete Structures
http://www.slideruleera.net/PCA-Page.html
www.SlideRuleEra.net
RE: Effect of High Temperature on Concrete Structures
There are several methods to achieving a temp-resistant concrete. I suggest you chat to some helpful additive suppliers or concrete manufacturers.
RE: Effect of High Temperature on Concrete Structures
We are in the process of obtaining additional info from the ACI, and I will speak with our concrete supplier.
Thanks to all who responded to this post.
RE: Effect of High Temperature on Concrete Structures
RE: Effect of High Temperature on Concrete Structures
RE: Effect of High Temperature on Concrete Structures
RE: Effect of High Temperature on Concrete Structures
I would use a coarse aggregate that has a very low absorption (granite, river rock, etc.) so that moisture issues are reduced.
If you want to be conservative, you could use refractory concrete in the upper 6 inches or so.
RE: Effect of High Temperature on Concrete Structures
RE: Effect of High Temperature on Concrete Structures