Morning Everyone!
I am shortly going to be designing up 2 small circular hot tubs in reinforced concrete.
The hot tubs are located very close to each other resulting in a thin (approx 200mm) walled concrete shell. They are outdoors & buried to ground level. I am concerned with the cracking effects from the continuous heating and cooling.
An option to reduce cracking would be the inclusion of polypropylene fibres to the standard steel reinforced concrete mix for the walls and base.
Each hot tub will unfortunately be cast as 1 unit (no movement joints) due to the tight circular shape.
Does anyone have experience in this area here? If so, could you please point me in the direction of some literature which quotes the typical % to add to the mix.
Due to the high temperature variations & ofcourse that the shell is water containing, I cant use steel fibres, it will need to be polypropylene.
Any advice is GREATLY appreciated!
Many Thanks,
Scott
I am shortly going to be designing up 2 small circular hot tubs in reinforced concrete.
The hot tubs are located very close to each other resulting in a thin (approx 200mm) walled concrete shell. They are outdoors & buried to ground level. I am concerned with the cracking effects from the continuous heating and cooling.
An option to reduce cracking would be the inclusion of polypropylene fibres to the standard steel reinforced concrete mix for the walls and base.
Each hot tub will unfortunately be cast as 1 unit (no movement joints) due to the tight circular shape.
Does anyone have experience in this area here? If so, could you please point me in the direction of some literature which quotes the typical % to add to the mix.
Due to the high temperature variations & ofcourse that the shell is water containing, I cant use steel fibres, it will need to be polypropylene.
Any advice is GREATLY appreciated!
Many Thanks,
Scott
