Exposed Structural Concrete
Exposed Structural Concrete
(OP)
Hi Guys,
We have designed a one storied concrete flat slab structure for underground parking garage, the deck of which serves as a parking on top. It is in construction and contractor want to expose the slab in winter, as he can't finish in one month time. He is of opninon that protective membrane shall be applied not below -10 deg C for good bonding. I am wondering that even hair line cracks would cause the ingress of deicing agenets like salts and that is the start of deterioration of concrete, as in Toronto temp can reach below -40 deg C. Can somebody suggest, is it ok to expose the concrete uptil required temperature or is there any other method to apply protection below -20 deg C. This is a flat slab structure and cover to slab is as per code for normal exposure.
Thanks and appreciate for a practical advice.
We have designed a one storied concrete flat slab structure for underground parking garage, the deck of which serves as a parking on top. It is in construction and contractor want to expose the slab in winter, as he can't finish in one month time. He is of opninon that protective membrane shall be applied not below -10 deg C for good bonding. I am wondering that even hair line cracks would cause the ingress of deicing agenets like salts and that is the start of deterioration of concrete, as in Toronto temp can reach below -40 deg C. Can somebody suggest, is it ok to expose the concrete uptil required temperature or is there any other method to apply protection below -20 deg C. This is a flat slab structure and cover to slab is as per code for normal exposure.
Thanks and appreciate for a practical advice.






RE: Exposed Structural Concrete
RE: Exposed Structural Concrete
RE: Exposed Structural Concrete
http://www.cement.org/tech/faq_cold-weather.asp
http://www.nrmca.org/aboutconcrete/cips/27p.pdf
RE: Exposed Structural Concrete
It is difficult to change the tendered items. It is safe to expose concrete for three or four months of exposure to hardened concrete as normally exposed to slab on grades etc.
RE: Exposed Structural Concrete
The joy of living in a cold climate. Oh well, apparently global warming is on the way.
RE: Exposed Structural Concrete
RE: Exposed Structural Concrete