Determining whether a particular climate requires air-entrained concrete per ACI 318-14

[jochav52802]

Hello All,

I've got an outdoor concrete project near Los Angeles, CA and am trying to determine if air-entrained concrete is required based on ACI 318-14.

I'd appreciate help with understanding how other Engineers typically determine if a particular climate qualifies for needing freeze protection. For instance, is there a particular climatic organization/website and climatic data that are typically used/recognized to make this determination?

Another related question is if the geotechnical report calls for a frost depth, (in my case, only 6"), is that sufficient reason to consider the area as being subject to freezing?

I'd appreciate any support you can provide, thank you!

 

[dik]

I'd use it for improved workability... in these environs almost all concrete except for interior SOG stuff is air-entrained.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[jochav52802]

Thank you dik,

Our contractor selected the mix and has indicated that it has sufficient workability.

 

[dik]

As far as the area with 6" of frost penetration... here we have 6' and most outside concrete is air-entrained. Best to talk to someone local... a concrete supplier would be a good choice.

Rather than think climate change and the corona virus as science, think of it as the wrath of God. Feel any better?

-Dik

 

[KootK]

I would normally take the geotechnical report mention of a "frost depth" as indicative of a need for air entrainment.