Angle of Internal Friction for Salt

OSUCivilengineer
(not verified)
Posted in: , on 21. Apr. 2009 - 02:35

I'm designing a salt shed that will store road salt for deicing roadways. I can't seem to find an angle of internal friction for road salt. I have an old design that listed it as 30 degrees. Loose or very loose sand would be around 30 degrees. Does someone have a number they use?

This salt will not be packed, it will simply be piled loosely with a front end loader.

Thanks

Re: Angle Of Internal Friction For Salt

Erstellt am 21. Apr. 2009 - 02:31

It depends:

(1)for coarse salts, about 42~38 degree;

(2)medium-coarse salts, about 40~36 degree;

(3)fine salts, about 36~28 degree.

OSUCivilengineer
(not verified)

Re: Angle Of Internal Friction For Salt

Erstellt am 21. Apr. 2009 - 04:44

Sounds like 30 degrees is a conservative number to use. The smaller phi is, the larger the Rankine active earth pressure coefficient.

Re: Angle Of Internal Friction For Salt

Erstellt am 21. Apr. 2009 - 05:36
Quote Originally Posted by OSUCivilengineerView Post
I'm designing a salt shed that will store road salt for deicing roadways. I can't seem to find an angle of internal friction for road salt. I have an old design that listed it as 30 degrees. Loose or very loose sand would be around 30 degrees. Does someone have a number they use?

This salt will not be packed, it will simply be piled loosely with a front end loader.

Thanks



If you are talking about the angle of repose formed in a pile then it is 32 degrees. I have worked in the salt business for over 30 years and have measured it many times.

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OSUCivilengineer
(not verified)

Re: Angle Of Internal Friction For Salt

Erstellt am 21. Apr. 2009 - 02:13

The angle of repose is totally different than the angle of internal friction. The angle of internal friction is from Rankine's earth pressure theory.