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Re: Hydrocarbon encapsulation

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Dear Gail:
Mixing the portland into the soil will increase its trafficability but it is highly unlikely that this percentage will bind the hydrocarbons into the soil mixture.  It will likely slow them down but migration will occur.
John Schenne, PE
Schenne & Associates
----- Original Message -----
Sent: Sunday, February 17, 2002 7:12 PM
Subject: Hydrocarbon encapsulation

Not a structual engineering issue per se,  but does anyone know what happens when you mix hydrocarbons with portland cement?

Specifically,  if I have soil containing hydrocarbons (benzene, etc.)  and I mix in 7% portland cement by weight of the soil,  1 -2 % bentonite and water in the ratio of 1 to 0.8 cement,  will I create a soild mass that will prevent the hydrocarbons from going anywhere?

Is this is an accepted technique for this purpose?  

If I later decide to build a building on the site,  how hard will it be to excavate this material?  Can it be done with an excavator and dozer?

Gail Kelley