Estimating gallons of H20 per cubic yard 1

[isutausig]

Is there a table or formula available to better estimate how many gallons of water it may take to raise the moisture content of existing soils during compaction?

 

[CarlB]

Here's the steps to calculate:

Say optimim moisture content is 12% and soils are at 8%, and maximum dry unit weight is 110 lbs/cufic foot. You need to increase moisture by (12%-8%)x110 or 4.4 lbs/cubic foot. Since there are about 8.34 lbs/gallon, you need 4.4/8.34=0.53 gallons/cf. This is per cubic foot at 100% compaction; you would need to factor lower by in place density divided by max dry density.

 

[BigH]

Suggest you check out thread on "Contractor Doesn't Want to Use Water" - some good thoughts in there by many contributors.

 

[KRSServices]

I hate to sound a little negative, but why would you want to calculate or estimate the volume of water necessary to bring the soils up to optimum? Even if water were a premium, would you not load a tanker for surface spraying if you only needed say 2,568 gallons on a 3,000 gallon truck? For me, the calculation of volume and cost of water has always been a function of the compaction process and never an issue.

I guess what I am saying is that adding the water is not a precise science, therefore you may be expending a whole lot of time in determining this calculation when in reality, it will be about as useful to the contractor as knowing the actual number of 3/4" rock in a 4-20 sample. The importance is the application and satisfaction of the specification, or the end result. I suppose it makes for an interesting exercise in theory. KRS Services

http://www.krs-services.com