Cement Modified Soil

[mlblack21]

I have a project where we are constructin roughly 100,000sf of new surface parking. The soils underneath are garbage up to 10ft in depth so undercutting and replacing with shot-rock is not a good economical solution. Does anyone have a good specification for using cement modified soil? I've heard this works really well for this type of application.

 

[Ron]

Soil-cement is a "site designed" enhancement. The design will be based on the loadings, the soil conditions and the groundwater conditions. Keep in mind that if you are putting an asphalt surface on top of the soil cement, you will get reflective cracking in the asphalt from soil cement shrinkage cracking.

 

[fattdad]

I'm not sure that the proceedures for soil-cement stabilization are effective on garbage. Interesting problem. . .

f-d

ípapß gordo ainÆt no madre flaca!

 

[cvg]

first decide what is feasible and appropriate, then develop your spec based on your site specific conditions.
assuming you do it right with normal, low w/c ratio, shrinkage cracking should not be an issue

cement modified soil
cement treated base
soil cement for paving

lime stabilization

http://www.limestabilization.com/

 

[oldestguy]

Define "garbage". When placed? If it is dumped stuff of various tapes, especially old, there may be other options, such as a rolling surcharge to compact it some. A thicket than normal base maybe. Any cement stabilization is unlikely to treat the full depth. What is parking for? The final use may be able to accept some settlements.

 

[Panars]

Cement or lime stabilization is only going to treat the upper 16 inches of soil, unless you do a lot of excavation. So I doubt cement stabilization is going to help you if the subgrade is "garbage". Basically, for really soft soil you can't do cement stabilization to easily because the soil will not support the spreading and mixing equipment. In these cases, you are probably better off excavating and replacing with shot rock and geogrid. This can then "float" the pavement and subbase above your soft soils. The design also depends on the vehicles being parked. A design for automobiles will be different than one for tractor trailers.