1. Stabilization Of Diesel Contaminant Soil With Lime And Fly Ash Admixture
Researched By
Peter G. Nicholson and Pamela R. Tsugawa
Presents By
Mr. Sarun Thanavibulsate
Mr. Thapana Thanatsang

2. Introduction Source: Diesel production Transportation
Petroleum storage
Other of petroleum product
Hazard: Effect central nervous system
Headaches
Appetite loss
Weakness

3. Lime and Fly Ash Lime Various forms of lime – Quicklime CaO
Modify many engineering properties of soil
- Pozzolanic reaction improve strength and durability
Fly Ash
By product from power plants
Used to Stabilize the soil
Short term improved the workability, reduction in PI and shrinkage
Long term improve strength due to
pozzolanic reaction

4. What is pozzalan???
Source of silica or alumina with large surface area
‘Fly Ash’ and certain soil type
Can be hydrated by earth alkali to form cementitious product
‘Pozzolanic reaction’
Lime can speed up ‘pozzolanic reaction’
Encourage cation exchange

5. Description of Sample Tested
Two groups of sample being tested
- Uncontaminated, original Soil
- Contaminated sample
- untreated
- treated with lime
- treated with Fly Ash
- Treated with both

6. Diesel concentration in soil after treatment
Diesel conc plotted vs time
Both helps to reduce diesel conc in soil
Diesel stabilization fastest when both lime and fly ash is used
Fly ash- pozzolan
Lime- speed up ion exchange

7. Unconfined soil strength after treatment
The unconfined compression test
Fly ash and lime treated clearly show most increase in strength
Cementation speeds up by
Pozzolan fly ash
Basic lime

8. Diesel concentration in leachate
Less than 1 ppm of diesel in both untreated and treated leachate
It was not detectible
However, sensory observation revealed that:
No leachate smell from treated sample
Some leachate smell from untreated sample

9. Conclusion
Lime and fly-ash combination admixture is best at stabilising diesel contaminated soil
Also improve the soil strength the most
No addition waste material to land field site
Construction possible, land reclamation
A very good alternative