Enzyme Enhanced Stabilization of Soil and Fly Ash

by Lutful I. Khan, Cleveland State Univ, Cleveland, United States,
Mohammad Sarker, Cleveland State Univ, Cleveland, United States,

Document Type: Proceeding Paper

Part of: Fly Ash for Soil Improvement


The purpose of this research was to determine if enzymes could be utilized to increased the strength and stability of soil mixed with fly ash. Samples were prepared with and without the enzyme by varying the percentages of fly ash in the soil-fly ash mixture and subjected to unconfined compression test, freeze thaw test and compaction test. The results indicted that addition of very small amount of enzyme (about 5%) increased the unconfined compression strength significantly. Enzyme stabilized soil-fly ash mixture was found to be as stable as the lime stabilized soil-fly ash mixture under freeze-thaw cycles. No change in the compaction characteristics of soil-fly ash mixture was observed because of the enzyme.

Subject Headings: Enzymes | Soil stabilization | Soil mixing | Fly ash | Compression tests | Soil strength | Recycling | Soil compression

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