FLY ASH IN EMBANKMEMT CONSTRUCTION.

It is especially attractive for embankment construction over weak sub-soils where excessive weight could cause failure.

It is found that fly ash significantly reduces the plasticity index of the organic soil, whereas the liquid and plastic limits increase. The dry density of the fly ash-soil mixture increases significantly, while the water requirement reduces due to the addition of fly ash.

 Fly ash also causes lesser pressure on retaining walls due to lower weight. Higher value of California Bearing Ratio as compared to soil provides for a more efficient design of road pavement.

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