Stabilisering av humusförorenad sand med hydrauliska och puzzolaniska bindemedel: resultat av förprovning och vägförsök: tillsättning av flygaska vid cementstabilisering av väg 1175

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Peet Höbeda
Torbjörn Jacobson
Leif Viman

Laboratory tests, to treat a sand, contaminated with an active organic substance, with different hydraulic and puzzolanic binders, are described. Portland cement gave poor results, also with activating substances. Better results were obtained with a slag binder, activated with waste gypsum, calcium chloride, or a cement-fly ash binder.

A blended cement, containing fly ash, was used to strengthen road 1175 with a plant-mixed base-course. Because of the poor immediate stability, tests were made to mix in additional fly ash (a wet, conditional material). Good results were obtained and it was possible to decrease the cement content.

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