Chemical Subgrade Stabilization
Chemical Subgrade Stabilization
(OP)
Do you consider the blending of flyash, portland cement or lime into a subgrade for a building pad a form of chemical stabilization? Just an informal poll. . . .
f-d
f-d
¡papá gordo ain’t no madre flaca!





RE: Chemical Subgrade Stabilization
RE: Chemical Subgrade Stabilization
RE: Chemical Subgrade Stabilization
RE: Chemical Subgrade Stabilization
RE: Chemical Subgrade Stabilization
RE: Chemical Subgrade Stabilization
RE: Chemical Subgrade Stabilization
f-d
¡papá gordo ain’t no madre flaca!
RE: Chemical Subgrade Stabilization
Yes, depending on the fly ash type, you could just use between 10 to 15% fly ash to stabilize a subgrade soil or for embankment construction. The reaction of the stabilization depends on many factors suh as: water content on the mixture, amount of fly ash, soil type, clay minerallogy, etc.
RE: Chemical Subgrade Stabilization
RE: Chemical Subgrade Stabilization
RE: Chemical Subgrade Stabilization
► 'modification' = short-term improvement, reduce moisture content.
► 'stabilisation' = long term strength gain and formation of cementitious product.
However when we talk about remediation, we use similar names for two distinct processes defined as stabilisation and solidification but they 'mean' something quite different.
For remediation:
► substitute stabilisation for solidification [solidify material].
► stabilisation is now the chemical binding of a contaminant to the soil thus preventing leachate etc...
Therefore when considering remediation, a stabilised soil may not have good geotechnical properties, strength, stiffness, deformation resistance etc...This confusion of terminology is currently under review, but it highlights the importance of understanding what is meant by the various terms, chemical stabilisation may not mean an improvement in strength, but a binding of a contaminant using a binder.