Page 234 - 360.revista de Alta Velocidad - Nº 5

López-Bachiller Fernández, Miguel. Sampedro Rodríguez, Ángel. Díaz Minguela, Jesús.

world of the construction of the public works with regard to its functioning, characteristic
works, improvements that provide, cost, availability in the environment of the works, tests that
should be carried out to control quality, etc, what is without a doubt a great advantage over
other possible new materials based on polymers from petroleum or other sources.

Photo 1 Drying the platform

Each binder works in a certain way, has different advantages and their employment is not
normally function of its price at each site, but the quality of soil which have to stabilize.
Briefly, when we operate with lime we produce a chemical reaction with clays, so that it breaks
the laminated structure, which provides a great absorption of water, "soapy" appearance to
glide particles on other, turning it in something more Sandy in appearance, which it decreases
absorption of water, structure pass from SOAP to granular and increase significantly the capacity
to support, obtaining CBR values from to 2 or 3, to values 20 or 30 with small additions of lime,
usually around 2% lime, usually in the form of quicklime.
Lime cannot react with granular materials and not plastic materials so that its effect is clearly
diminished and therefore is not recommended in these materials.
However cement works sticking mineral particles as stable and long‐lasting glue, inferring
materials treated with a greater resistance to getting excellent rigidity in time relatively short
but also controllable through the type of cement, the endowment or additives that could be
added.
In any way at any time one could speak of rigid or flexible solutions, but simply solutions to the
type of soil that can be used on platforms already built and different ways of adapting them to
the function to be fulfilled according to the dimension or the site where this soils have been
placed.
The only restrictions you have to use this technique are to avoid any chemical reaction in the
soil with the binders added that may produce some material that evolves with the passage of
time in a bad way. It is known that this effect may occur when there is enough ion sulfate (SO3)

232 360.revista de alta velocidad