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Quicklime (and especially
low-dust lime) is used to dry out damp soils and to improve the clay
soils used in earthworks. Lime is also increasingly used to recycle
excavated material (trench spoil) from sites in urban areas.
A recent application of lime is the use of hydrated lime in the cement
filler which consolidates underground works such as tunnels.
Hydrated lime also improves the performance of the asphalt mixes used
for road surfacing. It increases their resistance to stripping, rutting
and age-hardening.
In the
presence of water, quicklime spontaneously hydrates to form calcium
hydroxide. The heat released in this reaction is also used to dry out
damp soil rapidly. Moreover, lime neutralizes the clay particles in
the soil and binds strongly with them to durably improve the
mechanical performance of the treated soils, bringing better
resistance to traffic and adverse weather conditions.
These properties allow embankments, platforms and pavement layers for
roads, railway tracks, airports, warehouses, etc. to be constructed
using local soils and at low cost both financially and
environmentally.
Always striving to make the user's job easier, as well as making it
possible to treat soil in urban areas, Niki Lime has developed
products with
a very low dust emission quicklime.
In tunnel construction,
hydrated lime is used as a component to improve the rheology of
mortars. Furthermore, quicklime dries out the rotary mud which comes
from the excavation process and thus makes handling easier.
In injection works, hydrated lime is one of the components used in the
definition of the injection binders.
Quicklime is also used in the deep soil stabilisation process (lime
treated columns) to improve soft soils, reduce settling and increase
stability.
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Chemical