Never
use Desert sand for construction.
Desert
sand usually contains high amounts of salt, which is very bad for concrete as
it will rust the steel reinforcement, and also severely affects the strength of
the concrete.
Desert
sand grains are finer and smoother so their surface chemistry would not be able
to offer sufficient number of multi-directional chemical linkages. If their
grain size is too small, the slurry slip and the concrete would have poor
strength.
Desert
sands possess an open structure, and there is little interlock between sand
grains. If this sand is kept dry, these bonding bridges provide considerable
bearing strength. But if the sand becomes wet, the bridges soften and when
overloaded, the bridges break and collapse.
Desert sand can be used in the
following cases:-
There
are some researchers focusing on this sand in China recently.
Yes
you can use it in concrete provided it satisfies the requirements (standards
and specifications). You should test for grading, fineness, absorption and
deleterious substances.
Where
there are no other options and in areas where there is a lot of it, then desert
sand may be used, but it will lead to concrete with poor strength. For some
applications, this may not be a problem.
Yes
you can use it in concrete provided it satisfies the requirements (standards
and specifications). You should test for grading, fineness, absorption and
deleterious substances.
There
are some high quality desert sands that can be used in construction. However,
extra fineness may be a problem in the workability but advantageous in
stability and cohesion
You
can use it if you mix it with other sizes to bring the mixture within the
acceptable limits. You also need to wash it to remove dust and check its
chloride and sulfate contents if the desert is close to the sea.
Differences between:
Whole Circle Bearing vs Quadrantal Bearing
Lintel level vs Sill level vs Plinth level
Construction Joint vsExpansion Joint
Site Engineer vs SiteSupervisor
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