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Abstracted in databases:
Thomson SCIE: Science Citation Index ExpandedTM (Web of
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TRIS/TRIS Online, VINITI, CSA's ERD, CSA/ASCE (CSA's TRD), SCOPUS (Elsevier Database)
2015 Impact Factor: 0.519 ©2015 Thomson Reuters, 2015 Journal
Citation Report®
ISSN 1822-427X print
ISSN 1822-4288 online
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"The Baltic Journal of Road and Bridge Engineering"
Vilnius: Technika, 2011, Vol VI, No 4, p.
274-282 |
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Alfredas Laurinavičius, Romas
Mažeika, Rasa Vaiškūnaitė, Gintautas Brimas, Šarūnas
Milašius |
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Possibilities for the Use of
Chemicals Materials Alternative to Chlorides for
Decreasing Road Slipperiness in Winter |
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DOI: 10.3846/bjrbe.2011.35 |
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Having assessed in various aspects the study
materials (salts), used for road maintenance in a
cold period of the year, and taking a special
consideration of the impact of these materials
(salts) on the environment as well as their price,
it could be stated that the most acceptable
alternative for Lithuania is the already used sodium
and calcium chloride salts. A large disadvantage of
two materials (sodium chloride and calcium chloride)
is that chloride ions strongly increase the speed of
corrosion reactions of metals. Larger concentrations
of chlorides aggravate vegetation processes and,
thus, cause damage to roadside plants. Having
assessed all the materials (salts) according to
their chemical and physical properties and also
according to their price and availability from
technological point of view in the production, at
present the following compounds could be
distinguished: carbamide and calcium magnesium
nitrates. When using calcium nitrate fewer chlorides
get into the environment and the environment is less
corrosive in regard to metals, however, here another
problem occurs. If too large concentrations get into
the environment, nitrates can cause pollution of
ground water and soil. In future, having expanded
the production of calcium and magnesium nitrates, it
will be possible to start producing certain
mixtures, e.g. carbamide with those nitrates or the
mixture of carbamide, calcium, magnesium nitrates
and calcium chloride, and, thus, to reduce a direct
use of chlorides. |
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Keywords:
winter road maintenance, decrease of slipperiness,
calcium nitrate.
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