الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
Unpaved roads are considered the largest source of particulate air
pollution in Egypt, especially in new settlements, where roads network is still
under construction as well as secondary roads and farms roads. According to the
Environmental Protection Agency, unpaved roads produce almost five times as
much particulate matter as construction activities and wind erosion, which are the
next two largest sources, combined.
Many local governments do some sort of dust control. This maintenance
task is usually performed as a result of public complaints, and the resultant work
consists of doing some sort of dust control in front of residences. This study
comes to highlight the importance of applying dust control on unpaved roads in
Fayoum using magnesium chloride to preserve the quality of the unpaved roads.
Magnesium chloride (MgCl2) is a naturally occurring material and is
extracted from salt-water solutions. The Egyptian salts and minerals company,
Fayoum, Egypt is doing this task as those found in seawater. To extract the
magnesium chloride brine, water is removed from the salt water by solar
evaporation. Magnesium chloride can be adapted and designed to provide highest
efficiency depending on prevailing dust conditions, anticipated traffic, and type
of soil in Fayoum roads. Dilution can also be varied to obtain the greatest
possible economy and minimize environmental impact. The effect of MgCl2 on
the physical and mechanical properties of soils was evaluated in the laboratory as
well as at site. This study is to examine the possibility of using dust control by
MgCl2 as a necessary routine maintenance for all unpaved roads not only to
prolong road life, but also to protect the environment.