LENGTHENING THE ASSUAN DAM.
The Assuan dam in Upper Egypt will be strengthened in an unusual manner, according to the Engineering supplement of the London Times. The extremely high temperature in the sun during the summer months causes much expansion of the masonry, and it is considered impossible to bond new masonry into the existing work which, during the past few years, has cooled down to a fairly average temperature, so far as its interior is concerned. The strengthening will, therefore, be attained by the construction of an independent mass of masonry free to contract until it assumes the same temperature as the older mass, when it will be bonded to the latter by cement grout and steel rods previously built into the work. It is stated in the journal mentioned that all theoretical conditions will be complied with by the adoption of this ystem of construction and the strengthened dam will support two and a half times the quantity of water which the present dam furnishes, without increasing the stress upon the masonry or reducing the factor of safety in any respect. The work has already been started and it is expected that it will last about five years.
The Assuan dam in Upper Egypt will be strengthened in an unusual manner, according to the Engineering supplement of the London Times. The extremely high temperature in the sun during the summer months causes much expansion of the masonry, and it is considered impossible to bond new masonry into the existing work which, during the past few years, has cooled down to a fairly average temperature, so far as its interior is concerned. The strengthening will, therefore, be attained by the construction of an independent mass of masonry free to contract until it assumes the same temperature as the older mass, when it will be bonded to the latter by cement grout and steel rods previously built into the work. It is stated in the journal mentioned that all theoretical conditions will be complied with by the adoption of this ystem of construction and the strengthened dam will support two and a half times the quantity of water which the present dam furnishes, without increasing the stress upon the masonry or reducing the factor of safety in any respect. The work has already been started and it is expected that it will last about five years.
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