Civil Engineering Reference
In-Depth Information
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Prestressed concrete poles are made of two main materials: concrete
and steel reinforcement. This chapter provides information on the appli-
cable standards and specifi cations of the various components and mechan-
ical properties of the materials. Additional material components for
grounding, climbing, and attachments are also discussed.
Cement
Portland cement should conform to ASTM C150 (ASTM 2011c).
Coarse and Fine Aggregate (Sand)
Aggregate should conform to ASTM C33 (ASTM 2011b). Maximum
size aggregate should be 3/4 in., and not exceed three-fourths of the clear
spacing between reinforcing steel and pole surface.
Admixtures
Water reducing, retarding, and accelerating admixtures should conform
to ASTM C494 (ASTM 2011a).
Water
Water should be free from foreign materials in amounts harmful to
concrete and embedded steel.
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