Rev. 9-1-95
BITUMEN COATING FOR PILES
701-B-068
DESCRIPTION. The work shall consist
of furnishing and applying bitumen coating and primer to steel
pile surfaces in accordance with these specifications and in
reasonably close conformance with the lines and at the locations
shown on the plans or as directed.
MATERIALS. Bitumen coating shall be
canal liner bitumen in accordance with ASTM D 2521. It shall have
a softening point of 88NC to 93NC (190NF to 200NF), a penetration
of 56 to 61 at 25NC (77NF), and a ductility in excess of 35 mm
(1.38 in.) at 25NC (77NF).
Primer shall be in accordance with
AASHTO M 116.
CONSTRUCTION REQUIREMENTS. All
surfaces to be coated with bitumen shall be dry and thoroughly
cleaned of dust and loose materials. Primer or bitumen shall not
be applied in wet weather, nor when the ambient temperature is
below 18NC (65NF).
Application of the prime coat shall
be with a brush or other approved means and in a manner which
thoroughly coats the surface of the piling with a continuous film
of primer. The primer shall have set thoroughly before the
bitumen coating is applied.
The bitumen shall be heated to 149NC
(300NF) and applied at a temperature between 93NC and 149NC
(200NF and 300NF) by means of one or more mop coats or other
approved means. The average coating depth shall be 10 mm (3/8
in.). Whitewashing of the coating may be required during hot
weather as directed to prevent running or sagging of the asphalt
coating prior to driving of the pile.
Bitumen coated piles shall be
protected from sunlight or heat immediately after the coating is
applied. The bitumen coating shall not be exposed to damage or
contamination during storage, hauling, or handling. Once the
bitumen coating has been applied, dragging the piles on the
ground or the use of cable wraps around the piles during handling
will not be permitted. Pad eyes, or other suitable devices, shall
be attached to the piles to be used for lifting and handling.
A nominal length of the pile shall be
left uncoated as directed where field splices will be required.
After completing the field splice, the splice area shall be brush
coated or mop coated with a minimum of one coat of bitumen as
directed.
METHOD OF MEASUREMENT. This work will
not be measured for payment.
BASIS OF PAYMENT. No direct payment
will be made for this work. The cost of this work shall be
included in the cost of the piling specified. The cost of this
work shall include the costs of furnishing all labor, materials,
tools, equipment, and incidentals for applying the bitumen
coating and primer. If the bitumen coating is damaged, it shall
be reapplied as directed with no additional payment.