GENERAL AND PARTICULAR SPECIFICATIONS OF ... - UNDP

5- Hand laying of any bituminous material will be
permitted only in the following
circumstances:
a. For laying regulating courses of
irregular shape and varying thickness.
b. In confined spaces where it is
impracticable for a paver to operate.
c. For footways.
6- Material shall be compacted as soon as
rolling can be effected without causing undue
displacement of the mixed material and while
this has at least the minimum rolling
temperature stated in the appropriate British
Standard. The material shall be uniformly
compacted by an 8-10 tons smooth wheel roller
having a width of roll not less than 45cm, or
by a mult-wheeled pneumatic tyred roller of
equivalent weight except that wearing course
and base course material shall be surface
finished with a smooth wheel roller.
7- The material shall be rolled in a
longitudinal carriageway over lapping on
successive passes by at a pneumatic tyred
roller, at least the nominal width of the
tyre.
8- Hand-raking of wearing course material which
has been laid by a paver and the addition of
such material by handspreading to the paved
area for adjustment of level will be
permitted only in the following
circumstances:
a- At the edges of the layers of material
and at gullies and manholes.
b- Where other wise directed by the
Engineer.
3-27
SPECIFICATIONS
EXCAVATIONS
9- Rollers shall not stand on newly laid
material while there is a risk that it will
be deformed thereby.
10- a. By heating the joint with an approved
joint heater at the time when the
additional width is being laid but
without cutting back or coating with
binder. The heater shall raise the
temperature of the full depth or the
wearing course to figure within the
rolling temperature range specified for
the material and for a width not less
than 75mm on each side of the joint. In
this case, however the Contractor shall
have available for use in the event of
breakdown, equipment necessary for
operating method (c).