Civil Engineering Reference
In-Depth Information
Preparation
Hydro-dem-
olition + grit
blasting
Environment
Orientation
Reinforcement
Surface finish
Access
Atmospheric
Overhead
Mesh fibre
Trowelled fin-
ish no colour
match
Limited to
night working
Restricted
space
Hydro-dem-
olition + grit
blasting
Atmospheric
Vertical
Mesh fibre
Trowelled fin-
ish no colour
match
Limited to
night working
Restricted
space
Hydro-dem-
olition + grit
blasting
Atmospheric
60:40 vertical:
overhead
Mesh
Trowelled
finish colour
match (where
no surface
coating pro-
vided)
External
repairs use
scaffold, plat-
forms etc.
Hydro-dem-
olition + grit
blasting
Atmospheric
(substrate
absorbs water
at high rate)
50:50 vertical:
overhead
Mesh (replace
damaged
steel)
Trowelled
where visible,
otherwise as
shot, no colour
match
May be haz-
ardous
Hydro-dem-
olition + grit
blasting
Cool (ventila-
tion fans) can
be damp
Overhead
Mesh (replace
corroded steel)
As shot, no
colour match
Restricted
access to road
and rail tun-
nels
Pumping long
distances
Warm and
damp
Curved sur-
faces
Mesh (stain-
less steel)
As shot, no
colour match
Restricted
access through
manholes
Pumping long
distances
