Ovingham Bridge Blog

Issue 32

16 November 2015

Waterproofing the Deck

After welding the SPS deck panels (see blog 31) they are ready to receive the waterproofing system, which has

an antiskid finish.

Deck plate primed (note red colour)

The edge of the deck plates have waterproofing

applied by brush to seal the vertical edge

Method of Waterproofing

1. The SPS deck requires track blasting

which involves firing ball bearings at the

surface to remove rust and

contaminants.

2. Once blasted the deck needs to be

primed to allow the waterproof to bond

to the deck, this is done immediately

after shot-blasting.

3. The edges of the deck are then painted

with a waterproof paint, this is to seal

the vertical edges of the deck plates

(refer to photograph bottom left)

4. The main waterproofing system is then

applied over the primer.

5. Before the waterproofing cures

aggregate is spread evenly over the

surface.

6. The waterproofing and aggregate is then

sealed, and is ready to receive traffic.

(Refer to photograph bottom right)

Finished Surface with Kerbs installed,