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First introduction to Natural Cement was a water authority contract for Yorkshire Water at
Dunford Bridge near Holmfirth. The specification was for SHOTCRETE 513 due to its WAA
status. The environmental considerations were paramount, and it’s inert nature and short
curing times were fundatmental in its inclusion in the restrictive specification, which was
for slope stabilisation on a primary drinking water reservoir.

Since the successful completion of this contract, SHOTCRETE 513 has been our first choice
for dry sprayed material within enviromentally sensitive areas such as rivers or water au-
thority structures. An example of this was the limestone canal tunnels contract in Dudley,
West Midlands, where SHOTCRETE 513 was sprayed onto the roof of unstable limestone
tunnels for stabilisation. In addition, due to its water proofing and water stopping proper-
ties, it has also been utilised for areas of substrate with severe water egress such as piled
walls and tunnel linings and has proved very effective in difficult circumstances, even as
far as having been sprayed onto flowing water, all areas that would require expensive
counter measures to prevent water egress. Natural Cement is not a cheap material when
compared to standard construction grade dry spray products, but is priceless in the
previously mentioned environments

John Aveling - Managing Director
Galeforce Civil Engineering Ltd
www.galeforce.co.uk

We have used Natural Cement on two recent projects for the refurbishment of Sugar
Loaf Tunnel for Railtrack Great Western Zone and the upgrading of Winchester Tunnel
for Railtrack Eastern Zone. From our experience, the material used in sprayed con-
crete work, had very low rebound properties, high early strength and excellent adhe-
sive properties even in very wet conditions. We are very pleased to recommend the
use of the material and can confirm that it is our intention to specify this material for
use in any further refurbishment works we may have in the future.

Jack Knight Haswell Consulting Engineers

www.haswell.com

www.naturalcement.co.uk