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 concrete work, had very low rebound properties, high early strength and excellent adhesive 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.
Over the past few years, a number of projects have been undertaken for our company during which Natural Cement products were used. These projects have all been successfully completed within the difficult constraints of time and access which control all works on the operational railway. We are writing to express the high regard that has developed within our organisation for Natural Cement products and to record our appreciation for the high quality of service that your company provides.
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 its inert nature and short curing times were fundamental 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 environmentally sensitive areas such as rivers or water authority 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.