Natural Cement has released Shotcrete AS90, a shotcrete that starts setting in just 60 seconds and has a setting time of just 90 seconds.
It is a fast setting and curing rapid strength gain dry spray concrete that is resistant to chloride penetration. No curing is necessary and as soon as it sets it can be coated, covered or painted making it an excellent product to use on jobs where working time is limited. It has excellent resistance to pure water, sulphated water, seawater and de-icing salts which makes it perfect for use in wet conditions or anywhere where water penetrates or flows.
Shotcrete AS90 has many uses such as:
• Stopping ingress of water.
• Tunnel repairs.
• Retaining wall repair.
Shotcrete 530 Holds Water At Welsh Mine
Water Energy, the owners of the Aberpergwm mine in South Wales, tasked Natural Cement Distribution with the problem of stopping water dripping from the roof of the drift onto a new man rider belt.
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The drift is supported using steel TH ribs with corrugated metal sheets placed behind. The water ingress occurred between the metal sheets and around the steel ribs, in many cases this was quite substantial, whereas in other areas it was only continuous drips.
Following a thorough inspection of the problem by Dale Whittaker of SES and Phil Richardson of Natural Cement Distribution, it was decided that the best course of action would be the application of Natural Cement’s fast setting spray applied product, Shotcrete 530.
To deal with the problem where there was an excessive amount of water ingress it was decided that Shotcrete AS 90, a product that sets in 90 seconds would be needed.
Shotcrete AS 90 is a newly developed Shotcrete. Like all the Natural Cement Distribution products, it is based on natural cement and, due to its formulation, has exceedingly fast setting capabilities, starting to set in 60 seconds and becoming totally set in 90 seconds.
According to a colliery representative, sprayed shotcrete was applied from 410m to 425m down the drift. The first 5m was applied 20mm thick as to plan. In this area there were not a lot of drippers and they were stopped by the shotcrete. Further application was made at this thickness with good results.
Natural Cement Receives Award
Natural Cement has been awarded ISO 9001:2008 for the Manufacture and Distribution of Cement Products. The British Assessment Bureau carried out the assessment and a certificate was awarded for meeting all the requirements of the management system.
To find out more information about Natural Cement, visit http://naturalcement.co.uk/
