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Cement bound sand (CBS)
Compliant CBS for cable installations, supplied throughout Somerset and into Devon, Dorset, Wiltshire and South Gloucestershire.

Also known as stabilised sand
Hardened fill that protects the cable
Cement bound sand is mainly used for cable installations where a hardened fill for protecting the cable is required.
Our CBS is compliant with Energy Network Association Technical Specification (ENA TS) 97-1 and National Grid Technical Specification (NGTS) 3.05.07. Certificates are available on request.
Why CBS compliance matters
Compliant CBS ensures a low thermal resistance, so the material conducts heat away from the cables that is produced during electricity transmission. The thermal conductivity around the cables is of a known value and will remain consistent for the length of the cable being installed. This allows the cable to carry the required current and be maintained at the designed capacity.
Can you use any 14:1 sand cement mix? No — not all materials have the required thermal conductivity. Our CBS is fully compliant, so you can order with confidence.
Hinkley Connection Project
We supplied CBS for the Hinkley Connection Project, where the installation of high-voltage 400kV cables under the Mendip Hills AONB was undertaken.
The advantages of cement bound sand
Where we deliver CBS
Throughout Somerset and into parts of Devon, Dorset, Wiltshire and South Gloucestershire.
Ordering cement bound sand
Call 01458 223923 or email screed@smorris.co.uk. Certificates of compliance are available on request.