Product category:
Materials
News Release from: Instarmac Group | Subject: Ironwork Reinstatement system
Edited by the Buildingtalk Editorial
Team on 02 August 2005
Jury find in favour of Ultracrete
Jury find in favour of the Ultracrete Ironwork Reinstatement system
Like most Authorities, Wakefield Metropolitan District Council suffers from failing manholes, particularly when they are located directly in the wheel tracks of heavy goods vehicles (HGVs) Many factors influence manhole failure
This article was originally published on Buildingtalk on 2 May 2005 at 8.00am (UK)
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In addition to a high proportion being installed in vehicle wheel tracks, traffic volume has increased by over 135% in the last 30 years (and continues to rise) and larger payloads of up to 44 tonnes, on 6 axles, have been permitted on the UK's road network since 1994.
However, following successful performance assessment trials using Instarmac's five-part BBA/Hapas approved Ultracrete Ironwork Reinstatement system; Wakefield MDC may well have found the answer.
The trials were specifically carried out at Wakefield's Forty One Industrial Estate where manholes are located directly in the wheel tracks of continuously entering and exiting HGVs.
In such a busy location, it was impossible for the road to be closed for any period of time and it was therefore also important that the reinstatement, once in place, could be trafficked very quickly.
The Ultracrete system came up trumps on both aspects.
Firstly, the failed manhole was excavated and all debris removed.
Ultracrete PY4, a polyester resin-based mortar that complies with the required tensile and compressive strengths as stipulated in the Highway Agency Design Manual for Roads and Bridges HA104/02, was used to re-bed the ironwork.
Ultracrete QC10 was employed to backfill the reinstatement.
The rapid strength gaining cementitious mortar provides the ideal base for the final surfacing macadam.
The next step was to seal the vertical edges of the ironwork to prevent the ingress of water and this was achieved using Ultracrete SCJ, bitumen cold joint sealer.
Finally, the reinstatement was completed by the application of Ultracrete Instant Road Repair (IRR) cold lay macadam, which is designed for first-time permanent repairs to type 2/3/4 roads.
As anticipated, the Ultracrete ironwork reinstatement was system was completed in a very short space of time, resulting in minimum disturbance to passing traffic.
It is also unlikely to cause future traffic problems since it has an anticipated service life of five years, giving long-term cost benefits and time savings.
Further information concerning the Wakefield trials can be obtained from The Instarmac Group plc.
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