Denso Void Filler protection for M62 ground anchors

Citation

(1998), "Denso Void Filler protection for M62 ground anchors", Anti-Corrosion Methods and Materials, Vol. 45 No. 6. https://doi.org/10.1108/acmm.1998.12845fab.014

Denso Void Filler protection for M62 ground anchors

Methods

Denso Void Filler protection for M62 ground anchors

Keywords Corrosion, Denso, Ground anchors

Over 30 ground anchors were supplied by Dywidag-Systems International Ltd in order to give slope stability and resistance to landslides at junction 22 of the eastbound carriageway of the M62. The Dywidag ground anchors are of the Permanent Multistrand type, with double corrosion protection to give a 120 year lifespan.

Plate 3 Dywidag ground anchors installed on the M62 to resist landslide. The end caps (shown here) of the permanent anchors contain Denso Void Filler for long term anti-corrosion protection

A key feature of the anti-corrosion protection is the use of Winn & Coales Denso Void Filler, which was pumped into the 260mm o.d. × 600mm end caps (Plate 3). Based on microcrystalline petrolatum containing corrosion inhibitors and moisture repellents, the Denso Void Filler forms a permanently flexible medium for the encapsulation and protection of the individual strands of the multistrand anchors.

Dywidag-Systems has installed permanent load cells within each cap for long term monitoring as part of a planned maintenance programme. The use of the Denso Void Filler enables access, for individual check-loading of each strand with a monostrand jack, to establish the retained load.

Denso Void Filler has been used on a number of major international construction projects, including the protection of all the stay cables and external post tensioning steel strands on the Second Severn Crossing. A special Winn & Coales Engineering Service can give advice on all aplications.

Details: Winn & Coales (Denso) Ltd, UK. Tel: +44 (0) 181 670 7511; Fax: +44 (0) 181 761 2456.