Zenith Presents A Technical Paper at CICIND Munich

Zenith Presents A Technical Paper at CICIND Munich

Andrew Kelly, Technical Director, of Zenith Structural Access Solutions Limited gave a paper at the recent 72nd CICIND conference held in Munich, Germany. The paper focused on the background, philosophy, repair scheme, scope and methodology used in the inspection and re-strengthening of a reinforced concrete chimney. The strength and durability of the top of the chimney windshield had deemed to have weakened significantly and required re-strengthening. A number of options were available. However, in the environment and taking into account the resources available the preferred option was to re-strengthen the top of the chimney with a sheath or cladding of steel and cementitious concrete grout. This technique has been used in a number of similar projects where there has been general degradation over the full circumference for a relatively short distance from the top. The steel sheath compensates for the loss of steel reinforcement and all that is required of the existing concrete is a very limited compression capacity. At the top of the chimney, the main loading is in the circumferential direction and for this reason, the plates are butt welded on the vertical joints. A fillet weld suffices for the connecting the plates on the horizontal joints as there is little loading in the vertical direction in this region.

Zenith Property Conservation Limited

Zenith Property Conservation Limited specialises in Stonework refurbishment and rebuild. This division of the Zenith Group is headed by John Henderson, who has spent decades in this highly skilled field. Managing Director, Colin McCurdy comments, "we are delighted to offer clients a first class service when it comes to projects on historic buildings. We are able to restore and alter existing ...

Zenith Completes Major FRP Stack Repair

Zenith SAS Limited has successfully completed a $900,000 FRP repair on a 200m High Reinforced Concrete Chimney. The windhsield directly below the termination point both internally and externally on the stack was found to be in a very poor condition. The spalled concrete was removed and the windshield was repaired to it's original profile and finally a FRP coating was applied to the complete ...