Expansion Joint Repair by way of Retrofitting
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MAURER Expansion Joint Repair by way of Retrofitting An alternative to a complete replacement Short execution time Flexible arrangement of the working sequence Minimum impact for the building structure MAURER Expansion Joint Repair, System „Box-In-Box“, lifting the new expansion joint into the old and prepared blockout Expansion Joints are structural members under dynamic loads, and can be kept intact over many years by way of regular maintenance and replacement of the wearing parts like sliding bearings, sliding springs, control springs, sealing elements, and by maintaining the corrosion protection. Should damages accumulate by way of cracks in the steel structure, the life time of the expansion joint has come to an end. Next to a complete replacement of the expansion joint there are alternatives available by way of retrofits which offer the client economical and technical advantages. Thereby, the anchoring structure of the joint remains in the bridge deck, because it has to accommodate only negligible fatigue strains, and its lifetime is being defined mainly by the corrosion protection. Corresponding to the type of expansion joints, various options for retrofitting are available.

MAURER Expansion Joint Repair by Way of Retrofitting The alternative to complete replacement 1. Retrofit of a Single Seal Expansion Joint In case that the edge beams are so much damaged that a watertight fixation of the strip seal is no longer possible, or the gap between the edge beams should be too narrow to replace the sealing elements, the single seal expansion joint can be retrofitted with relatively little effort. To do so, the expansion joint must be opened at both sides by a width of ca. 20 cm. That is, the asphalt (or concrete) in the carriageway and the concrete in the footway...

MAURER Expansion Joint Repair by Way of Retrofitting The alternative to complete replacement Only the sealing element remains as a wearing part. Also in this case, the retrofit can be achieved by half side blocking of the traffic. 3. Retrofit of a 2 seal expansion joint into a single seal expansion joint with noise reduction Should the client prefer an expansion joint with reduced noise emission, for example in inner cities, the retrofit can be carried out from a 2 seal expansion joint into a single seal expansion joint with reduced noise emission of type XW1. This type of expansion joint...

MAURER Expansion Joint Repair by Way of Retrofitting The alternative to complete replacement Removal of cover layer, protection layer, and waterproofing In the area of the footway, the footway box will be set free while maintaining the existing reinforcement. Thereafter, all movable parts of the existing expansion joints will be separated into smaller units and removed. New corrosion protection of the remaining part of the expansion joint The new expansion joint will be delivered inclusive of joist boxes and the inner sealing elements in one part, lifted into the renovated block out,...

MAURER Expansion Joint Repair by Way of Retrofitting The alternative to complete replacement Placement of guss asphalt After asphalting and concreting works, elastic fillers have to be inserted in the footway section, respectively bitumastic fillers in the carriageway. This retrofit can be carried out in 2 sequences by half way blocking of traffic. With the exception of the works with setting free the footway joist box, no intrusion into the bridge structure will be necessary. This type of retrofitting of an expansion joint is of special advantage for the client in case of prestressed...