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Injection Grout Made for Masonry Bridges

Tuesday, January 3, 2017

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Masonry restoration mortar systems manufacturer Cathedral Stone Products Inc. (Hanover, MD) recommends its specially formulated injection grout for reinforcing masonry in aging bridges and other large structures.

The company says its Jahn M40 injection grout can be injected into cracks to stabilize masonry, including behind concrete or masonry piers, walls, arches, monuments or building facades.

bridge before bridge after
Image credits: George Colgrove, Cathedral Stone (left); Tug44.org (right)

Cathedral Stone Products says its Jahn M40 injection grout is appropriate for use on old bridges and other infrastructure projects. The mineral-based grout was reportedly used to seal cracks between the stones of the pier of this historic covered bridge in Vermont.

Unlike epoxy grouts, Cathedral says, this product is a mineral-based grout that bonds naturally to masonry and is vapor-permeable so moisture or salt trapped inside masonry can escape. In field applications, salt passes through the surface of the substrate as efflorescence, which is then removed by wind or rain, it explains.

Vapor permeability reportedly greatly reduces the potential for deterioration caused by salt reactions in combination with freeze-thaw cycling, making Jahn M40 appropriate for repairs to public infrastructure, Cathedral adds.

Because the single-component injection grout mixes with water, preparation is easy and consistency during application is improved, according to the company. Moreover, cleanup and disposal is said to be simple because the product is water-based and, as such, is environmentally and worker safe, it adds.

More info: www.cathedralstone.com/.

   

Tagged categories: Bridges; Cathedral Stone Products; Grout; Infrastructure; Masonry; Masonry waterproofing; Permeability

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