Dumfries Structural Repairs – NATCEM® 35, NATCEM® AC, CWG Grout, NATCEM® Retarder

Project: Structural Repairs at Dumfries Bridge

Location: Dumfries, Scotland

Products: NATCEM® 35, NATCEM® AC, CWG Grout, as well as NATCEM® Retarder

Contractor: Chalmers Construction

Client: Dumfries Council

Project Background

Chalmers Construction undertook extensive structural repairs to a historical bridge in Dumfries. The bridge, which had suffered significant erosion as well as internal voids, and instability over time, required a robust repair strategy to restore its integrity and also its longevity.

A structural survey revealed extensive joint erosion. Furthermore, voids within the wall and compromised stability of the bridge were found. In response, the contractor was tasked with repointing the wall as well as stabilising internal voids, and constructing a new retaining structure to protect and reinforce the original wall also.

Methodology of Structural Repairs

The repair solution specified Natural Cement’s NATCEM® 35, NATCEM® AC, NATCEM® Retarder, as well as CWG Grout for their high-performance characteristics, ensuring compatibility with the existing masonry and long-term durability.

Scope of Work

The repair as well as the stabilisation works were carried out in the following stages:

1. Repointing Joints:
   The existing joints were repointed using NATCEM® 35, a rapid-setting mortar known for its superior durability as well as its bond strength.
2. Void Filling:
   Internal voids within the wall were filled with NATCEM® AC, chosen for its ability to flow easily into tight spaces and furthermore, providing excellent structural stability.
3. Set Control:
   Retarder was added to both mortars to extend working times, moreover enabling precise application and reducing material waste.
4. Retaining Structure:
   A new masonry wall was constructed around the original. The void between the two walls was filled with CWG Grout, furthermore providing an additional layer of reinforcement and stability.