Bridge expansion joints are essential to accommodate movement caused by temperature change, traffic loading, shrinkage and creep. They allow the bridge deck and structure to expand, contract and flex without cracking or distorting. Without properly designed joints, these movements would cause the bridge to buckle, deform or fail prematurely. Expansion joints maintain alignment, protect structural integrity and ensure the bridge remains safe, durable and serviceable throughout its lifespan.

Granite and sand each serve distinct functions in bridge jointing systems.

Granite aggregates, such as our durable Green Granite, are typically used in high-strength mortars, haunch repairs and structural bedding around expansion joints. Their angular shape, high hardness (Mohs 7) and excellent resistance to abrasion make them ideal for supporting nosing units and transferring loads in heavy-traffic locations.

Graded silica sands, on the other hand, are used where fine control and packing are required, for example, as fillers in epoxy or cementitious grouts, bedding for plates and void filling around joint components.

Selecting between granite and sand depends on the specific joint design and material system being used. Both are essential components in maintaining bridge performance, stability and safety.

Contact our expert team, who can advise you on the best product for your requirements.

The grade and quality of the aggregates you choose are crucial to the success of your project. Grantex aggregates are carefully sourced, screened to exacting specifications and dried using our state-of-the-art in-house facilities. We also conduct our own laboratory testing to ensure the quality, grading and suitability of our aggregates, ensuring they meet the needs and requirements of your bridge maintenance project.