FP McCann – Irish salt mines

Shay Murtagh Precast recently manufactured and supplied U-channel and cover slab units to Irish Salt Mines Project to main contractors FP McCann Ltd.. The U-section and cover slab formed a reclaim tunnel at the Irish Salt Mines Kilroot facility in Carrickfergus. The units supplied to date complete Phase 01 of the works with over 75 linear metres delivered to site.

Durability was a major consideration as the units are located in a corrosive environment and therefore 36% Ground Granulated Blastfurnace Slag Cement (GGBS) was used in the concrete mix design. This combined with 45mm cover to the reinforcement provided a 50 year design life for exposure class XD3.

The cover slabs also incorporated special openings to accommodate a loading chute and the system was designed for a substantial surcharge load due the self weight of the salt above as well as superimposed live loading.

The channel had internal dimensions of 3.2m wide and 2.4m high with a section thickness of 300mm. The cover slabs were 400mm thick and all units were manufactured in 2m modules. FP McCanns liaised with our logistics team for seamless delivery for installation

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