Rapid Concrete Reinstatement of Joint Nosings on Motorway Bridge.
Whilst the bridges between junctions 24 and 25 of the M1 motorway (connecting London with the North) were being prepared for a major bridge deck waterproofing project, contractors discovered significant deterioration in the concrete deck caused by chloride ingress from de-icing salts which clearly had to be reinstated prior to coating.
In order to ensure that all works were completed within the strict schedule imposed by the Client, specialist contractor Fixcrete Limited was appointed to carry out the reinstatement using Fastfill. This rapid hardening, fibre reinforced, polymer modified repair mortar is based on Portland cement technology which cures to give reliable strength development and excellent long-term durability due to its advanced shrinkage compensated formulation. Key reasons for its specification were an ability to achieve a compressive strength of 25N/mm² in just 4 hours at 20˚C to allow application of the waterproofing membrane, significantly reducing the contract time over traditional repair mortars.