ADMIXTURES FROM A GREAT FAMILY
Like a harp that plays the sweet notes of technology and innovation: to construct this bridge, the best solutions offered by Mapei took the field, including super-plasticising admixtures and special mortars to anchor steelwork, skim surfaces and finish off the load-bearing structures.
The main contractor for the bridge was Cimolai SpA, and right from the start Mapei played an important part in the mix design of the concrete used to construct the two abutments, the main pillar and all the ancillary work for these parts of the bridge. Going more into detail, DYNAMON SX 42, which is part of the DYNAMON family of admixtures, was used extensively. This product is a formaldehyde-free, super-plasticising solution of acrylic polymers which is highly effective in dispersing cement granules, and also contains secondary components which considerably improve the cohesion and pumpability of concrete.
MAPEFILL high-flow, non-shrink cementitious grout was used later on during construction of the bridge to anchor the uprights for the protection barriers in place.
Once the enormous ashlar caisson for the bridge had been built, a series of tests were carried out on site to find the most suitable system to protect the concrete. Tried and tested systems proposed by Mapei were also chosen in this case, and work continued by applying MAPEFER two-component, anti-corrosion cementitious mortar to protect the steel reinforcement.
Small areas of the bridge were reintegrated with MAPEGROUT LM 2K two-component, thixotropic, fibre-reinforced, cementitious mortar or else with MAPEGROUT T40, medium strength, shrinkage-compensated, fibre-reinforced, thixotropic mortar. EPORIP was also used for monolithic construction joints between fresh and hardened concrete.
The next stage of the work was to skim over all the substrates with light grey PLANITOP 100 fast-setting, fine mortar.
The surfaces were then painted with QUARZOLITE BASE COAT coloured acrylic undercoat and adhesion promoter, which has good defect-covering properties and is suitable for use on both internal and external surfaces.
The last step was to finish off the surfaces with ELASTOCOLOR PAINT, a special protective and crack-bridging elastomeric paint with long-lasting elasticity and good resistance to chemical agents and ageing.
So, thanks also to Mapei, a new city has been born, a city whose history is symbolised by the old town centre dominated by the Federiciano Castle, and a future shaped by a modern and majestic feat of engineering, as well as by the River Crati, which will soon become navigable, and by new residential buildings and the redevelopment of an area which was once full of slum housing.