LA MATASSINA - LA GRAMIGNA PLACCHETTA

Our Glued Steel Fibres  are produced from the high quality  cold drawn wire, with low or high strength.‎ They are properly shaped at the end for a better anchorage into the cement paste.‎ They are supplied glued one another in small sheets to make the dosage and the introduction into the paste easy.‎  Once fibres are added into the cement paste, water makes them split and distribute homogeneously.‎ The use of fibres has the purpose to improve the flexural strength of concrete.‎  La Gramigna fibres  act as a widespread resistant element sewing together the crack’s faces.‎ DOSAGES The quantity of steel fibres normally used has to ensure a continuous reinforcement inside the concrete matrix (normally the quantity goes from 25 to 60 kg/m³ and the corresponding volumetric percentage goes from 0,30% to 0,75%.‎ If we consider the same quantity and composition, fibres become more efficient according to a growing L/D aspect ratio (ratio of length to diameter),because the adherence between the two materials increases and as a consequence the fibre reinforcement improves concrete performances.‎ The stressed fibres subjected to a tensile strength do not slip out easily.‎ It is important that fibre has an aspect ratio L/D 50or higher.‎ The shape of fibres has a positive influence on the adherence to the cement matrix,the more fibres are shaped the more they are effective.‎ BENEFITS increased ductility of concrete; increased flexural strength and impact resistance; high ductility of the structure; anti-shrinkage efficiency; considerable fatigue life resistance and resistance to dynamic loads; enhanced adherence to the cement matrix of concrete; great pumpability: homogeneous distribution into the paste; reduction of laying costs in the plant.‎ APPLICATIONS Industrial floors; Precast elements; parking places, airstrip, motorways, parking areas and highway barriers; slabs and structures with a thin section; constructions of dams and water projects ; refractory concrete subjected to strong thermal stresses; castings for constructions that have to absorb impacts and/or have to bear fatigue endurance, and heavy static and dynamic loads; spritz-beton; CE CERTIFICATION Steel fibres Gramigna have a CE mark and they comply with UNI EN 14889-1 (steel) regulation.‎ Each supply is provided with the CE Certification, the Conformity Certificate and the Declaration of Performance of the product.‎ They are easier to feed and distribute into the concrete mix.‎