Steel fibers may be divided into five groups: Therefore steel fiber reinforced concrete shall never be simplified as a “concrete with steel fibers”. Steel fibers bridge the crack at very small crack openings, transfer stresses and develop post crack strength in the concrete.Ī variety of fiber types (material, shape, size.) are available, their effect in concrete varies. Steel fibers are a discontinous, 3-dimensionally orientated, isotropic reinforcement, once they are mixed into the concrete. Steel fiber reinforced concrete is an alternative to traditional reinforced concrete for certain application areas. It gives a base for comparison with alternative (mainly traditional) reinforcement solutions and it reinforces our commitment to incorporate lifecycle assessment into our sustainability ambition. In addition, we are working with One Click LCA to enable customers to efficiently compare Dramix® based solutions for the sustainability advantages they bring on construction/building assets and processes. Other plants will follow the same process in the near future, with our goal to have our full portfolio covered by end of 2022. An EPD is compliant with the ISO 14025 standard.īekaert wants to help customers improve the sustainability of their construction/building assets and has therefore worked with ITB to obtain an EPD certification for its Dramix® portfolio, manufactured in Petrovice (Czech Republic), our largest manufacturing plant, as well as in Lonand (India) and Karawang (Indonesia). How much mixing time is required when adding steel fibers to a ready mix truck?Īn Environmental Product Declaration (EPD) is an independently verified and registered report that communicates transparent and comparable information about the lifecycle environmental impact of products in a credible way.AStM c1399 can lead to inflated post crack flexural strengths due to favorable fiber orientation and the use of a steel plate to control the first crack’s energy release. The two testing procedures are AStM c1399 Standard test Method for obtaining Average residual-Strength of Fiber-reinforced concrete and AStM c1609 Standard test Method for Flexural Performance of Fiber-reinforced concrete. AStM international has two flexural testing procedures for fiber reinforced concrete. A fiber dosage alone has no performance related value at all. For the same concrete composition, steel fiber performance is a function of fiber length, diameter, aspect ratio, anchorage and tensile strength.
This will typically be determined with a bending test and is often referred to as the residual flexural strength (see below). The post crack strength of steel fiber concrete is a material property which is commonly used to differentiate fiber performance.
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