Meet the cutie sticks

All you need to know about the beloved polypropylene macro fibers.

Product

DURUS® EasyFinish

The ADFIL Construction Fibres product DURUS® EasyFinish is a macro synthetic fibre which has endured more than most of us. Initially the fibre underwent tests proving its time dependent durability, cf. EN ISO 13438, and additive impact on the plastic shrinkage. Since then, it has been tested from every angle to get approved in the structural industry. It passed.

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Testing

The structural test

The infamous notched three-point bending test, cf. EN 14651, is the backbone of this whole organization. The standardized beam test is conducted on several beams of the same concrete matrix but with various fiber dosages.

The results from the tests are usually given graphic as the applied load compared to the crack mouth opening displacement (CMOD). In order to maintain workability of the fiber reinforced concrete, the dosage has to be limited, giving a tension-softening behavior.

In TR34 1,2 and Model Code 2010 9,10,11 the stress and moment capacities are calculated using the well-known residual flexural tensile strength values, derived from load values corresponding to four specific crack-mouth opening displacements.

From us to you

Using simplified calculation methods from the Eurocodes or using advanced Finite Element Method, it all comes down to stresses and internal forces. The test result data and intermediate stress and moment capacity calculations are simply compared to the stresses and internal forces induced by the applied loads. Voilà. We can tell you your required dosage of DURUS® EasyFinish fibers in your concrete element.

Standards and Codes

European Standards and Model Codes

Not only are the DURUS® EasyFinish fibers from ADFIL produced and tested according to European Standards, but our online programs also follow all parts of the European Standards and Model Code relevant to fiber reinforcement. Below you can see the relevant standards and codes. Further references can be seen below in our Bibliography.

Standard/Code Name Description Comments
EN 14651 + A1:2007 Test method for metallic fibre concrete - Measuring the flexural tensile strength (limit of proportionality (LOP), residual)

This European Standard specifies a method of measuring the flexural tensile strength of metallic fibered concrete on moulded test specimen. The method provides for the determination of the limit of proportionality (LOP) and of a set of residual flexural tensile strength values.

This testing method is intended for metallic fibres no longer than 60 mm. The method can also be used for a combination of metallic fibres and, a combination of metallic fibres with other fibres.
EN 14889-2:2006 Fibres for concrete - Part 2: Polymer fibres - Definitions, specifications and conformity

This Part 2 of EN 14889 specifies requirements for polymer fibres for structural or non-structural use in concrete, mortar and grout.

NOTE – Structural use of fibres is where the addition of fibres is designed to contribute to the load bearing capacity of a concrete element. This standard covers fibres intended for use in all types of concrete and mortar, including sprayed concrete, flooring, precast, in-situ and repair concretes.

This standard is harmonized and used for CE marking.

Only harmonized standards are legislative.
EN 14845-2:2006 Test methods for fibres in concrete - Part 2: Effect on concrete

This European Standard specifies a method for determining the effect of fibres, steel or polymer, on the residual flexural strength of a reference concrete.
fib MC2010 fib Model Code for Concrete Structures 2010

This edition of the Model Code gives an extensive state-of-the-art regarding material properties for structural concrete. This includes constitutive relations for concrete up to strength class C120, and properties of reinforcing and prestressing steel, including prestressing systems. Special attention is given to the application of fibre concrete for structural applications, the application of non-metallic reinforcement, interface characteristics, verification assisted by numerical simulations, verification assisted by testing, and to a number of important construction aspects.

Bibliography

The library behind our knowledge

1.
Concrete industrial ground floors - A guide to design and construction, Technical Report No. 34, Concrete Society, 3rd Edition
2.
Concrete industrial ground floors - A guide to design and construction, Technical Report No. 34, Concrete Society, 4th Edition
3.
Concrete industrial ground floors, ICE design and practice guide, Frank R. Neal, Frank Neal Engineers, Second Edition
4.
Guide to Design of Slabs-on-Ground, ACI 360R-10, Reported by ACI Committee 360, American Concrete Institute
5.
Design of floors on ground, Technical Report 550, J. W. E. Chandler, Cement and Concrete Association
6.
Test and design methods for steel fibre reinforced concrete, σ-ε-design method, RILEM TC 162-TDF, Vol. 36, RILEM
7.
Eurocode 2: Design of concrete structures - Part 1-1: General rules and rules for buildings, EN 1992-1-1, European Committee for Standardization
8.
Eurocode 7: Geotechnical design - Part 1: General rules, EN 1997-1, European Committee for Standardization
9.
Model Code 2010, First complete draft, Volume 1, bulletin 55, International Federation for Structural Concrete (fib)
10.
Model Code 2010, Final draft, Volume 1, bulletin 65, International Federation for Structural Concrete (fib)
11.
Model Code 2010, Final draft, Volume 2, bulletin 66, International Federation for Structural Concrete (fib)
12.
Airport Pavement Design and Evaluation, AC 150/5320-6E, U.S. Department of Transportation, Federal Aviation Administration

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