ISO/TC 71/SC 6 - Non-traditional reinforcing materials for concrete structures

This document specifies a test method for evaluating direct tensile resistance of strain hardening fibre-reinforced cementitious composites (FRCCs) using tensile parameters. This test method provides tensile stress versus strain curve, first cracking strength, post cracking strength, strain capacity (strain at post cracking point), and the number of cracks within gauge length. This test method is primarily intended for use with FRCCs that exhibit strain hardening behaviour. This test method is not intended for materials that exhibit strain-softening behaviour.

This document specifies discrete polymer fibres with a nominal length of 80 mm or less mixed in concrete and mortar. The quality and performance specified in this standard are the raw material resin of discrete polymer fibres, nominal fibre diameter and its allowable range, nominal fibre length and its allowable range, fibre cross-sectional shape, fibre longitudinal shape, grade of fibre strength, and grade of fibre elasticity. There are a wide variety of discrete polymer fibres used to reinforce cement composites. Currently, in discrete polymer fibres products distributed as industrial products, there are many types of raw material resins and various shapes. In addition, the applications that have been used in practical fields are so wide, from structural applications that require high mechanical reinforcement performance to crack control and peeling prevention that are easier to use. Therefore, to select an appropriate product from a wide variety of discrete polymer fibres, the characteristics of discrete polymer fibres need to be classified and revealed based on a unified evaluation method. This document allows manufacturers to ensure the performance of discrete polymer fibres are in accordance with an adequate standard in response to various user requests.

This document specifies requirements for fibre-reinforced polymer (FRP) sheets for upgrading of concrete members for material suppliers. The methodologies to express the mechanical properties as characteristic values, appearance and dimensions, and sampling test are specified in this document. The fibre orientation of the FRP sheets covered by this document is unidirectional.

This document specifies test methods applicable to fibre-reinforced polymer (FRP) sheets for the upgrading of concrete members.

This document specifies test methods applicable to fibre-reinforced polymer (FRP) grids as reinforcement or pre-stressing tendons in concrete, including physical, mechanical, durability, long term durability and bond properties. FRP grids in this document can be used for rehabilitating existing reinforced concrete (RC) structures and reinforcing new constructions. FRP grids in this document are made of fibre and resin matrix. The types of fibres are aramid fibre, basalt fibre, carbon fibre or glass fibre. The matrix includes thermosetting resins, such as vinylester, unsaturated polyester resins, as well as thermoplastic resins, including polypropylene, polyamides, and polymethyl methacrylate. FRP grids in this document are a rigid array of interconnected FRP bars, and do not include fibre textile and fabric with a mesh type. In this document, durability refers to alkali resistance.

This document specifies test methods applicable to fibre-reinforced polymer (FRP) bars as reinforcement or pre-stressing tendons in concrete, including physical, mechanical, durability, and long-term properties. FRP bars in this document are made of fibre and resin matrix. Types of fibres are aramid fibre, basalt fibre, carbon fibre or glass fibre. The matrix includes thermosetting resins, such as vinylester, unsaturated polyester resins, as well as thermoplastic resins, including polypropylene, polyamides, and polymethyl methacrylate.

This document specifies the test method for the load-displacement curves of fibre-reinforced cementitious composites (FRCC) by three-point loading of notched prisms. The main purpose of this test is to evaluate the tension softening curve of FRCC. NOTE 1 Both crack mouth opening displacement (CMOD) and load point displacement (LPD) are specified as the displacement in load-displacement curves, but measurement of both might not be necessary. Either can be selected depending on the purpose of measurement. NOTE 2 Three-point bending test using notched specimen generally provides higher results than those observed in four-point bending test, in which the fracture occurs at the weakest point of the specimen.

This document specifies requirements for unidirectional carbon fibre-reinforced polymer (CFRP) strips as external-bonded reinforcements on the concrete substrate. This document is applicable for the CFRP strips that: — consist of carbon fibre and thermoset resin; — are manufactured by pultrusion method; — have a carbon fibre fraction over 60 % by volume; and — have a thickness within 3 mm. This document specifies the methodologies to express the mechanical properties as characteristic values, appearance and dimensions, and sampling test.

This document specifies the principles and procedures to secure quality control of steel fibre-reinforced concretes (SFRC) during batching and mixing procedures to deliver to a purchaser with the ingredients uniformly mixed, and that can be sampled and tested at the point of delivery.

This document specifies the test methods for discrete polymer fibre for fibre-reinforced cementitious composites (FRCC). This document defines the test methods for discrete polymer fibre, such as diameter, length, tensile strength, initial modulus of elasticity, density, melting point, moisture content and alkaline durability as basic items. These are test methods intended for certification of a fibre and not for quality control or field acceptance.

This document provides general principles for the verification and assessment of the performance of concrete structures with the applications of different fibre-reinforced polymer (FRP) systems varying from internal FRP reinforcements/tendons, external FRP tendons, externally bonded FRP sheets/plates, to near-surface mounted FRP reinforcement. It can be used for the international harmonization of the design of un-reinforced, conventionally reinforced, and pre-stressed concrete structures with the use of the above-mentioned FRP systems.

This document specifies test methods applicable to unidirectional carbon fibre-reinforced polymer (CFRP) strips as external-bonded reinforcements on the concrete substrate. This document is applicable for the CFRP strips that: — consist of carbon fibre and thermoset resin; — are manufactured by pultrusion method; — have a higher carbon fibre fraction such as over 60 %; and — have a thickness within 3 mm. Also, the test pieces for determining tensile properties are cut down from CFRP strips along the CFRP strips axis, and have bonded anchorage block at the both ends.

This document specifies the test method for obtaining bending moment-curvature curves of fibre-reinforced cementitious composites (FRCCs) through four-point bending test of prism specimens. It is applicable to FRCCs that show separated multiple cracks under pure bending before maximum load.

This document specifies a test method for evaluating flexural performance of fibre-reinforced cementitious composites (FRCCs) using derived parameters. These parameters are derived from the load-deflection curve obtained by testing a circular specimen supported on a concentric ring and loaded by another ring with a smaller diameter. The performance of FRCCs tested by this method is characterized for biaxial properties. This test method provides for the determination of first-cracking load and the corresponding stress. It also provides for the determination of specimen toughness based on the area under the load-deflection curve up to the deflections at the first-cracking and peak loads. For determining the toughness value, this test method is intended primarily for use with FRCCs that exhibit deflection hardening behaviour. This test method is not intended for materials that exhibit deflection-softening behaviour.

ISO 19044:2016 specifies the test method for the load-displacement curves of fibre-reinforced cementitious composites (FRCC) by three-point loading of notched prisms. The main purpose of this test is to evaluate the tension softening curve of FRCC.

ISO 18319:2015 specifies requirements for fibre-reinforced polymer (FRP) sheets for upgrading of concrete members. The methodologies to express the mechanical properties as characteristic values, appearance and dimensions, and sampling test are specified in this International Standard. The properties for design are calculated from the characteristic values, as prescribed in an appropriate design code which is in accordance with ISO 14484. The fibre orientation of the FRP sheets covered by this International Standard is unidirectional.

ISO 10406-2:2015 specifies test methods applicable to fibre-reinforced polymer (FRP) sheets for the upgrading of concrete members.

ISO 10406-1:2014 specifies test methods applicable to fibre-reinforced polymer (FRP) bars and grids as reinforcements or pre-stressing tendons in concrete.

ISO 14484:2013 provides general principles for the verification and assessment of the performance of concrete structures with the applications of different fibre-reinforced polymer (FRP) systems varying from internal FRP reinforcements/tendons, external FRP tendons, externally bonded FRP sheets/plates, to near-surface mounted FRP reinforcement. It can be used for the international harmonization of the design of un-reinforced, conventionally reinforced, and pre-stressed concrete structures with the use of the above-mentioned FRP systems.

ISO 10406-2:2008 specifies test methods applicable to fibre-reinforced polymer (FRP) sheets for the upgrading of concrete members.

ISO 10406-1:2008 specifies test methods applicable to fibre-reinforced polymer (FRP) bars and grids as reinforcements or pre-stressing tendons in concrete.