440.3R-04: Guide Test Methods for Fiber-Reinforced Polymers (FRPs) for Reinforcing or Strengthening Concrete Structures

440.3R-04: Guide Test Methods for Fiber-Reinforced Polymers (FRPs) for Reinforcing or Strengthening Concrete Structures

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Description

FRP reinforcing bars and laminates offer advantages over steel reinforcement in that FRP is noncorrosivedoes not corrode and is nonconductive. FRP reinforcing bars, grids, and tendons are being used for nonprestressed and prestressed concrete structures. FRP laminates are being used as external reinforcement for strengthening of existing concrete and masonry structures. Due to differences in the physical and mechanical behavior of FRP materials compared to steel, unique test methods for FRP bars and laminates are required.

This document provides model test methods for the short-term and long-term mechanical, thermo-mechanical, and durability testing of FRP bars and laminates. It is anticipated that these model test methods may be considered, modified, and adopted, either in whole or in part, by a U.S.national standards-writing agency such as ASTM International or AASHTO. The publication of these test methods by ACI Committee 440 is an effort to aid in this adoption.

The recommended test methods are based on the knowledge gained from research results and literature worldwide. Many of the proposed test methods for reinforcing rods are based on those found in “Recommendation for Design and Construction of Concrete Structures using Continuous Fiber Reinforcing Materials” published in 1997 by the Japan Society for Civil Engineers (JSCE). The JSCE test methods have been modified extensively to add details and to adapt the test methods to U.S. practice.

Keywords: anchorage; bond; concrete; coupler; creep; fatigue; fiber-reinforced

polymers (FRP); modulus of elasticity; reinforced concrete;

shear; splice; stirrup; strength; tendon.

 

Document Details

Author: ACI Committee 440

Publication Year: 2017

Pages: 40

ISBN: 9780870311628

Categories: Fiber-Reinforced Concrete

Formats: PDF

This document is Historical

Table of Contents

Part 1—General

1.1—Introduction

1.2—Scope

1.3—Existing ASTM test methods

1.4—Definitions

1.5—Notation

Part 2—Test methods for FRP bars for concrete structures

B.1—Test method for cross-sectional properties of FRP bars

B.2—Test method for longitudinal tensile properties of FRP bars

B.3—Test method for bond strength of FRP bars by pullout testing

B.4—Test method for transverse shear strength of FRP bars

B.5—Test method for strength of FRP bent bars and stirrups at bend locations

B.6—Accelerated test method for alkali resistance of FRP bars

B.7—Test method for tensile fatigue of FRP bars

B.8—Test method for creep rupture of FRP bars

B.9—Test method for long-term relaxation of FRP bars

B.10—Test method for performance of anchorages of FRP bars

B.11—Test method for tensile properties of deflected FRP bars

B.12—Test method for determining the effect of corner radius on tensile strength of FRP bars

Part 3—Test methods for FRP laminates for concrete and masonry

L.1—Test method for direct tension pull-off test

L.2—Test method for tension test of flat specimen

L.3—Test method for overlap splice tension test

References

R.1—Guides and related standards

R.2—Conference proceedings

R.3—Individual papers, reports, and theses

Appendix A—Anchor for testing FRP bars under monotonic, sustained, and cyclic tension,

Appendix B—Methods for calculating tensile properties of flat specimen

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