National foreword

This British Standard is the UK implementation of EN 14488‑4:2005+A1:2008. It supersedes EN 14488‑4:2005 which is withdrawn.

The start and finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment A1 is indicated by.

The UK participation in its preparation was entrusted by Technical Committee B/517, Concrete, to Subcommittee B/517/10, Sprayed concrete.

A list of organizations represented on this subcommittee can be obtained on request to its secretary.

This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

Compliance with a British Standard cannot confer immunity from legal obligations.

This British Standard was published under the authority of the Standards Policy and Strategy Committee on 6 September 2005

This European Standard was approved by CEN on 17 April 2005 and includes Amendment 1 approved by CEN on 21 January 2008.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

Foreword

This document (EN 14488‑4:2005+A1:2008) has been prepared by Technical Committee CEN/TC 104 “Concrete and related products”, the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2008 and conflicting national standards shall be withdrawn at the latest by September 2008.

This document includes Amendment 1, approved by CEN on 2008-01-21.

This document supersedes EN 14488‑4:2005.

The start and finish of text introduced or altered by amendment is indicated in the text by tags .

This European Standard is part of a series concerned with testing sprayed concrete.

This series EN 14488Testing sprayed concrete includes the following parts:

Part 1: Sampling fresh and hardened concrete
Part 2: Compressive strength of young sprayed concrete
Part 3: Flexural strengths (first peak, ultimate and residual) of fibre reinforced beam specimens
Part 4: Bond strength of cores by direct tension
Part 5: Determination of energy absorption capacity of fibre reinforced slab specimens
Part 6: Thickness of concrete on a substrate
Part 7: Fibre content of fibre reinforced concrete

deleted text

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.

1 Scope

This European Standard describes a means of determining the tensile bond between sprayed concrete and substrate of concrete or rock tested in a laboratory as a direct tension test. Bond strength is defined as the capacity to transfer tension between two layers. Bond strength is calculated as the ultimate tensile force divided by the stressed cross-sectional area of a core, drilled out of a sprayed concrete layer together with a portion of the substrate concrete or rock.

Alternative in situ test methods for determining bond strength are allowed provided they meet all the requirements of this European Standard. In case of dispute, the method described in this European Standard is the reference test method.

2 Normative references

3 Principle

4 Apparatus

4.1

4.2 Stone saw and surface grinder

4.3

4.4

4.5

5 Test procedures

5.1 Obtaining cores

5.2 Preparation of test specimen

5.3 Testing

6 Results

7 Report

8 Precision

BS EN 14488-4:2005+A1:2008

Testing sprayed concrete - Bond strength of cores by direct tension

Current, Under Review

Published:

6 Sep 2005