National foreword

This British Standard is the UK implementation of EN 12390‑6:2023. It supersedes BS EN 12390‑6:2009, which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee B/517/1, Concrete production and testing.

A list of organizations represented on this committee can be obtained on request to its committee manager.

Contractual and legal considerations

This publication has been prepared in good faith, however no representation, warranty, assurance or undertaking (express or implied) is or will be made, and no responsibility or liability is or will be accepted by BSI in relation to the adequacy, accuracy, completeness or reasonableness of this publication. All and any such responsibility and liability is expressly disclaimed to the full extent permitted by the law.

This publication is provided as is, and is to be used at the recipient’s own risk.

The recipient is advised to consider seeking professional guidance with respect to its use of this publication.

This publication is not intended to constitute 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 30 November 2023.

This European Standard was approved by CEN on 22 October 2023.

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-CENELEC 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-CENELEC Management Centre has the same status as the official versions.

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

European foreword

This document (EN 12390‑6:2023) has been prepared by Technical Committee CEN/TC 104 “Concrete and related products”, the secretariat of which is held by SN.

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 month May 2024, and conflicting national standards shall be withdrawn at the latest by May 2024.

Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 12390‑6:2009.

The main change from the previous edition EN 12390‑6:2009 of this document has been to include the testing of cored specimens. The reference specimen for the test is a moulded cylindrical specimen.

This document is one of a series concerned with testing concrete.

EN 12390, Testing hardened concrete, consists of the following parts:

Part 1: Shape, dimensions and other requirements for specimens and moulds
Part 2: Making and curing specimens for strength tests
Part 3: Compressive strength of test specimens
Part 4: Compressive strength — Specification for testing machines
Part 5: Flexural strength of test specimens
Part 6: Tensile splitting strength of test specimens
Part 7: Density of hardened concrete
Part 8: Depth of penetration of water under pressure
Part 10: Determination of the carbonation resistance of concrete at atmospheric levels of carbon dioxide
Part 11: Determination of the chloride resistance of concrete, unidirectional diffusion
Part 12: Determination of the potential carbonation resistance of concrete: Accelerated carbonation method
Part 13: Determination of secant modulus of elasticity in compression
Part 14: Semi-adiabatic method for the determination of heat released by concrete during its hardening process
Part 15: Adiabatic method for the determination of heat released by concrete during its hardening process
Part 16: Determination of shrinkage of concrete
Part 17: Determination of creep of concrete in compression
Part 18: Determination of chloride migration coefficient
Part 19: Determination of resistivity (in preparation)

Any feedback and questions on this document should be directed to the users’ national standards body. A complete listing of these bodies can be found on the CEN website.

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

Introduction

This test method was one of a number of test methods examined in a laboratory inter-comparison programme. The work was partly funded by the EC under the Measurement and Testing programme, contract MAT1-CT94-0043. The programme and other references showed the following:

Tensile splitting strengths measured between the normal plane platens of testing machines gave the same results as those using the special curved platens, originally described in ISO 4108:1980 [1]. Although these curved platens have been optionally retained in this document, they are not necessary for the measurement.
The material used for the packing strips affects the apparent tensile strength measured. This has led to the decision to standardize on hardboard strips, since they provided the lowest standard deviations.
The apparent tensile strength measured depends upon the shape and size of the test specimen used:
1. cubes gave higher measured tensile strengths than moulded cylinders, by approximately 10 %;
2. 150 mm cubes gave lower measured tensile strengths than 100 mm cubes;
3. the effect of moulded cylinder size on measured tensile strength was not found to be significant, possibly due to the variability of the data.

As a result of these conclusions from the laboratory programme, this document restricts the measurement of tensile splitting strength to cylindrical specimens used with hardboard packing strips, which is the reference method. However, as some countries still test cubical or prismatic specimens, their use has been retained in Annex A. In cases of dispute, the reference method is the use of moulded cylinders of 150 mm diameter and 300 mm length.

It is recognized good practice to include measurement of density prior to the determination of tensile splitting strength, as a check on compaction.

1 Scope

This document specifies the method for the determination of the tensile splitting strength of test specimens of hardened concrete. The reference specimens are moulded cylindrical specimens.

Cores of at least 75 mm diameter complying with the requirements of EN 12504‑1 can be tested using this method.

The use of cubic or prismatic specimens is included in Annex A.

2 Normative references

3 Terms and definitions

4 Principle

5 Apparatus

5.1 Testing machine

5.2 Jig (optional)

5.3 Packing strips

6 Test specimens

6.1 General

6.2 Adjustment of test specimens

6.3 Marking

7 Procedure

7.1 Specimen preparation

7.2 Specimen positioning

7.3 Loading

7.4 Examination of specimens

8 Expression of results

9 Test report

10 Precision

Bibliography

BS EN 12390-6:2023

Testing hardened concrete - Tensile splitting strength of test specimens

Current

Published:

30 Nov 2023