National foreword

This British Standard is the UK implementation of EN 933‑5:2022. It supersedes BS EN 933‑5:1998, which is withdrawn.

The UK participation in its preparation was entrusted to Technical Committee B/502/6, Test methods.

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 2022.

This European Standard was approved by CEN on 26 September 2022.

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 933‑5:2022) has been prepared by Technical Committee CEN/TC 154 “Aggregates”, the secretariat of which is held by BSI.

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 May 2023, and conflicting national standards shall be withdrawn at the latest by May 2023.

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 933‑5:1998.

This document has been prepared under a Standardization Request given to CEN by the European Commission and the European Free Trade Association.

In comparison with the previous edition, the following technical modifications have been made:

The title has been revised to better reflect the scope;
Clause 1: Scope has been clarified to show that the standard applies to coarse and all-in natural aggregates, but not to lightweight aggregates.
Clause 3: The definition of a crushed surface has been changed. The definitions of aggregate size and a rounded particle have been deleted. The definition of a rounded surface has been added;
Clause 4: Principle has been amended;
Clause 5: Coloured pencil has been added as optional apparatus to facilitate the procedure of estimating crushed and rounded parts of a particle surface;
Clause 6: Preparation of test portion has been revised;
Clause 7: Procedure has been amended and an illustrating figure has been added;
Clause 8: Calculation and expression of results has been amended;
Clause 9: The lists of required and optional data have been updated;
New informative Annex A, with guidance for estimated mass of various size fractions with about 100 particles, has been added;
New informative Annex B, with example of application of the test procedure, has been added;
Previous Annex A, with example of a test data sheet, has been revised and moved to Annex C.

This document forms part of a series of tests for geometrical properties of aggregates. Test methods for other properties of aggregates are covered by the following European Standards:

EN 932 (all parts), Tests for general properties of aggregates
EN 1097 (all parts), Tests for mechanical and physical properties of aggregates
EN 1367 (all parts), Tests for thermal and weathering properties of aggregates
EN 1744 (all parts), Tests for chemical properties of aggregates
EN 13179 (all parts), Tests for filler aggregate used in bituminous mixtures

The other parts of the EN 933 series include:

Part 1: Determination of particle size distribution - Sieving method
Part 2: Determination of particle size distribution - Test sieves, nominal size of apertures
Part 3: Determination of particle shape - Flakiness index
Part 4: Determination of particle shape - Shape index
Part 6: Assessment of surface characteristics - Flow coefficient of aggregates
Part 7: Determination of shell content - Percentage of shells in coarse aggregates
Part 8: Assessment of fines - Sand equivalent test
Part 9: Assessment of fines - Methylene blue test
Part 10: Assessment of fines - Grading of filler aggregates (air jet sieving)
Part 11: Classification test for the constituents of coarse recycled aggregate

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.

1 Scope

This document specifies the reference method, used for type testing and in case of dispute, for the determination of the percentages of crushed particles, totally crushed particles and totally rounded particles in coarse and all-in natural aggregates. Other methods can be used for other purposes, such as factory production control, provided that an appropriate working relationship with the reference method has been established.

NOTE 1 Examples of advanced test methods can be found in the Bibliography.

This document applies to coarse aggregates comprising particles within size fraction 4/63 mm. It does not apply to lightweight aggregates.

NOTE 2 For coarse aggregate between 4 mm and 20 mm the percentages of crushed surfaces are linked to the flow coefficient and can therefore be used in association with the test method specified in EN 933‑6.

Clause 7.1 specifies the procedure for test portions consisting of one size fraction and Clause 7.2 specifies the procedure for test portions consisting of two or more size fractions.

Guidance for the estimated mass of various size fractions with about 100 particles is given in informative Annex A.

Examples of application of the test procedure and an example of a test data sheet are given in informative Annexes B and C.

2 Normative references

3 Terms and definitions

4 Principle

5 Apparatus

5.1

5.2

5.3

5.4

5.5

5.6

5.7

5.8

6 Preparation of test portion

7 Procedure

7.1 Test portions consisting of one size fraction where D₀ ≤ 2d₀

7.2 Test portions consisting of two or more size fractions

8 Calculation and expression of results

8.1 Test portions consisting of one size fraction

8.2 Test portions consisting of two or more size fractions

9 Test report

9.1 Required data

9.2 Optional data

Bibliography

BS EN 933-5:2022

Tests for geometrical properties of aggregates - Determination of percentage of crushed particles in coarse and all-in natural aggregates

Current

Published:

30 Nov 2022