EN ISO 3262-21:2023

Extenders - Specifications and methods of test - Part 21: Silica sand (unground natural quartz) (ISO 3262-21:2023)

This document specifies requirements and corresponding methods of test for silica sand (unground natural quartz).

Füllstoffe - Anforderungen und Prüfverfahren - Teil 21: Quarzsand (ungemahlener natürlicher Quarz) (ISO 3262-21:2023)

Dieses Dokument legt Anforderungen und die entsprechenden Prüfverfahren für Quarzsand (ungemahlener natürlicher Quarz) fest.

Matières de charge - Spécifications et méthodes d’essai - Partie 21: Sable de silice (quartz naturel non broyé (ISO 3262-21:2023)

Le présent document spécifie les exigences relatives au sable de silice (quartz naturel non broyé) et les méthodes d’essai correspondantes.

Polnila - Specifikacije in preskusne metode - 21. del: Kremenov pesek (nemleti naravni kremen) (ISO 3262-21:2023)

Ta del standarda ISO 3262 določa zahteve in ustrezne preskusne metode za kremenov pesek (nemleti naravni kremen).

General Information

• Status: Published
• Publication Date: 06-Jun-2023
• ICS: 87.060.10 - Pigments and extenders
• Technical Committee: CEN/TC 298 - Pigments and extenders
• Drafting Committee: CEN/TC 298 - Pigments and extenders
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 07-Jun-2023
• Completion Date: 07-Jun-2023
• Ref Project: SIST EN ISO 3262-21:2023 - Extenders - Specifications and methods of test - Part 21: Silica sand (unground natural quartz) (ISO 3262-21:2023)

Relations

• Replaces: EN ISO 3262-21:2000 - Extenders for paints - Specifications and methods of test - Part 21: Silica sand (unground natural quartz) (ISO 3262:2000)
• Effective Date: 19-Jan-2023
• Refers: ISO 3696:1987 - Water for analytical laboratory use — Specification and test methods
• Effective Date: 09-Feb-2026
• Refers: ISO 787-2:2021 - General methods of test for pigments and extenders — Part 2: Determination of matter volatile at 105 °C
• Effective Date: 09-Feb-2026
• Refers: EN 1177:2018+AC:2019/FprA1 - Impact attenuating playground surfacing - Methods of test for determination of impact attenuation
• Effective Date: 28-Jan-2026
• Refers: EN ISO 17201-6:2022 - Acoustics - Noise from shooting ranges - Part 6: Sound pressure measurements close to the source for determining exposure to sound (ISO 17201-6:2021)
• Effective Date: 28-Jan-2026
• Refers: EN ISO 16773-4:2017 - Electrochemical impedance spectroscopy (EIS) on coated and uncoated metallic specimens - Part 4: Examples of spectra of polymer-coated and uncoated specimens (ISO 16773-4:2017)
• Effective Date: 28-Jan-2026
• Refers: EN 13001-3-5:2025 - Cranes - General design - Part 3-5: Limit states and proof of competence of forged and cast hooks
• Effective Date: 28-Jan-2026
• Refers: EN 14420-7:2022/AC:2023 - Hose fittings with clamp units - Part 7: Cam locking couplings
• Effective Date: 28-Jan-2026
• Refers: EN ISO 22718:2015/A1:2022 - Cosmetics - Microbiology - Detection of Staphylococcus aureus - Amendment 1 (ISO 22718:2015/Amd 1:2022)
• Effective Date: 28-Jan-2026
• Refers: CEN/TS 15867:2009 - Advanced technical ceramics - Ceramic composites - Guide to the determination of the degree of misalignment in uniaxial mechanical tests
• Effective Date: 28-Jan-2026
• Consolidated By: ISO 3262-21:2023 - Extenders — Specifications and methods of test — Part 21: Silica sand (unground natural quartz)
• Effective Date: 12-Feb-2026

Overview

EN ISO 3262-21:2023 - Extenders – Specifications and Methods of Test – Part 21: Silica Sand (Unground Natural Quartz) is a European standard developed by CEN that outlines comprehensive requirements and test methods for silica sand, specifically focusing on unground natural quartz. This document is designed to support quality assurance for manufacturers, suppliers, and users in industries where silica sand is used as an extender in pigments and related products.

By standardizing the specifications, this standard ensures consistency, reliability, and safety in the application of unground silica sand as a raw material. With requirements and test procedures harmonized across Europe and internationally, EN ISO 3262-21:2023 replaces earlier versions and aligns with the latest industry needs.

Keywords: silica sand standard, EN ISO 3262-21:2023, unground natural quartz, silica sand test methods, extenders specification

Key Topics

• Scope and Definitions:
  The standard applies to silica sand consisting of unground natural quartz and covers terminology aligned with ISO 18451-1.

• Essential Requirements:
  It defines minimum thresholds for key properties, such as:

  • Quartz and silica content
  • Matter volatile at 105 °C
  • Loss on ignition
  • pH value of aqueous suspension
  • Matter soluble in water

• Conditional Requirements:
  Additional properties addressed as needed, including:

  • Residue on sieve
  • Colour and lightness (to be agreed by interested parties)
  • Resistivity of aqueous extract

• Test Methods:
  Specific ISO standards referenced for testing, including:

  • X-ray diffraction and fluorescence for composition
  • ISO 787 series for volatiles, pH, solubility, residue, and resistivity
  • Sampling per ISO 15528

• Reporting:
  Detailed criteria for test report content to assure transparency and traceability.

Applications

EN ISO 3262-21:2023 is vital for several industrial sectors and practical applications, primarily in the production and quality control of materials where silica sand is used as an extender, including:

• Pigments and Paints:
  Guarantees consistent performance and compatibility in pigments, paints, and coatings by standardizing silica sand properties.

• Construction Materials:
  Ensures silica sand used in mortars, plasters, and concrete products meets clear quality benchmarks.

• Industrial Manufacturing:
  Supports industries requiring high-purity silica sand for glass production, ceramics, and metallurgy by specifying purity and test practices.

• Regulatory and Trade Compliance:
  Facilitates market access and regulatory compliance across European and international markets by adhering to harmonized standards.

Related Standards

To fully implement EN ISO 3262-21:2023 and its referenced testing methods, the following related documents are essential:

• ISO 3262-1: Introduction and general methods for extenders
• ISO 787 Series: Various general methods for pigments and extenders, including determination of volatiles, solubility, residue, pH, and resistivity
• ISO 3696: Specification and test methods for laboratory-grade water
• ISO 15528: Sampling for paints, varnishes, and raw materials
• ISO 18451-1: Terminology for pigments, dyestuffs, and extenders

By applying these standards together, organizations ensure comprehensive quality assurance and harmonized practices for silica sand and related extenders in a broad range of industrial contexts.

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EN ISO 3262-21:2023 is a reference point for all professionals involved in the supply, testing, and use of unground natural quartz silica sand, promoting quality, interoperability, and safety across multiple applications.

Standards Content (Sample)

SLOVENSKI STANDARD
01-oktober-2023
Nadomešča:
SIST EN ISO 3262-21:2001
Polnila - Specifikacije in preskusne metode - 21. del: Kremenov pesek (nemleti
naravni kremen) (ISO 3262-21:2023)
Extenders - Specifications and methods of test - Part 21: Silica sand (unground natural
quartz) (ISO 3262-21:2023)
Füllstoffe - Anforderungen und Prüfverfahren - Teil 21: Quarzsand (ungemahlener
natürlicher Quarz) (ISO 3262-21:2023)
Matières de charge - Spécifications et méthodes d’essai - Partie 21: Sable de silice
(quartz naturel non concassé) (ISO 3262-21:2023)
Ta slovenski standard je istoveten z: EN ISO 3262-21:2023
ICS:
87.060.10 Pigmenti in polnila Pigments and extenders
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 3262-21
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2023
EUROPÄISCHE NORM
ICS 87.060.10 Supersedes EN ISO 3262-21:2000
English Version
Extenders - Specifications and methods of test - Part 21:
Silica sand (unground natural quartz) (ISO 3262-21:2023)
Matières de charge - Spécifications et méthodes d'essai Füllstoffe - Anforderungen und Prüfverfahren - Teil 21:
- Partie 21: Sable de silice (quartz naturel non Quarzsand (ungemahlener natürlicher Quarz) (ISO
concassé) (ISO 3262-21:2023) 3262-21:2023)
This European Standard was approved by CEN on 22 March 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 COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 3262-21:2023 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 3262-21:2023) has been prepared by Technical Committee ISO/TC 256
"Pigments, dyestuffs and extenders" in collaboration with Technical Committee CEN/TC 298 “Pigments
and extenders” 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 December 2023, and conflicting national standards
shall be withdrawn at the latest by December 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 ISO 3262-21:2000.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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,
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.
Endorsement notice
The text of ISO 3262-21:2023 has been approved by CEN as EN ISO 3262-21:2023 without any
modification.
INTERNATIONAL ISO
STANDARD 3262-21
Second edition
2023-05
Extenders — Specifications and
methods of test —
Part 21:
Silica sand (unground natural quartz)
Matières de charge — Spécifications et méthodes d’essai —
Partie 21: Sable de silice (quartz naturel non broyé)
Reference number
ISO 3262-21:2023(E)
ISO 3262-21:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
ISO 3262-21:2023(E)
Contents  Page
Foreword .iv
1  Scope . 1
2  Normative references . 1
3  Terms and definitions . 1
4  Requirements and test methods . 2
5  Sampling . 2
6  Determination of silica content . 2
6.1 Principle . 2
6.2 Reagents . 2
6.3 Apparatus . 3
6.4 Procedure . 3
6.4.1 Number of determinations . 3
6.4.2 Test portion . 3
6.4.3 Determination . 3
6.5 Expression of results . . 4
6.6 Precision . . . 4
7  Test report . 4
iii
ISO 3262-21:2023(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally c
...