Bsi bs en 01849 2 2009 (2010)

Unknown BS EN 1849 2 2009 ICS 91 100 50 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BRITISH STANDARD Flexible sheets for waterproofing — Determination of thickness and mass[.]

BS EN 1849-2:2009

ICS 91.100.50

NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW

BRITISH STANDARD

Flexible sheets for

waterproofing —

Determination of

thickness and mass per

unit area

Part 2: Plastic and rubber sheets

This British Standard

was published under the

authority of the Standards

Policy and Strategy

Committee on 30 June

2010

© BSI 2010

ISBN 978 0 580 59214 0

Amendments/corrigenda issued since publication

Date Comments

National foreword

This British Standard is the UK implementation of EN 1849-2:2009 It supersedes BS EN 1849-2:2001 which is withdrawn

The UK participation in its preparation was entrusted to Technical Committee B/546/2, Plastics and rubber sheets for Waterproofing

A list of organizations represented on this committee 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.

BS EN 1849-2:2009

EUROPEAN STANDARD

NORME EUROPÉENNE

EUROPÄISCHE NORM

December 2009

ICS 91.100.50 Supersedes EN 1849-2:2001

English Version

Flexible sheets for waterproofing - Determination of thickness

and mass per unit area - Part 2: Plastic and rubber sheets

Feuilles souples d'étanchéité - Détermination de l'épaisseur

et de la masse surfacique - Partie 2: Feuilles d'étanchéité

de toiture plastiques et élastomères

Abdichtungsbahnen - Bestimmung der Dicke und der flächenbezogenen Masse - Teil 2: Kunststoff- und Elastomerbahnen für Dachabdichtungen

This European Standard was approved by CEN on 19 October 2009

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

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E FÜ R N O R M U N G

Management Centre: Avenue Marnix 17, B-1000 Brussels

© 2009 CEN All rights of exploitation in any form and by any means reserved

worldwide for CEN national Members

Ref No EN 1849-2:2009: E

2

Foreword 3

Introduction 4

1 Scope 5

2 Normative references 5

3 Terms and definitions 5

4 Sampling 7

5 Determination of thickness 7

5.1 Principle 7

5.2 Apparatus 7

5.3 Test specimens 7

5.4 Procedure 7

5.4.1 General 7

5.4.2 Mechanical measurement 8

5.4.3 Optical measurement 8

5.5 Expression of results 8

6 Determination of mass per unit area 9

6.1 Principle 9

6.2 Apparatus 9

6.3 Test specimens 9

6.4 Procedure 9

6.5 Expression of results 9

7 Test report 9

Annex A (informative) Example of the cut cross-section of a membrane 10

BS EN 1849-2:2009

EN 1849-2:2009 (E)

3

Foreword

This document (EN 1849-2:2009) has been prepared by Technical Committee CEN/TC 254 “Flexible sheets for waterproofing”, 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 June 2010, and conflicting national standards shall

be withdrawn at the latest by June 2010

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

This document supersedes EN 1849-2:2001

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 the United Kingdom

4

Introduction

This European Standard is intended for characterisation of plastic and rubber sheets as manufactured

or supplied before use This test method relates exclusively to products or to their components where appropriate, and not to waterproofing membrane systems composed of such products and installed in the works

This test is intended to be used in conjunction with EN 13956, Flexible sheet for waterproofing —

Plastic and rubber sheets for roof waterproofing — Definitions and characteristics

BS EN 1849-2:2009

EN 1849-2:2009 (E)

5

1 Scope

This European Standard specifies methods for the determination of the thickness and mass per unit area of plastic and rubber sheets for roof waterproofing

The following referenced documents are indispensable for the application of this document For dated references, only the edition cited applies For undated references, the latest edition of the referenced document (including any amendments) applies

EN 13416, Flexible sheets for waterproofing — Bitumen, plastic and rubber sheets for roof

waterproofing — Rules for sampling

3 Terms and definitions

For the purposes of this document, the following terms and definitions apply

3.1

surface texture

textured pattern on one or both surfaces of the sheet creating a difference between the effective and overall thickness not exceeding 0,15 mm

NOTE See Figure 2 a) and c)

3.2

surface profile (surface structure)

raised area on the surface of the sheet creating a difference between the effective and overall thickness exceeding 0,15 mm

NOTE See Figure 2 b)

3.3

internal fabric

layer of woven or non-woven fabric of synthetic or mineral fibres incorporated in the sheet This layer may or may not constitute reinforcement

NOTE See Figure 1 c)

3.4

backing

layer of woven or non-woven fabric of synthetic or mineral fibres or other materials, fixed to the bottom

of the sheet

NOTE see Figure 2 d)

3.5

overall thickness

d

thickness of the sheet excluding any surface profile

6

3.6

effective thickness

thickness of the sheet providing the waterproofing function including any surface texture but excluding any surface profile and backing

a)

c)

b)

Key

a) homogeneous single layer sheet

b) multi-layer sheet

c) sheet with internal fabric

Figure 1 — Structure of the sheet

deff

deff

deff

Key

a) sheet with surface texture on one side

b) sheet with surface profiles

c) sheet with surface texture on both sides

d) sheet with backing

Figure 2 — Types of surfaces

BS EN 1849-2:2009

EN 1849-2:2009 (E)

7

4 Sampling

Test samples shall be taken in accordance with EN 13416

5 Determination of thickness

5.1 Principle

The thickness is determined by a mechanical device unless there is a hindrance by a surface profile and/or backing In this case, optical measurement shall be used

5.2 Apparatus

5.2.1 Measuring device

Capable of indicating the thickness to an accuracy of 0,01 mm The measuring surfaces shall be planar and have a diameter of (10 ± 0,05) mm exerting a pressure of (20 ± 10) kPa on the sheet surface

NOTE The determination of thickness according to EN 12311-2 may also be done with a measuring diameter of (5 ± 0,05) mm exerting a pressure of (20 ± 10) kPa on the sheet surface for the dumbbell type

5.2.2 Optical device

For sheets with a surface profile and/or backing, capable of indicating the thickness to an accuracy of 0,01mm

5.3 Test specimens

The test specimens shall be square or circular in form, and have an area of (10 000 ± 100) mm2 Cut

from the sheet n test specimens (see Table 1) evenly divided over the width b of the sheet, the outer

specimen (100 ± 10) mm from the edges (see Figure 3)

Table 1 — Required number of test specimens

Width of the sheet

1 701

to

2 200

2 201

to

2 700

2 701

to

3 200

3 201

to

3 700

3 701

to

4 200

4 201

to

4 700 > 4 701 Number of test

specimens

5.4 Procedure

5.4.1 General

Condition the sample for at least 2 h at (23 ± 2) °C and (50 ± 5) % relative humidity immediately before measuring

Ensure that the sample and the faces of the measuring device are free from contamination for example dust

8

Record all relevant thicknesses of the sheet once per test specimen to 0,01 mm Calculation of the mean value and standard deviation is based on the readings of all test specimens

Dimensions in millimetres

2

2

1

2

b

Key

1 test piece

2 test specimen

b width of the sheet

x constant distance between test specimens

Figure 3 — Example of cutting plan for 3 test specimens 5.4.2 Mechanical measurement

Check the zero point of the measuring device before starting the measurements and recheck after each series of measurements

When determining the thickness, lower the foot gently to avoid deforming the material

5.4.3 Optical measurement

Measure optically the thickness of a sheet with any surface profile and/or backing The small specimens for optical measurements should not be longer than 10 mm The small specimen shall be cut with a razor-sharp knife from each test specimen The cut cross section of the specimen shall be installed in an angle of (90 ± 5)° to the direction of viewing, using a microscope

5.5 Expression of results

The overall thickness (d) shall be stated as the mean thickness of all test specimens

The effective thickness (deff) shall be stated as the mean thickness of all test specimens without taking into account any surface profile and/or backing

BS EN 1849-2:2009

EN 1849-2:2009 (E)

9

State all the results of sheet thickness and standard deviation to the nearest 0,01 mm

NOTE Annex A shows an example of a cross-section of a cut membrane

6 Determination of mass per unit area

6.1 Principle

The mass per unit area is determined by weighing a test specimen of known area (The same specimens as used for determination of thickness may be used)

6.2 Apparatus

Balance capable of indicating sample weight to an accuracy of 0,01 g

6.3 Test specimens

The test specimens shall be square or circular in form, and have an area of (10 000 ± 100) mm2

Cut from the sheet n test specimens (see Table 1) evenly divided over the width b of the sheet, the outer

specimen (100 ± 10) mm from the edges (see Figure 3)

6.4 Procedure

Condition the test specimens for 20 h at (23 ± 2) °C and (50 ± 5) % relative humidity immediately before weighing

Weigh the test specimens to the nearest 0,01 g and calculate the mass per unit area, in g/m2

6.5 Expression of results

The mass per unit area shall be stated as the mean of the calculated values in g/m2 rounded to the nearest 5 g/m2

The test report shall contain at least the following information:

a) reference to this document (EN 1849-2) and any deviation from it;

b) all details necessary to identify the product tested;

c) information on sampling in accordance with Clause 4;

d) number of specimens tested;

e) conditioning atmosphere used;

f) presser-foot size for mechanical measurement of the thickness;

g) details of preparation of test specimens in accordance with 5.3, 5.4.3 and 6.3 respectively;

h) test results (mean values and standard deviation to the nearest 0,01 mm) in accordance with 5.5 and 6.5 respectively;

i) any non-standard procedures or any peculiarities encountered during testing;

j) date of testing

10

Annex A

(informative)

Example of the cut cross-section of a membrane

2

deff

1 mm

Key

deff effective thickness

Figure A1 — Cross-section of a fleece backed membrane at 20X magnification cut with a razor

blade

NOTE Experience has shown that a magnification of 10X to 20X is sufficient for this test

BS EN 1849-2:2009

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