Hygrothermal performance of building materials and products - Determination of water absorption coefficient by partial immersion (ISO 15148:2002)

This standard specifies a method for determining, by partial immersion with no temperature gradient, the short-term liquid water absorption coefficient. It is intended to assess the rate of absorption of water, by capillary action from continuous or driving rain during on site storage or construction, by insulating and other materials, which are normally protected. The method is suitable for renders or coatings tested in conjunction with the substrate on which they are normally mounted.
It is not intended to assess the absorption of water by materials used under water or in overall contact with saturated ground, where a total immersion test is more appropriate.

Wärme- und feuchtetechnisches Verhalten von Baustoffen und Bauprodukten - Bestimmung des Wasseraufnahmekoeffizienten bei teilweisem Eintauchen (ISO 15148:2002)

Diese Norm legt ein Verfahren zur Bestimmung des Wasseraufnahmekoeffizienten für kurze Zeiträume durch teilweises Eintauchen ohne Temperaturgradienten fest. Sie dient zur Beurteilung der Intensität der Wasseraufnahme aufgrund von Kapillarkräften bei anhaltender Beregnung oder Schlagregen, auch im unüblichen Fall während einer ungeschützten Lagerung von Dämm- oder anderen Baustoffen auf der Baustelle oder während der Bauphase. Das Verfahren ist geeignet für die Prüfung von Putzen oder Beschichtungen in Verbindung mit dem Untergrund, auf den sie normalerweise aufgebracht werden.
Das Verfahren gilt nicht zur Beurteilung der Wasseraufnahme von Baustoffen, die unter Wasser eingesetzt werden oder in Kontakt mit feuchtegesättigtem Erdreich stehen. Für diese Fälle ist eine Prüfung bei vollständigem Eintauchen besser geeignet.

Performance hygrothermique des matériaux et produits pour le bâtiment - Détermination du coefficient d'absorption d'eau par immersion partielle (ISO 15148:2002)

L'ISO 15148:2002 prescrit une méthode permettant de déterminer le coefficient d'absorption d'eau liquide à court terme, par immersion partielle sans gradient de température. Elle vise à évaluer la vitesse d'absorption d'eau par action capillaire lors de pluies continues ou battantes pendant le stockage sur chantier ou la construction sur des matériaux d'isolation ou autres qui sont normalement protégés. Cette méthode est applicable à des enduits ou revêtements qui sont soumis à essai avec le support sur lequel ils sont normalement appliqués.
Elle n'est pas destinée à l'évaluation de l'absorption d'eau par des matériaux utilisés sous l'eau ou en contact avec des sols saturés, pour lesquels un essai par immersion totale est plus approprié.

Higrotermalne lastnosti gradbenih materialov in proizvodov – Ugotavljanje koeficienta navzemanja z vodo z metodo delne potopitve (ISO 15148:2002)

Ta standard določa metodo za ugotavljanje kratkotrajnega tekočega koeficienta navzemanja z vodo prek delne potopitve brez temperaturnega gradienta. Namenjen je za ocenjevanje količine absorpcije vode prek kapilarnega vpijanja pri neprekinjenem ali močnem dežju med hrambo na mestu vgradnje ali izdelavo ter prek izolacijskih in drugih materialov, ki so običajno zaščiteni. Metoda je ustrezna za omete ali premaze, ki so preskušeni skupaj s podlago, na katero so običajno naneseni.
Ta standard ni namenjen za ocenjevanje absorpcije vode za materiale, ki se uporabljajo pod vodo ali so v splošnem stiku z nasičenimi tlemi, za katere je ustreznejši preskus s popolnim potapljanjem.

General Information

Status
Published
Publication Date
30-Nov-2002
Current Stage
9093 - Decision to confirm - Review Enquiry
Completion Date
07-Feb-2008

RELATIONS

Buy Standard

Standard
EN ISO 15148:2003
English language
16 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN ISO 15148:2003
01-december-2003
Higrotermalne lastnosti gradbenih materialov in proizvodov – Ugotavljanje
koeficienta navzemanja z vodo z metodo delne potopitve (ISO 15148:2002)

Hygrothermal performance of building materials and products - Determination of water

absorption coefficient by partial immersion (ISO 15148:2002)
Wärme- und feuchtetechnisches Verhalten von Baustoffen und Bauprodukten -
Bestimmung des Wasseraufnahmekoeffizienten bei teilweisem Eintauchen (ISO
15148:2002)

Performance hygrothermique des matériaux et produits pour le bâtiment - Détermination

du coefficient d'absorption d'eau par immersion partielle (ISO 15148:2002)
Ta slovenski standard je istoveten z: EN ISO 15148:2002
ICS:
91.100.01 Gradbeni materiali na Construction materials in
splošno general
91.120.30 =DãþLWDSUHGYODJR Waterproofing
SIST EN ISO 15148:2003 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN ISO 15148:2003
---------------------- Page: 2 ----------------------
SIST EN ISO 15148:2003
EUROPEAN STANDARD
EN ISO 15148
NORME EUROPÉENNE
EUROPÄISCHE NORM
December 2002
ICS 91.100.01
English version
Hygrothermal performance of building materials and products -
Determination of water absorption coefficient by partial
immersion (ISO 15148:2002)

Performance hygrothermique des matériaux et produits Wärme- und feuchtetechnisches Verhalten von Baustoffen

pour le bâtiment - Détermination du coefficient d'absorption und Bauprodukten - Bestimmung des

d'eau par immersion partielle (ISO 15148:2002) Wasseraufnahmekoeffizienten bei teilweisem Eintauchen

(ISO 15148:2002)
This European Standard was approved by CEN on 24 June 2002.

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 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 Management Centre has the same status as the official

versions.

CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,

Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.

EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2002 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 15148:2002 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN ISO 15148:2003
EN ISO 15148:2002 (E)
Contents
page

Foreword......................................................................................................................................................................3

Introduction .................................................................................................................................................................4

1 Scope ......................................................................................................................................................................4

2 Normative references............................................................................................................................................5

3 Terms and definitions ...........................................................................................................................................5

4 Principle..................................................................................................................................................................6

5 Apparatus...............................................................................................................................................................6

6 Test specimens......................................................................................................................................................6

7 Procedure...............................................................................................................................................................7

8 Calculation and expression of results ................................................................................................................9

9 Accuracy of measurement..................................................................................................................................11

10 Test report ..........................................................................................................................................................11

Annex A (informative) Liquid transport phenomena in building materials .......................................................13

Annex ZA (normative) Normative references to international publications with their relevant

European publications .............................................................................................................................................15

Bibliography ..............................................................................................................................................................16

---------------------- Page: 4 ----------------------
SIST EN ISO 15148:2003
EN ISO 15148:2002 (E)
Foreword

This document EN ISO 15148:2002 has been prepared by Technical Committee CEN/TC 89 "Thermal

performance of buildings and building components", the secretariat of which is held by SIS, in collaboration with

Technical Committee ISO/TC 163 "Thermal insulation".

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 2003, and conflicting national standards shall be withdrawn at the latest by

June 2003.

This standard is one of a series of standards which specify test methods for the thermal and moisture related

properties of building materials and products.

NOTE Normative references to International Standards are listed in annex ZA (normative).

Annex A is informative, annex ZA is normative.

According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following

countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland,

France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Spain,

Sweden, Switzerland and the United Kingdom.
---------------------- Page: 5 ----------------------
SIST EN ISO 15148:2003
EN ISO 15148:2002 (E)
Introduction

The movement of moisture within hygroscopic capillary building materials is a combination of vapour and liquid

flows which have complex interactions with the temperature and humidity gradients and the properties of the

materials present. Three stages can be identified.

a) At very low humidities transport is by vapour diffusion alone and the permeability can be derived from dry-cup

tests, defined in ISO 12572.

b) At higher relative humidities in the hygroscopic region, up to about 95 % relative humidity, there is a mixture of

gas and water filled pores with simultaneous flows of vapour and liquid. The increasing liquid flow causes the

exponentially increasing permeability measured by cup tests under isothermal conditions. However, under

practical, non-isothermal conditions this liquid flow could increase, or decrease, the total mass flow.

c) Above about 95 % relative humidity, depending on the material, the total mass transport is governed by transport

in the liquid phase. This is the situation that arises when a material is dipped in water or severely wetted e.g. by

driving rain. The water moves under the hydraulic pressure, the negative suction pressure. After the water

source is removed, the hydraulic pressure ceases and the liquid is redistributed within the material at a different

rate (stages b) and c) do not necessarily apply to all hygroscopic materials).

Methods are currently being developed in research laboratories to quantify capillary transport and measure the

relevant coefficients. At present, however, these involve sophisticated measuring techniques such as gamma ray

and neutron absorption or Nuclear Magnetic Resonance (NMR) spectroscopy together with complex mathematical

methods to analyse the results: comparisons between laboratories have shown that further work is needed to

develop standard techniques. It will, therefore, be a number of years before it is possible to standardise such

methods - see annex A for further information.

At present it is possible to standardise the measurement of the absorption of liquid water into the surface of a

material, which gives an indicator of its liquid transport performance.
1 Scope

This European Standard specifies a method for determining, by partial immersion with no temperature gradient, the

short-term liquid water absorption coefficient. It is intended to assess the rate of absorption of water, by capillary

action from continuous or driving rain during on site storage or construction, by insulating and other materials,

which are normally protected. The method is suitable for renders or coatings tested in conjunction with the

substrate on which they are normally mounted.

It is not intended to assess the absorption of water by materials used under water or in overall contact with

saturated ground, where a total immersion test is more appropriate.
---------------------- Page: 6 ----------------------
SIST EN ISO 15148:2003
EN ISO 15148:2002 (E)
2 Normative references

This European Standard incorporates by dated or undated reference, provisions from other publications. These

normative references are cited at the appropriate places in the text, and the publications are listed hereafter.

For dated references, subsequent amendments to or revisions of any of these publications apply to this

European Standard only when incorporated in it by amendment or revision. For undated references the latest

edition of the publication referred to applies (including amendments).

ISO 9346, Thermal insulation - Mass transfer - Physical quantities and definitions.

3 Terms and definitions
3.1 Definitions

For the purposes of this European Standard, the terms and definitions given in ISO 9346 and the following apply.

3.1.1
water absorption coefficient

mass of water absorbed by a test specimen per face area and per square root of time

NOTE See equation (2) in clause 8.
3.1.2
homogeneous material
material the properties of which are uniform on a macroscopic scale
3.2 Symbols and units
Symbol Quantity Unit
A face area m
2 0,5
A water absorption coefficient kg/(m ·s )
2 0,5
A water absorption coefficient related to a kg/(m ·s )
specific time, t, in seconds
mass gain per face area after time t kg/mDm
initial mass of specimen kg
m mass of specimen after time t kg
time s or h
2 0,5
W water absorption coefficient kg/(m ·h )
2 0,5
water absorption coefficient related to a kg/(m ·h )
specific time, t, in hours

NOTE Water absorption coefficient is defined in terms of seconds in EN ISO 9346. The alternative definition in terms of hours

is widely used.
---------------------- Page: 7 ----------------------
SIST EN ISO 15148:2003
EN ISO 15148:2002 (E)
4 Principle

The water absorption by partial immersion is determined by measuring the change in mass of the test specimen,

the bottom surface of which is in contact with water, over a period which is usually at least 24 h.

The water adhering to the surface and not absorbed by the product is completely removed by, for example, blotting

with a sponge before the specimen is weighed.
5 Apparatus
The test apparatus shall include:

a) balance, capable of weighing a test specimen to an accuracy of ± 0,1 % of the mass of the specimen;

b) water tank with a device for keeping the water level constant to – 2 mm and a device to keep the test specimen

in position. The tank shall include point supports, which do not damage the specimen, to keep the specimen at

least 5 mm clear of the base;
c) timer accurate to at least one second in 24 h.
6 Test specimens
6.1 Shape of test specimens

Test specimens shall be representative of the material or product and of regular shape with constant cross section

to ensure one dimensional water flow. The faces shall be free from surface irregularities.

6.2 Dimensions of test specimens
6.2.1 Area

The water contact area of each test specimen shall be at least 50 cm . However, in the case of materials including

macroscopic particles such as aggregates, the side of a square specimen or the smallest diameter of the face shall

be at least ten times the largest particle size.

NOTE Larger specimens, preferably with a face area of at least 100 cm , are advised as they will lead to greater accuracy.

6.2.2 Thickness

Where possible, the specimen thickness should be the full product thickness. When specimens are cut from

products they shall be representative of the material to be assessed and thick enough to enable handling without

damage. In the case of materials including macroscopic particles such as aggregates, the thickness should be

preferably at least ten times, but shall be no less than five times, the largest particle size.

6.3 Number of test specimens
At least three specimens shall be tested.

If the water contact area of the individual specimens is less than 100 cm , at least six specimens shall be tested

representing a total area of at least 300 cm .
---------------------- Page: 8 ----------------------
SIST EN ISO 15148:2003
EN ISO 15148:2002 (E)
6.4 Preparation of test specimens

Test specimens shall be representative of the whole material and shall be cut so that they do not include product

edges. In the case of materials known to be non-isotropic, sets of test specimens shall be prepared in all

orientations of the potential use of the material.

The test specimens shall be prepared by methods that do not change the original structure of the product; any

skins, facings or coatings shall be retained. In the case of products such as coatings, thin rendering or plasterwork

that are normally adhered to a substrate in use, specimens shall be made up from the product and a normal

substrate combined. The total thickness then is the sum of the coating and the substrate.

The sides of a solid specimen shall be sealed with a water and vapour tight sealant that does not react chemically

with it or significantly penetrate the pores of the product. It is especially important that the sides of specimens with

surface coatings are sealed to prevent bypassing of the coating.

If sealing is not possible in the case of very low density fibrous or loose fill materials, they may be placed in a tightly

fitting tube supported on a wire mesh placed over the mouth of the tube. The open area of the mesh shall be as

large as possible while completely supporting the sample during the whole course of the test. In this case, to

minimise the edge effects, the face area of the specimen shall be at least 100 cm .

The surface in contact with the water shall be plane, allowing for the normal surface roughness of the material.

6.5 Conditioning of test specimens

The test specimens shall be stored under the test conditions (see 7.1) until the mass of each specimen has

stabilised to within 0,1 % of its total mass, when measured over 24 h.
NOTE Further
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.