1、BRITISH STANDARD BS EN 1015-19:1999 Incorporating Amendment No. 1 Methods of test for mortar for masonry Part 19: Determination of water vapour permeability of hardened rendering and plastering mortars The European Standard EN 1015-19:1998, with the incorporation of amendment A1:2004, has the status
2、 of a British Standard ICS 91.100.19 BS EN 1015-19:1999 This British Standard, having been prepared under the direction of the Sector Committee for Building and Civil Engineering, was published under the authority of the Standards Committee and comes into effect on 15 January 1999 BSI 25 November 20
3、04 ISBN 0 580 30750 6 National foreword This British Standard is the official English language version of EN 1015-19:1998, including amendment A1:2004 (incorporating CEN letter of correction October 2004). It is included in a package of standards declared by CEN/TC 125 and it is intended that it wil
4、l partially supersede BS 4551, Methods of testing mortars, screeds and plasters, BS 4551-1:1998, Physical testing, the equivalent test method of which will be withdrawn on 30 September 2000. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“. Tags ind
5、icating changes to CEN text carry the number of the CEN amendment. For example, text altered by CEN amendment 1 is indicated by !“. The UK participation in its preparation was entrusted by Technical Committee B/519, Masonry and associated testing, to Subcommittee B/519/2, Mortar, which has the respo
6、nsibility to: A list of organizations represented on this subcommittee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled
7、“International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance wit
8、h a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and Euro
9、pean developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 8, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Ame
10、ndments issued since publication Amd. No. Date Comments 15421 25 November 2004 See national forewordEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 1015-19 September 1998 +A1 October 2004 ICS 91.100.10 Descriptors: masonry work, mortars: materials, tests, water vapour flux, water vapour permeab
11、ility English version Methods of test for mortar for masonry Part 19: Determination of water vapour permeability of hardened rendering and plastering mortars (includes amendment A1:2004) Mthodes dessai des mortiers pour maonnerie Partie 19: Dtermination de la permabilit la vapeur deau des mortiers d
12、enduits durcis (inclut lamendement A1:2004) Prfverfahren fr Mrtel fr Mauerwerk Teil 19: Bestimmung der Wasserdampfdurchlssigkeit von Festmrteln aus Putzmrteln (enthlt nderung A1:2004) This European Standard was approved by CEN on 4September1998; amendment A1 was approved by CEN on 6 August 2004. CEN
13、 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 appl
14、ication to the Central Secretariat 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 Central Secretariat has
15、the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slov
16、akia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Management Centre: rue de Stassart, 36 B-1050 Brussels 1998 CEN All rights of exploitation in any form and by any means reserved wor
17、ldwide for CEN national Members. Ref. No. EN 1015-19:1998 + A1:2004 EEN 1015-19:1998 BSI 25 November 2004 2 Foreword This European Standard has been prepared by Technical Committee CEN/TC 125, Masonry, the Secretariat of which is held by BSI. This European Standard shall be given the status of a nat
18、ional standard, either by publication of an identical text or by endorsement, at the latest by March 1999, and conflicting national standards shall be withdrawn at the latest by September 2000. This European Standard has been prepared under a mandate given to CEN by the European Commission and the E
19、uropean Free Trade Association and supports the essential requirements of the EU Construction Products Directive (89/106/EEC) and includes the performance requirements referred to in the Eurocode for masonry structures. According to the CEN/CENELEC Internal Regulations, the national standards organi
20、zations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment
21、A1 This document EN 1015-19:1998/A1:2004 has been prepared by Technical Committee CEN/TC 125, Masonry, 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 Apri
22、l 2005, and conflicting national standards shall be withdrawn at the latest by July 2006. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmar
23、k, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword 2 1S c o p e 3 2 Normative references 3 3P r i n
24、c i p l e 3 4 Definitions and symbols 4 5 Apparatus and reagents 4 6 Sampling, preparation and storage of test samples 5 7 Procedure 6 8 Calculation and expression of results 6 9 Test report 8EN 1015-19:1998 BSI 25 November 2004 3 1 Scope This European Standard specifies a method for determining the
25、 steady state water vapour permeability of rendering and plastering mortars in accordance with prEN 998-1 at the upper and lower part of the hygroscopic range. The test method is applicable to mortars from which disc shaped specimens of uniform thickness between 10 mm and 30 mm can be made. 2 Normat
26、ive 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 a
27、ny 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. prEN 998-1, Specification for mortar for masonry Part 1: Rendering and plastering mortar with inorganic bi
28、nding agents. prEN 1015-2, Methods of test for mortar for masonry Part 2: Sampling of mortars and preparation of test mortars. prEN 1015-3, Methods of test for mortar for masonry Part 3: Determination of consistence of fresh mortar (by flow table). prEN 1015-11, Methods of test for mortar for masonr
29、y Part 11: Determination of flexural and compressive strength of hardened mortar. 3 Principle Specimens to be tested are sealed on the open mouth of circular cups in which the water vapour pressure is maintained constant at appropriate levels by means of saturated salt solutions. The cups are placed
30、 in a temperature controlled environment with a constant water vapour pressure different from that inside the cups. The rate of moisture transfer is determined from the change in weight of the cups under steady state conditions. EN 1015-19:1998 4 BSI 25 November 2004 4 Definitions and symbols 4.1 De
31、finitions For the purposes of this standard the following definitions apply. 4.1.1 water vapour permeance the water vapour flux passing through a unit area under equilibrium conditions per unit difference in water vapour pressure between the two sides of the material 4.1.2 water vapour permeability
32、the water vapour permeance multiplied by the thickness of the specimen 4.2 Symbols 5 Apparatus and reagents 5.1 Circular test cup, made of corrosion resistant material and with an open mouth with an area of approximately 0,02 m 2to which the test specimen is sealed, see Figure 1. 5.2 Weighing instru
33、ment, capable of weighing up to 2 kg with an accuracy of !0,1 g “. 5.3 An appropriate sealant, which is impermeable and whose mass remains unchanged during the period of the test. 5.4 Saturated solution of potassium nitrate (KNO 3 ). NOTE This provides a relative humidity of 93,2 % at a temperature
34、of 20 C. 5.5 Saturated solution of lithium chloride (LiCl). NOTE This provides a relative humidity of 12,4 % at a temperature of 20 C. 5.6 Storage chambers, capable of maintaining a temperature of 20 C2 C and relative humidities of 95 % 5 % and/or 50 % 5 % (see 7.2). 5.7 Trowel or palette knife. 5.8
35、 Cotton gauze. !5.9 Measuring device, capable of measuring the specimen thickness with an accuracy of 0,2 mm. “ A is the area of the open mouth of the test cup, (m 2 ); % p is the difference in water vapour pressure between the ambient air and the salt solution and is taken from appropriate tables,
36、(Pa); %G/ %t is the water vapour flux, (kg/s); 3 is the water vapour permeance, (kg/m 2 s Pa); R A is the water vapour resistance of the air gap between the specimen and the salt solution, (0,048 10 9Pa m 2 s/kg per 10 mm air gap); !t is the specimen thickness (m); W vp is the water vapour permeabil
37、ity (kg/m s Pa). “EN 1015-19:1998 BSI 25 November 2004 5 6 Sampling, preparation and storage of test samples 6.1 Sampling The fresh mortar test sample shall have a minimum volume of 1,5 l or at least 1,5 times the quantity needed to perform the test, whichever is the greater, and shall either be obt
38、ained by reduction of the bulk test sample (see prEN 1015-2) using a sample divider or by quartering or by preparation from dry constituents and water in the laboratory. The flow value of the mortar in the bulk test sample shall be determined in accordance with prEN 1015-3 and reported. Laboratory m
39、ixed test samples shall, before testing, be brought to a defined flow value as specified in prEN 1015-2. Ready to use mortars (factory-made wet mortars which are retarded), and pre-batched air-lime/sand wet mortars when not gauged with hydraulic binders, shall be tested within their specified workab
40、le life. The length of mixing period shall be measured from the moment all the constituents are introduced into the mixer. Before testing, the batch shall be gently stirred by hand using a trowel or palette knife (5.7) for 5 s to 10 s to counteract any false setting etc., but without any additional
41、mixing of the batch. Any deviation from the mixing procedure shall be noted. One test sample shall be tested. 6.2 Preparation and storage of test samples Produce test specimens by applying mortar to a substrate of autoclaved aerated concrete with a density of 550 kg/m 35 0k g / m 3 . Place two layer
42、s of cotton gauze on the substrate before application. For each hygroscopic range prepare five test specimens of the required thickness, somewhat larger than the diameter of the test cups (5.1) and cure for 28 days prior to testing. Place the test specimens in the storage chamber (5.6) at a relative
43、 humidity of 95% 5%, or seal in plastic bags, and store at a temperature of 20 C2 C (moist curing) for a the period specified in Table 1. After the specified period unseal any plastic bags and separate the mortar specimens from the substrate and store at a temperature of 20 C2 C and a relative humid
44、ity of 50 % 5 % for the remainder of the 28 days total curing and storage period (see Table 1). Then cut circular specimens to a diameter matching the test cup dimensions. !Measure the thickness of the specimen at three places and calculate the mean value. “EN 1015-19:1998 6 BSI 25 November 2004 Tab
45、le 1 Storage and curing conditions for test specimens 7 Procedure Set the circular specimens, (prepared under the appropriate conditions described in Table 1), in test cups (5.1) and seal the edges with an appropriate sealant (5.3). For the upper hygroscopic range, control the water vapour pressure
46、within the cup using a saturated solution of potassium nitrate (KNO 3 ) (5.4). For the lower hygroscopic range, control the water vapour pressure within the cup using a saturated solution of lithium chloride (LiCl) (5.5). In each case leave a small air-gap of 10 mm 5 mm between the specimen and the
47、surface of the solution (see Figure 1). Place the test cups in the storage chamber (5.6) at 20 C 2 C and relative humidity of 50 % 5 %. Weigh the test cups at appropriate time intervals 1) . Draw a graph of the mass of the cup against time. If three points can be placed on one straight line the cond
48、itions are considered to be stable, i.e. the quantity of water vapour passing through the specimen per unit time is constant. 8 Calculation and expression of results From the graph for each hygroscopic range determine the water vapour flux, %G/ %t. Calculate the water vapour permeance ( 3) from the
49、following formula: in kg/m 2 s Pa. Calculate the mean water vapour permeance from the values for the five individual specimens expressed to two significant figures. !Calculate the water vapour permeability (W vp ) from the mean value for the water vapour permeance by multiplying this by the mean specimen thickness in m. W vp= %.t “ Type of mortar Storage time (days) Curing conditions: 20 C 2 C and 95 % 5 % RH 1) 20 C 2
