1、PUBLISHED DOCUMENT PD CEN/TR 15123:2005 Design, preparation and application of internal polymer plastering systems ICS 83.140.99; 91.180 PD CEN/TR 15123:2005 This Published Document was published under the authority of the Standards Policy and Strategy Committee on 12 December 2005 BSI 12 December 2
2、005 ISBN 0 580 46697 3 National foreword This Published Document is the official English language version of CEN/TR 15123:2005. The UK participation in its preparation was entrusted by Technical Committee B/544, Plastering, rendering, dry lining, to Subcommittee B/544/4, Plastering, which has the re
3、sponsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep UK interests informed; monitor related international and European developments and promulgate them in the UK. A li
4、st 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 “International Sta
5、ndards 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 with a Published Docu
6、ment does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, the CEN/TR title page, pages 2 to 13 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amend
7、ments issued since publication Amd. No. Date CommentsTECHNICALREPORT RAPPORTTECHNIQUE TECHNISCHERBERICHT CEN/TR15123 June2005 ICS83.140.99;91.180 Englishversion Design,preparationandapplicationofinternalpolymer plasteringsystems Planung,ZubereitungundAusfhrungvon Kunstharzinnenputzsystemen ThisTechn
8、icalReportwasapprovedbyCENon13May2005.IthasbeendrawnupbytheTechnicalCommitteeCEN/TC125. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Pola
9、nd,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2005CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMe
10、mbers. Ref.No.CEN/TR15123:2005:E2 Contents Page Foreword3 1 Scope.4 2 Terms and definitions 4 3 Materials and accessories .4 4 Design - factors influencing the selection of polymer plastering systems 5 5 Characteristics of polymer plasters6 6 Types and standards of plaster finish 11 7 Application 11
11、 Bibliography 13 CEN/TR 15123:20053 Foreword This document (CEN/TR 15123:2005) has been prepared by Technical Committee CEN/TC 125 “Masonry“, the secretariat of which is held by BSI. This document has been initially prepared by the European section of International Union of Contractors of Plastering
12、, Dry Lining, Stucco and Related Activities (UIEP) at the request of the CEN Technical Sector Board (Resolution No.BTS1/56/1991). It has been revised by CEN/TC 125/JWG5 in conjunction with CEN/TC 241. The CEN technical report gives in different sections guidance for building details, design and mate
13、rials considerations and the application of polymer plasters. Relevant data are summarized in a series of tables. The recommendations are framed in logical sequence, namely materials and accessories; properties of backgrounds that influence the choice of suitable polymer plastering systems; guidance
14、 on preparation of surfaces to be plastered; choice of suitable polymer plasters; methods of application. It is essential that the design clauses are read in conjunction with the clauses on background and preparation. It is not the function of this document to assign responsibility for the design an
15、d application of any work or actions mentioned within to any specific party. Such responsibility is a matter for other documentation associated with the work, e.g. the contract. It has been assumed in the drafting of this document that the application of its provisions is entrusted to appropriately
16、qualified and experienced people, for whose guidance it has been prepared. This TR should be read in conjunction with EN 13914-2. The following similar Technical Reports are also available:- CEN/TR 15124:2005 Design, preparation and application of internal gypsum plastering systems CEN/TR 15125:2005
17、 Design, preparation and application of internal cement and/or lime plastering systems According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to announce this Technical Report: Austria, Belgium, Cyprus, Czech Republic, Denmark, Es
18、tonia, 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. CEN/TR 15123:20054 1 Scope This document concerns the design, preparation and
19、 application of plaster with polymer as the principal binder type, for internal plastering on all types of background used under normal conditions. It includes plastering onto both new and old backgrounds and the maintenance and repair of existing work. It concerns materials, backgrounds, preparatio
20、n of the surface to be plastered, choice of suitable polymer plasters, methods of application and inspection and testing of plastering. Because of the many and varied materials and practices in Europe it is not possible for certain aspects of the standard to enter into sufficient detail to be fully
21、usable to practitioners in each country. 2 Terms and definitions For the purposes of this document, the following terms and definitions apply. 2.1 polymer plaster plaster with polymer as the principle active binding component. Additives, fillers and aggregates may be added by the manufacturer. The p
22、laster can be delivered as a powder or ready-to-use 2.2 polymer plaster coat obtained by application of one layer of the product 2.3 polymer plastering system polymer plaster coat or sequence of coats to be applied to a background to achieve the required flatness and smoothness, including the possib
23、le use of a support and/or reinforcement and/or pretreatment 2.4 one coat polymer plaster polymer plaster applied in one coat which fulfils all the functions of an undercoat and a final coat 2.5 undercoat lower plaster coat(s) of a plastering system which needs a final coat 2.6 final coat last plast
24、er coat of a multi-coat plastering system 2.7 efflorescence formation of crystals on a surface during drying caused by the presence of soluble salts 3 Materials and accessories 3.1 General plasters 3.1.1 General Where applicable the polymer plaster should conform to prEN 14023. They should be classi
25、fied in accordance with EN 13501-1 for reaction to fire. CEN/TR 15123:20055 3.1.2 Polymer plasters (e.g. synthetic resin plaster, silicone plaster) These thin coat plasters harden mainly by physical drying which can sometimes limit the coat thickness. There are no general requirements regarding suct
26、ion and key of the background and the adhesion to all kinds of dry backgrounds including paints is usually good. 3.1.3 Silicate plasters These plasters harden chemically and by physical drying. In very rapid drying conditions, precautions need to be taken to retain sufficient moisture to allow an ad
27、equate hardening of the plaster. 3.2 Water The water should be of a quality such that it does not adversely affect the plaster. Water fit for drinking is suitable for mixes for plastering NOTE Attention is drawn to the requirements of EN 1008 in cases where water supplies may be of doubtful quality.
28、 3.3 Reinforcement and beads Reinforcement and beads of whatever type, should conform to EN 13658-1 Metal lath and beads Definitions requirements and test methods Part 1: internal plastering. 3.4 Fixings Fixings for beads such as nails, screws, staples and steel wire should be made of compatible mat
29、erial and should conform to EN 10223-3, EN 10230-1, EN 10244-1 or EN 10244-2. 4 Design - factors influencing the selection of polymer plastering systems 4.1 Functions and properties that may be required The function and properties achievable are determined by the choice of plaster type. A plastering
30、 system will need to fulfil some of the following functions or properties: to even out any small unevenness in the background and provide a flat surface (see Table 1); to provide a decorative finish or a background for such a finish; to be vapour permeable; to have enhanced strength; to have enhance
31、d resistance to abrasion. Special plasters can provide enhanced properties for the following aspects: to improve the acoustic properties of a building element (see 5.4); 4.2 Factors influencing the choice of polymer plasters The designer should consider all functional and aesthetic aspects of the bu
32、ilding. CEN/TR 15123:20056 The choice of polymer plaster(s) or plaster system is determined principally by: a) type of building (private houses, buildings); purpose of building (flat, school, hospital, office); uses (for example: wet room); b) the characteristics of the background; c) the ambient an
33、d operating conditions; d) the traditional usage in any particular area; e) the type of finish required. 4.3 Background Consideration should be given to the compatibility between polymer plasters and the background. To achieve this compatibility, the following items should be considered: a) The back
34、ground should provide adequate support, strength and rigidity for the adhesion of the plaster. b) Masonry should conform to the requirements of ENV 1996-2. c) Boards, slabs and polystyrene should be fixed securely and should only be plastered when they are dry and dimensionally stable. d) It is impo
35、rtant to avoid: 1) movement of the background, including structural, moisture and thermal movements; 2) defects in the background, e.g. weakness, contamination. 3) efflorescence Such compatibility is necessary to avoid bond failure between successive coats or between the first plaster coat and the b
36、ackground. If any of these inadequate characteristics of the background exist, then other means of providing support and/or additional adhesion should be used. If it is necessary to plaster over an existing substrate, ensure that it will have sufficient bond strength to support and provide adhesion
37、for the new plaster. Where a plaster coat is applied to cement or cement lime background, it is important that the entire substrate is mature, clean and dry, otherwise difficulty with decoration due to the migration of alkalis may be experienced and in extreme cases complete de-bonding of the plaste
38、r coat can occur. 5 Characteristics of polymer plasters 5.1 General Polymer plasters may be decorated with most proprietary finishes when dry. Polymer plaster can be used in most areas and on most substrates including painted surfaces with or without pre-treatment. Each coat should be allowed to har
39、den and dry before applying the subsequent coat. CEN/TR 15123:20057 Polymer plaster, when hardened and dry, is amongst the least troublesome of plaster surfaces in relation to decorative finish. 5.2 Fire properties 5.2.1 Reaction to fire See 3.1. 5.2.2 Fire resistance Resistance to fire is a propert
40、y of a system (background and plastering) and not of the product itself. When relevant, the fire resistance of a system including polymer plastering should be tested and classified in accordance with EN 13501-2. The manufacturer should declare performance on fire: integrity (E), resistance (R). 5.3
41、Thermal properties Normal plasters do not make a significant contribution to thermal insulation. However, they do provide an effective way of sealing porous surfaces and voids. 5.4 Acoustic properties Even if standard polymer plasters do not contribute specifically to sound absorption, a polymer pla
42、stering system contributes to sound absorption due to its flexibility (minor critic frequency) and continuity by filling voids. If enhanced sound absorption properties are required, then special acoustic plasters should be used. Sound-absorbent finishes may affect sound transmission indirectly to so
43、me extent by reducing the level of reverberant noise in either the source room or receiving room. 5.5 Resistance to cracking When the background has been erected in accordance with the relevant standards and the polymer plaster applied in accordance with this document and the recommendations of the
44、manufacturer, then the polymer plaster will perform satisfactorily. The maximum coat thickness recommended by the manufacturer should not be exceeded. 5.6 Water resistance In wet areas polymer plasters with enhanced water resistance should be used. 5.7 Durability The durability of polymer plaster ca
45、n be affected by the following: Lack of adhesion to the background and between coats e.g. too low or too high temperatures. Alkali migration from the background. Contamination from the background e.g. oil, salts. CEN/TR 15123:20058 Dust on the background. Incorrect usage. Persistent high humidity an
46、d dampness. Movement in the structure. 5.8 Surface requirements 5.8.1 Flatness The flatness of the plastered finish will depend upon the accuracy to which the background has been constructed and the thickness of the plaster specified. Backgrounds which are built within the tolerances specified in EN
47、V 1996-2 may still not be able to be plastered plumb or to line unless sufficient plaster thickness is specified. Thinner applications of plaster will only overcome minor irregularities or small deviations from line of the background. In general, no tolerance can be specified for very thin plaster c
48、oats since this will closely follow the contour of the background. Table 1 gives recommendations for classes of flatness of the plastered finish. NOTE 1 Care should be taken that the thicknesses applied should not exceed the manufacturers recommendations. NOTE 2 Under certain conditions where the pl
49、asterwork is subject to shallow angle lighting e.g. in long corridors with end lighting, although within this deviation limit, plasterwork can still reveal minor inherent surface irregularities. CEN/TR 15123:20059 Table 1 Classes of flatness Class Standard of finish required gap under straight edge Minimum standard of background flatness to a
