EN 1015-12-2016 en Methods of test for mortar for masonry - Part 12 Determination of adhesive strength of hardened rendering and plastering mortars on substrates《圬工辅助元件的试验方法-第12部分 .pdf

1、BS EN 1015-12:2016Methods of test for mortar formasonryPart 12: Determination of adhesive strengthof hardened rendering and plasteringmortars on substratesBSI Standards PublicationWB11885_BSI_StandardCovs_2013_AW.indd 1 15/05/2013 15:06BS EN 1015-12:2016 BRITISH STANDARDNational forewordThis British

2、 Standard is the UK implementation of EN 1015-12:2016. It supersedes BS EN 1015-12:2000 which is withdrawn.The UK participation in its preparation was entrusted to Technical Committee B/519, Masonry and associated testing.A list of organizations represented on this committee can be obtained on reque

3、st to its secretary.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. The British Standards Institution 2016.Published by BSI Standards Limited 2016ISBN 978 0 580 87438 3 ICS 91.080.30; 91.100.10 Compliance wit

4、h a British Standard cannot confer immunity from legal obligations.This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 June 2016.Amendments/corrigenda issued since publicationDate T e x t a f f e c t e dBS EN 1015-12:2016EUROPEAN STANDARD NORM

5、E EUROPENNE EUROPISCHE NORM EN 1015-12 June 2016 ICS 91.100.10 Supersedes EN 1015-12:2000English Version Methods of test for mortar for masonry - Part 12: Determination of adhesive strength of hardened rendering and plastering mortars on substrates Mthodes dessai des mortiers pour maonnerie - Partie

6、 12 : Dtermination de ladhrence des mortiers denduit durcis appliqus sur supports Prfverfahren fr Mrtel fr Mauerwerk - Teil 12: Bestimmung der Haftfestigkeit von erhrteten Putzmrteln This European Standard was approved by CEN on 9 April 2016. CEN members are bound to comply with the CEN/CENELEC Inte

7、rnal 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

8、 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 ve

9、rsions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway

10、, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels 2016 CEN All rights of exploit

11、ation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 1015-12:2016 EBS EN 1015-12:2016EN 1015-12:2016 (E) 2 Contents Page European foreword . 3 1 Scope 5 2 Normative references 5 3 Principle . 5 4 Symbols . 5 5 Apparatus . 5 6 Sampling and sample preparation 6 6

12、.1 General 6 6.2 Laboratory prepared mortars 6 6.3 Mortars, other than laboratory prepared mortars . 7 7 Preparation and storage of test specimens . 7 7.1 Substrate 7 7.2 Application 7 7.3 Test areas . 7 7.3.1 General 7 7.3.2 Fresh mortar . 7 7.3.3 Hardened mortars 8 7.4 Storage and curing condition

13、s 8 8 Procedure. 8 9 Expression of results Adhesive strength . 8 10 Test report 10 BS EN 1015-12:2016EN 1015-12:2016 (E) 3 European foreword This document (EN 1015-12:2016) has been prepared by Technical Committee CEN/TC 125 “Masonry”, the secretariat of which is held by BSI. This European Standard

14、shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by December 2016, and conflicting national standards shall be withdrawn at the latest by March 2018. This document supersedes EN 1015-12:2000. The following technical changes

15、 have been done in this new edition: There has been a relaxation in the choice of metal for the pull-head plates. The temperature range for storage and curing the specimens has been extended slightly. The substrates may be rendered stored and tested either in the vertical or horizontal attitude inst

16、ead of the vertical only. EN 1015, Methods of test for mortar for masonry, currently comprises the following parts: Part 1: Determination of particle size distribution (by sieve analysis); Part 2: Bulk sampling of mortars and preparation of test mortars; Part 3: Determination of consistence of fresh

17、 mortar (by flow table); Part 4: Determination of consistence of fresh mortar (by plunger penetration); Part 6: Determination of bulk density of fresh mortar; Part 7: Determination of air content of fresh mortar; Part 9: Determination of workable life and correction time of fresh mortar; Part 10: De

18、termination of dry bulk density of hardened mortar; Part 11: Determination of flexural and compressive strength of hardened mortar; Part 12: Determination of adhesive strength of hardened rendering and plastering mortars on substrates (the present document); Part 17: Determination of water-soluble c

19、hloride content of fresh mortars; Part 18: Determination of water absorption coefficient due to capillary action of hardened mortar; Part 19: Determination of water vapour permeability of hardened rendering and plastering mortars; Part 21: Determination of the compatibility of one-coat rendering mor

20、tars with substrates. BS EN 1015-12:2016EN 1015-12:2016 (E) 4 According to the CEN/CENELEC Internal Regulations, the national standards organisations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estoni

21、a, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 1015-12:2016EN 1015

22、-12:2016 (E) 5 1 Scope This European Standard specifies a method for the determination of the adhesive strength between rendering and plastering mortars and a substrate. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispens

23、able for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 772-11, Methods of test for masonry units - Part 11: Determination of water absorption of aggregate concrete, a

24、utoclaved aerated concrete, manufactured stone and natural stone masonry units due to capillary action and the initial rate of water absorption of clay masonry units EN 998 (all parts), Specification for mortar for masonry EN 1015-2, Methods of test for mortar for masonry - Part 2: Bulk sampling of

25、mortars and preparation of test mortars EN 1015-3, Methods of test for mortar for masonry - Part 3: Determination of consistence of fresh mortar (by flow table) EN 1015-11, Methods of test for mortar for masonry - Part 11: Determination of flexural and compressive strength of hardened mortar 3 Princ

26、iple The adhesive strength is determined as the maximum tensile stress applied by a direct load perpendicular to the surface of the rendering or plastering mortar on a substrate. The tensile load is applied by means of a defined pull-head plate glued to the test area of the mortar surface. The adhes

27、ive strength obtained is the quotient between the failure load and the test area. 4 Symbols fuis the adhesive strength, (N/mm2); Fuis the failure load, (N); A is the test area of cylindrical specimen, (mm2). 5 Apparatus 5.1 Truncated conical rings, (see Figure 1) made of stainless steel or brass, wi

28、th internal diameter of (50 0,1) mm and (25 0,5) mm in height. The minimum thickness of the mould wall shall be 5,0 mm at the top. The external diameter at the base shall be (51 0,1) mm. 5.2 Circular pull-head plates, made of metal, with diameter of (50 0,1) mm and minimum thickness 10 mm, and with

29、central fitting for connection to the direct pull tensile force apparatus. BS EN 1015-12:2016EN 1015-12:2016 (E) 6 Dimensions in millimetres Figure 1 Sharp-edged, truncated conical ring 5.3 Adhesive based on resin, e.g. epoxy resin or methylmethacrylate resin. 5.4 Core drilling machine, with core dr

30、ill of nominally 50 mm internal diameter, suitable to cut core samples from hardened mortars and substrates. 5.5 Testing machine for direct pull tensile force test and with suitable capacity and sensitivity for the test as specified in Clause 8. It shall be capable of applying the load to the pull-h

31、ead plate through a suitable fitting that excludes any bending forces. The machine shall comply with the requirements in Table 1. 5.6 Storage chamber, capable of maintaining a temperature of 20 C (+3/-2 C) and at a relative humidity of (65 5) %. Table 1 Requirements for testing machine Maximum permi

32、ssible repeatability of forces as percentage of nominal force Maximum permissible mean error of forces as percentage of nominal force Maximum permissible error of zero force as percentage of maximum force of range % % % 2,0 2,0 0,4 6 Sampling and sample preparation 6.1 General The fresh mortar for t

33、his test 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 obtained by reduction of the bulk test sample (see EN 1015-2) using a sample divider or by quartering or by preparation from water and the other

34、constituents in the laboratory. Two test samples shall be prepared. 6.2 Laboratory prepared mortars The length of mixing period shall be measured from the moment all the constituents are introduced into the mixer. BS EN 1015-12:2016EN 1015-12:2016 (E) 7 The mortar shall be brought to a defined flow

35、value as specified in EN 1015-2 determined in accordance with EN 1015-3 and reported. The test procedure shall not start until at least 10 min after completion of mixing and shall be concluded within the specified workable life of the mortar (preferably within 30 min after completion of mixing), unl

36、ess otherwise instructed by the manufacturer. 6.3 Mortars, other than laboratory prepared mortars 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 used for specimen preparation within their

37、specified workable life. Before testing, the batch shall be gently stirred by hand using a trowel or palette knife for (5 10) s to counteract any false setting, etc., but without any additional mixing of the batch. The flow value of the mortar in the bulk test sample shall be determined in accordanc

38、e with EN 1015-3 and reported. 7 Preparation and storage of test specimens 7.1 Substrate For rendering or plastering systems manufactured for a specific background, i.e. clay or calcium silicate masonry units, concrete masonry units, panels or cast in situ concrete, etc., these materials, in an air-

39、dried condition, should be used as test substrates. The water absorption due to capillary action of the units used in the substrate shall be recorded, if known, or tested in accordance with EN 772-11 where appropriate. Where no specific background is prescribed rectangular concrete panels shall be u

40、sed as substrate, with dimensions not less than 550 mm x 150 mm and 50 mm in thickness. The concrete shall be mixed with a water/cement ratio of 0,55 and using normal graded aggregates with maximum particle size of one third of the concrete panel thickness. The upper surface of the moulded substrate

41、 shall be levelled and wood-floated to achieve a suitable surface. Within a period of 6h to 24h lightly brush the surface. The concrete panels shall have an age of not less than 28 d when applying the plastering or rendering system, the panels being cured under standardized conditions as described i

42、n EN 1015-11. NOTE Concrete panels as a substrate will normally give conservative adhesive strength values. 7.2 Application The fresh mortar mix shall be applied to the prescribed substrate according to the manufacturers recommendations and the intended use. The substrate may be either horizontal or

43、 vertical during application. Unless otherwise specified the total thickness of the mortar layer shall be (10 1) mm. 7.3 Test areas 7.3.1 General Circular test areas of approximately 50 mm in diameter shall be cut through the mortar layer, either in the fresh mortar according to 7.3.2 or in the hard

44、ened mortar according to 7.3.3. The diameter of the circular test area shall be recorded for each specimen. Five test areas shall be provided. 7.3.2 Fresh mortar After application and the initial setting of the mortar layer, the truncated conical rings (5.1), cleaned and lubricated with a thin layer

45、 of mineral oil, shall be pressed with their sharp edge, slightly rotating, through the fresh mortar layer until full contact with the substrate is reached. The minimum distance BS EN 1015-12:2016EN 1015-12:2016 (E) 8 between the rings and the free edges of the rendered substrate, and the free dista

46、nce between the individual rings, shall be 50 mm. The rings shall be carefully removed, still slightly rotating, when the substrate is reached. If it is obvious that the adhesion of any of the test areas has been disturbed during this preparation, another test area shall be prepared. The specimen sh

47、all then be stored as given in 7.4. 7.3.3 Hardened mortars After curing of the rendering or plastering mortar, test specimens shall be cut using a core drilling machine (5.4). The core shall be cut to a depth of approximately 2 mm into the substrate. Damaged specimens shall be rejected. The minimum

48、distance between the rings and the free edges of the rendered substrate and the free distance between the individual rings shall be 50 mm. 7.4 Storage and curing conditions When the mortar is sufficiently hard, the rendered specimens shall be enclosed within a sealed, air-tight polyethylene bag and

49、at a temperature of 20 C (+3/-2 C) for 7 d. The specimens shall subsequently be removed and stored in air (5.6) at a constant temperature of 20 C (+3/-2 C) and at a relative humidity of (65 5) % for a further 21 d. 8 Procedure Glue the pull-heads with the adhesive centrally on the test areas, preventing any excess adhesive from bridging the cut around the test areas. Test the specimens at an age of 28 d immediately after being removed from the storing atmosphere. Using the testing machine (5.5), apply the