SIST EN 13279-2:2004

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Gipsbinder und Gips-Trockenmörtel - Teil 2: PrüfverfahrenPlâtres et enduits a base de plâtre pour le bâtiment - Partie 2: Méthodes d'essaiGypsum binders and gypsum plasters - Part 2: Test methods91.100.10Cement. Mavec. Apno. MaltaCement. Gypsum. Lime. MortarICS:Ta slovenski standard je istoveten z:EN 13279-2:2004SIST EN 13279-2:2004en,fr,de01-oktober-2004SIST EN 13279-2:2004SLOVENSKI
STANDARD



SIST EN 13279-2:2004



EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 13279-2July 2004ICS 91.100.10English versionGypsum binders and gypsum plasters - Part 2: Test methodsPlâtres et enduits à base de plâtre pour le bâtiment - Partie2: Méthodes d'essaiGipsbinder und Gips-Trockenmörtel - Teil 2: PrüfverfahrenThis European Standard was approved by CEN on 2 July 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application 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 translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.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, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2004 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 13279-2:2004: ESIST EN 13279-2:2004



EN 13279-2:2004 (E) 2 Contents Foreword.3 Introduction.4 1 Scope.5 2 Normative references.5 3 Test conditions and sampling.5 3.1 Test atmosphere (reference test).5 3.2 Sampling.5 3.3 Preparation of the sample.5 3.4 Water.5 3.5 Appliances and apparatus.6 4 Test methods for gypsum binders and gypsum plasters (including special purposes).6 4.1 Sieve analysis (Fineness).6 4.1.1 Apparatus.6 4.1.2 Determination
of particles
retained on 5000 µm sieves.6 4.1.3 Determination of particles retained on 200 µm and 100 µm sieves.6 4.2 Determination of sulphur trioxide content and calculation of equivalent calcium sulfate.7 4.2.1 Principle.7 4.2.2 Apparatus.7 4.2.3 Reagents.7 4.2.4 Procedure.7 4.2.5 Expression of results.8 4.3 Determination of the water/plaster ratio.8 4.3.1 Sprinkling method.8 4.3.2 Dispersal method.9 4.3.3 Flow table method.10 4.4 Determination of the setting time.11 4.4.1 Knife method.11 4.4.2 Vicat cone method.12 4.5 Determination of mechanical properties.13 4.5.1 Apparatus.13 4.5.2 Preparation of the test specimen.16 4.5.3 Determination of hardness.16 4.5.4 Determination of flexural strength.17 4.5.5 Determination of compressive strength.18 4.6 Determination of adhesion.18 4.6.1 Principle.18 4.6.2 Apparatus.18 4.6.3 Procedure.19 4.6.4 Expression of results.19 Annex A (informative)
Water retention.21
SIST EN 13279-2:2004



EN 13279-2:2004 (E) 3 Foreword This document (EN 13279-2:2004) has been prepared by Technical Committee CEN/TC 241 “Gypsum and gypsum based products”, the secretariat of which is held by AFNOR. This document shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by January 2005, and conflicting national standards shall be withdrawn at the latest by January 2005. 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, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. No existing document is superseded. This document on gypsum binders and gypsum plasters consists of two parts:  Part 1: Definitions and requirements.  Part 2: Test methods. This document for gypsum binders and gypsum plasters uses European standardised test methods as far as possible and where this was not applicable other appropriate proven test methods have been used. This document includes an informative Annex concerning water retention.
SIST EN 13279-2:2004



EN 13279-2:2004 (E) 4 Introduction Diagram 1 shows the family of gypsum binders and gypsum plasters Diagram 1 −−−− Family of gypsum binders and gypsum plasters Raw gypsum Gypsum binders (A) - for further powder products - for direct use on site - for further processing e.g.
- blocks
- plasterboards
- ceiling elements
- etc Gypsum plasters (B1 to B7) Gypsum plaster for special purposes
(C1 to C6) Other dry powder products e.g.- jointing - adhesives - compounds - etc covered in this document not covered in this document SIST EN 13279-2:2004



EN 13279-2:2004 (E) 5 1 Scope This document describes the reference test methods for all gypsum binders and gypsum plasters covered by prEN 13279-1.
2 Normative references 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 196-1:1994, Methods of testing cement - Part 1: Determination of strength. EN 196-7, Methods of testing cement - Part 7: Methods of taking and preparing samples of cement. EN 459-2:2001, Building lime - Part 2: Test methods. EN 932-1, Tests for general properties of aggregates - Part 1: Methods for sampling. prEN 13279-1, Gypsum binders and gypsum plasters - Part 1: Definitions and requirements. ISO 565, Test sieves - Metal wire cloth, perforated metal plate and electroformed sheet - Nominal sizes of
openings. 3 Test conditions and sampling 3.1 Test atmosphere (reference test) Temperature of the test room, the equipment and the materials (plaster, water): (23 ± 2) °C Relative humidity of the air: (50 ± 5) %
3.2 Sampling Sampling shall be carried out in accordance with EN 196-7. Sample granular material in accordance with the procedures given in EN 932-1 for aggregates taking into account the need to minimize moisture and carbon dioxide absorption. The spot sample size shall be (8 ± 3) kg. The test sample prior to testing shall be kept in hermetically sealed containers. 3.3 Preparation of the sample Before carrying out tests, the mass of the sample shall be homogenized. Before carrying out chemical analyses, a representative sample of (50 ± 5) g shall be taken and be ground to a particle size of ≤ 0,1 mm. 3.4 Water The water used for reference tests and chemical analyses shall be distilled or deionised. SIST EN 13279-2:2004



EN 13279-2:2004 (E) 6 3.5 Appliances and apparatus The apparatus used for gauging and the moulds used for preparing the test pieces, shall be free from leaks and shall be manufactured from a water resistant material which is non reactive to calcium sulphate (e. g. glass, brass, stainless steel, hardened steel, hard rubber and plastics). Soft plastic and rubber materials shall not be used. Since the characteristics of plasters are strongly influenced by the presence of particles of calcium sulphate dihydrate which can influence the setting time, all the equipment used in the tests shall be kept in a perfect state of cleanliness. 4 Test methods for gypsum binders and gypsum plasters (including special purposes) 4.1 Sieve analysis (Fineness) 4.1.1 Apparatus a) Control sieves conforming to ISO 565:  5000 µm , only for gypsum bricklaying plaster (C2);  200 µm and 100 µm for fibrous gypsum plaster elements (C1);  1500 µm for fibrous plaster works and thin coat plaster (C1, C6); b) wooden or plastic spatula ; c) balance accurate to ± 0,1 g; d) desiccator. 4.1.2 Determination
of particles
retained on 5000 µm sieves 4.1.2.1 Procedure From the hermetically sealed laboratory sample weigh 500 g ± 5 % and pass through a 5000 µm sieve, crushing any soft lumps with a spatula. Weigh the residue and examine any hard particles retained on the sieve. Repeat the procedure on a second sample. 4.1.2.2 Expression of
results Express the mass retained on the sieve as a percentage of the total sample. Take the mean of the two results and
record it in the test report. 4.1.3 Determination of particles retained on 200 µm and 100 µm sieves 4.1.3.1 Procedure Take approximately 200 g from the hermetically sealed sample and dry
it to constant mass1 at (40 ± 2) °C. Cool in a desiccator to room temperature. Weigh 50 g ± 5 % and transfer to the test sieve. Hold the sieve in one hand, slightly tilted, and shake it, allowing it to strike the other hand on each movement at a rate of approximately 125 times per minute, so that the plaster always spreads out evenly.
1 Constant mass is defined as two successive weighings 24h apart, differing by less than 0,1 %. SIST EN 13279-2:2004



EN 13279-2:2004 (E) 7 Every 25 movements turn the sieve through 90 degrees. After one minute weigh the residue and return to the sieve. Continue sieving until the mass of plaster passing the sieve in one minute does not exceed 0,4 g. After sieving for 3 min, brush any fine material adhering to the inner surface of the sieve frame onto the wire screen. Sieving is continued until the plaster passing the sieve in one minute does not exceed 0,2 g. The underside of the wire screen surface is then brushed, and the brushings rejected, before the residue retained on the sieve is weighed. For the 100 µm sieve the test is carried out in the same way and with the same limits as for the 200 µm sieve. Repeat the procedure on a second sample. 4.1.3.2 Expression of results Express the mass retained on the sieve as a percentage of the total sample. Take the mean of the two results for each of the sieve sizes and compare with the requirements. 4.2 Determination of sulphur trioxide content and calculation of equivalent calcium sulfate NOTE This test method applies to all types of plasters. 4.2.1 Principle The calcium sulfate is decomposed by digestion with hydrochloric acid solution. Insoluble constituents are removed by filtration. The sulfate in the filtrate is determined gravimetrically as barium sulfate. 4.2.2 Apparatus a) Sieve 0,1 mm mesh; b) 250 ml and 400 ml beakers; c) rapid filtration funnels; d) muffle furnace; e) vitreosil ignition crucible, porosity 4 or porous porcelain or silica crucible; f) filter paper capable of retaining particles greater than 2,5 µm; g) balance to an accuracy of 0,001 g; h) desiccator. 4.2.3 Reagents a) Hydrochloric acid solution : 2 mol/l HCl; b) barium chloride: (10 % solution). 4.2.4 Procedure The sample is ground until it passes through a sieve with a mesh of 0,1 mm. 0,5 g of the sample dried at 40 °C shall be boiled with 30 ml HCl 1:1 and 150 ml distilled H2O for 15 to 20 min in a 250 ml beaker. Then it shall be filtered through a quantitative filter (red band) into a 400 ml beaker and washed with hot deionized water. The solution shall be boiled, and while stirring it SO3 shall be precipitated with 25 ml 10 % barium chloride, brought to the boil, and then allowed to stand for at least 12 h. SIST EN 13279-2:2004



EN 13279-2:2004 (E) 8 The solution shall be filtered through a quantitative filter (red band) and washed using hot deionized water, until it is free of chloride. The filter residue shall be left to incinerate slowly in the crucible and ignited at 800 °C until constant weight is achieved, then be cooled in a desiccator and weighed. The test shall be repeated. 4.2.5 Expression of results 4.2.5.1 Calculation of SO3 The sulfate content expressed as SO3 is calculated in percent from the formula (1): pmBaSOSO100343,043××= (1) where BaSO4 is the mass of the barium sulfate BaSO4, in g; mp
is the mass of the sample, in g. 4.2.5.2 Calculation of equivalent calcium-sulfate The equivalent calcium-sulfate is calculated in percent from the formula (2):
CaSO
1,7
xSO43= (2) 4.3 Determination of the water/plaster ratio (Secretariat note : no corresponding requirements in part 1). 4.3.1 Sprinkling method This method is used for gypsum binders. 4.3.1.1 Principle Determination of the mass of the gypsum binder in grams which can be saturated when it is sprinkled into 100 g of water. 4.3.1.2 Apparatus a) Cylindrical glass container with 66 mm inside internal diameter and 66 mm height and with markings at a height of 16 mm and 32 mm above the inner surface of the base; b) chronometer; c) balance, accurate to ± 0,1 g. SIST EN 13279-2:2004



EN 13279-2:2004 (E) 9 4.3.1.3 Procedure Pour 100 g of water into the glass container, while taking care not to wet the upper part of the cylindrical wall. Determine the mass m0 within ± 0,5 g. The total time for the following procedure shall be (120 ± 5) s. First sprinkle the plaster evenly over the surface of the water in such a way, that after 30 s the gypsum paste has reached the first marking and has reached the second marking after 60 s. Continue the sprinkling until the gypsum paste has reached approximately 2 mm below the surface of the water after (90 ± 10) s. During the following 20 s to 40 s, sufficient binder is sprinkled on to the surface of the water and the rim of the glass container that the water surface di
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