Bsi bs en 01402 5 2003 + a1 2007

untitled Li ce ns ed C op y B rig ht on U ni ve rs ity U se r, T he U ni ve rs ity o f B rig ht on , 2 8/ 05 /2 01 1 18 2 5, U nc on tr ol le d C op y, ( c) B S I BRITISH STANDARD BS EN 1402 5 2003 In[.]

Unshaped refractory products —

Part 5: Preparation and treatment of test pieces

The European Standard EN 1402-5:2003 has the status of aBritish Standard

ICS 81.080

This British Standard was

published under the authority

of the Standards Policy and

BS 1902-7.5:1987 which are withdrawn

The UK participation in its preparation was entrusted to Technical Committee RPI/1, Refractories

A list of organizations represented on this committee can be obtained on request to its secretary

This publication does not purport to include all the necessary provisions of a contract Users are responsible for its correct application

Compliance with a British Standard cannot confer immunity from legal obligations.

Amendments issued since publication

17176Corrigendum No 1 29 June 2007 Change to supersession details

EUROPÄISCHE NORM October 2003

ICS 81.080 Supersedes ENV 1402-5:1999

English versionUnshaped refractory products - Part 5: Preparation and

treatment of test pieces

Produits réfractaires non façonnés - Partie 5: Préparation

et traitement des éprouvettes

Ungeformte feuerfeste Erzeugnisse - Teil 5: Herstellung

und Behandlung von Probekörpern

This European Standard was approved by CEN on 20 June 2003.

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

EUROPEAN COMMITTEE FOR STANDARDIZATION

C O M I T É E U R O P É E N D E N O R M A L I S A T I O N

E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G

Management Centre: rue de Stassart, 36 B-1050 Brussels

© 2003 CEN All rights of exploitation in any form and by any means reserved Ref No EN 1402-5:2003 E

page

Foreword 4

Introduction 5

1 Scope 5

2 Normative references 5

3 Dimensions of test pieces 5

4 Apparatus 6

4.1 Separator 6

4.2 Mixer 6

4.2.1 Pan 6

4.2.2 Mixing blade 7

4.3 Vibrating table 8

4.4 Pneumatic rammer 8

4.5 Sand rammer 8

4.6 Power press 10

4.7 Trowel 10

4.8 Moulds 10

4.9 Balances 11

4.10 Steel lath 11

4.11 Humidity cabinet, 11

4.12 Drying oven, 11

4.13 Firing furnace 11

4.14 Stopwatch or stopclock .11

4.15 Thermometer .11

4.16 Silicon carbide box, 11

4.17 Water 11

5 Preparation of castable test pieces 12

5.1 Dense castables 12

5.1.1 Preparation of the material for shaping 12

5.1.2 Shaping of test pieces 12

5.2 Insulating castables 13

5.2.1 Preparation of the material for shaping 13

5.2.2 Shaping of test pieces 14

5.2.3 Calculation of dry yield density 15

6 Preparation of test pieces from ramming materials 15

6.1 Ramming mixes 15

6.1.1 Preparation of material for shaping 15

6.1.2 Shaping of test pieces 15

6.2 Plastics 16

6.2.1 Preparation of the material for shaping 16

6.2.2 Shaping of the test pieces 16

7 Treatment of test pieces 17

7.1 Castables 17

7.1.1 Curing 17

8.1 Castables 19

8.1.1 General 19

8.1.2 8.1.2 Firing under oxidizing atmosphere 19

8.1.3 Firing under reducing atmosphere 20

8.2 Ramming mixes and plastics 20

8.2.1 Alumino-silicate, special and carbon containing products 20

8.2.2 Carbon bonded basic ramming mixes 21

9 Test report 22

Bibliography 23

This document (EN 1402-5:2003) has been prepared by Technical Committee CEN/TC 187 "Refractory productsand materials", 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 April 2004, and conflicting national standards shall be withdrawn at the latest byApril 2004

This document supersedes ENV 1402-5:1999

EN 1402 “Unshaped refractory products” consists of eight parts:

 Part 1: Introduction and classification

 Part 2: Sampling for testing

 Part 3: Characterization as received

 Part 4: Determination of consistency of castables

 Part 5: Preparation and treatment of test pieces

 Part 6: Measurement of physical properties

 Part 7: Tests on pre-formed shapes

 Part 8: Determination of complementary properties

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, Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal,Slovakia, Spain, Sweden, Switzerland and the United Kingdom

The values of the properties obtained using these test-pieces are used to assess the homogeneity of unshapedmaterials They are reference values which do not necessarily correspond with those obtained in industrialapplications Other methods of test-piece preparation or treatment, which differ from those specified by thisstandard, can lead to different values

1 Scope

This part of this European Standard specifies methods for the preparation and treatment (curing, drying and firing)

of test pieces from unshaped refractory materials The dimensions of the test pieces are specified

The methods are applicable to dense and insulating castables and to ramming materials with the four types ofchemical composition defined in EN 1402-1

The dimensions of the test pieces are stated and the preparation of the mixture, compaction methods, storage andpost-treatment of the test pieces are described

2 Normative references

This European Standard incorporates by dated or undated reference, provisions from other publications Thesenormative references are cited at the appropriate places in the text, and the publications are listed hereafter Fordated references, subsequent amendments to or revisions of any of these publications apply to this EuropeanStandard only when incorporated in it by amendment or revision For undated references the latest edition of thepublication referred to applies (including amendments)

EN 993-3, Methods of test for dense shaped refractory products - Part 3: Test methods for carbon-containingrefractories

EN 1402-1, Unshaped refractory products - Part 1: Introduction and classification

EN 1402-2, Unshaped refractory products - Part 2: Sampling for testing

EN 1402-4, Unshaped refractory products - Part 4: Determination of consistency of castables

3 Dimensions of test pieces

Shape A: Length: 230 mm; width: 114 mm; thickness: 64 mm;

Shape B: Length: 230 mm; width: 64 mm; thickness: 54 mm;

Shape C: Length: 230 mm; width: 64 mm; thickness: 64 mm

The width of the test piece as tested shall correspond to the height during preparation The vibration of the testpiece during preparation shall be recorded, and for shape C the compaction surface shall be marked for reference.The selection of test pieces for each type of material shall be as given in Table 1, except that for basic densecastables and ramming materials, test pieces with a diameter of 50 mm and height of 50 mm ± 1 mm arepermissible Shape C shall be used as the referee shape

Table 1 — Type of shape for tests

Castables Dense

Castables

Max Grain Size <15 mm

Shape

B or C

Shape A

Direct Characterization b

X

Other tests X Max Grain

Size >15 mm

Direct Characterization b

B

2

3 1

of the pan are at least as large as the maximum grain size of the material For products with a maximum grain size

of 6 mm or less, the distance between the blade and the wall shall be 6 mm For products with larger grain sizes(up to 25 mm), the blade is used in a manner such that the distance to the wall of the pan is 25 mm

The mixing blade shall revolve at a speed between 40 r/min and 65 r/min around axis A (the symmetry axis of themixing pan), the blade rotating simultaneously in the opposite direction at a speed between 120 r/min and

145 r/min around axis B (symmetry axis of the blade)

4.3 Vibrating table

The vibrating table shall be flat and horizontal and shall perform only uniaxial vertical vibrations at a frequency of

50 Hz The table shall be capable of being set at a double amplitude of 0,75 mm for regular castables and of0,50 mm for deflocculated castables (see EN 1402-1) with an accuracy of ± 0,05 mm for the entire procedure.There shall be an automatic adjustment to the required double amplitude despite the weight of the mould

NOTE A more detailed description of this piece of apparatus is given in EN 1402-3

Figure 2 — Sand-rammer for shaping ramming mixes test pieces

Moulds shall be capable of being dismantled and shall be watertight They shall be made from a material that does

The internal measurements of the moulds are determined by the dimensions of the test pieces The surfaces

230 mm × 64 mm (shapes A and C) and 230 mm × 54 mm (shape B) are the horizontal surfaces during thecompaction process A variation of ± 0,5 mm is allowed for these dimensions If multi-compartment moulds areused, the size of the mould shall be adapted for the number of test pieces prepared and this shall be indicated inthe test report

In order to overfill the mould, an overfill ring is required for all unshaped materials This ring shall taper slightlyupwards For castables, it can at the same time serve as a clamp to the vibrating table The mould, the overfill ringand the clamp shall have sufficient rigidity to ensure that only the induced vibrations and the required frequencyand amplitude will occur

NOTE 2 It is recommended that all internal surfaces of the mould are slightly oiled

Balances shall be used which are capable of weighing up to 25 kg, with an accuracy of ± 10 g, up to 5 kg capable

of weighing to the nearest 1 g and up to 500 g with an accuracy of ± 0,1 g

4.10 Steel lath

Steel lath of typical size 500 mm × 30 mm × 5 mm shall be used for scraping off overfill after casting

4.11 Humidity cabinet, capable of maintaining a relative humidity of 90 % or greater, and of controlling thetemperature between 18 °C and 22 °C

4.12 Drying oven, fan-assisted and having openings to enable efficient ventilation

4.13 Firing furnace

Electric or gas fired furnace shall be used for firing test pieces with a temperature distribution over the hot zone of

± 10 °C The heating rate shall be programmable

Electric firing shall be used as the referee method

4.14 Stopwatch or stopclock.

4.15 Thermometer.

4.16 Silicon carbide box, with cover, with dimensions such that it is capable of containing 2 or 4 test pieces(shape B or C) with approximately 20 mm spaces between the test pieces, and the test pieces, sides, top andbottom of the box The box is filled with granules, 0,5 mm to 2 mm in size

NOTE The wall thickness should be as thin as possible and the thermal conductivity as high as possible to minimize thetemperature gradient

4.17 Water

Pure mains water with a maximum hardness of 30°

5 Preparation of castable test pieces

5.1 Dense castables

5.1.1 Preparation of the material for shaping

Reduce the amount of material to the required quantity with the riffle sampler or the shovel (see 4.1) in order toobtain the desired batch size for testing and thoroughly mix before use The batch size depends on the number oftest pieces to be prepared The number of test pieces to be prepared shall be chosen in accordance with

EN 1402-2

In cases where several components are supplied separately, mix each material first carefully by itself, then mix allcarefully together Before shaping the test pieces, maintain the material at a temperature between 18 °C and 22 °Cfor 24 h

Water or a special mixing liquid (necessary for the mix and supplied by the manufacturer) can be used for mixing.When water is used, pure mains water with a maximum degree of hardness of 30° is used, and its temperaturemaintained between 18 °C and 22 °C

Determine the amount of liquid either by a consistency test in accordance with EN 1402-4, or use the amountstipulated by the manufacturer Pour the amount of the dry material required into the mixer and mix for 30 s forhomogenization Add the liquid with an accuracy of 0,1 g per 100 g of dry substance After having made a crater inthe centre of the material, pour the liquid progressively into the crater and start the mixer Add the remaining liquid

in less than 1 min Note the relation, E, between the quantity of water and the quantity of dry material (in ml/g)

Mix the batch for 2 min in the case of regular castables and for 4 min in the case of defloculated castables Ifnecessary, switch the mixer off after 2 min mixing time, in order to scrape off the adhering material at the edges ofthe mixer

NOTE The wet mixing time should not be less than 2 min nor exceed 6 min, depending on the product type or the timerecommended by the manufacturer

Note the temperature of the batch before shaping

5.1.2 Shaping of test pieces

5.1.2.1 Compaction by vibration

The mix prepared in accordance with the instructions in 5.1.1 is compacted by vibration The total time for thepreparation of the mix and for making the test pieces shall not exceed 10 min

Fill the mould fitted with its overfill ring, vibrate the mix according to the time and the double amplitude as indicated

in Table 2 During the initial vibration, add material to the mould so that the level of material fills the overfill ring atcompletion of vibration

Table 2 — Time and double amplitude for compaction by vibration

Material Type of castable Total Time of

5 max 0,50 a

Basic dense castables b) 4 0,50 a

Carbon containing dense

castables

Regular 1 0,75

Defloculated +Chemically Bonded

5 max 0,50 a

a

Alternative double amplitudes for these materials can be used by agreement between parties and are reported

b

For basic dense castables, the sand rammer can also be used for preparing test pieces (see 6.1.2.2)

Check the double amplitude of the vibration table during the compaction process and correct if necessary Removethe overfill ring and level the surface of the material in the mould with the steel lath (see 4.10) Remove the mouldfrom the vibrating table

5.1.2.2 Compaction by self-flowing

The mix prepared according to the instructions as described in 5.1.1 is compacted by free de-airing The total timefor the preparation of the mix and for making the test-pieces shall not exceed 10 min

Fill the mould, without its overfill ring, with a moderate speed so as to obtain an accurate levelling between the top

of the mould and the product Let it lie without any movement until set, leaving the mould at the same place in thehumidity cabinet (see 4.11) or air-tight plastic bag in the curing room (see 7.1.1)

to be prepared The number of test pieces to be prepared shall be chosen in accordance with EN 1402-2

In cases where several components are supplied separately, mix each material first carefully by itself, then mix allcarefully together Before the shaping of test pieces, maintain the material for testing at a temperature between

18 °C and 22 °C for 24 h

Water or a special mixing liquid (necessary for the mix and supplied by the manufacturer) can be used for mixing.When water is used, pure mains water with a maximum degree of hardness of 30° is to be used, and itstemperature shall be maintained between 18 °C and 22 °C