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1、INTERNATIONAL STANDARD 1587 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION .MEXflYHAPOjlHAX OPI-AHM3AUWfl II0 CTAHAPTH3AHbi.ORGANlSATlON INTERNATIONALE DE NORMALISATION Gypsum rock for the manufacture of binders - Specifications Pierre B pL?tre pour la fabrication des liants - Spkcifications First e
2、dition - 1975-1 l-01 iii 6 UDC 666.913.004.1 : 691.55 Ref. No. IS0 1587-1975 (E) 7 k Descriptors : gypsum, specifications, materials specifications, classifying, tests. r 8 Price based on 3 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee
3、=NASA Technical Standards 1/9972545001 Not for Resale, 04/28/2007 07:59:55 MDTNo reproduction or networking permitted without license from IHS -,-,- FOREWORD IS0 (the International Organization for Standardization) is a worldwide federation of national standards institutes (IS0 Member Bodies). The w
4、ork of developing international Standards is carried out through IS0 Technical Committees. Every Member Body interested in a subject for which a Technical Committee has been set up has the right to be represented on that Committee. International organizations, governmental and non-governmental, in l
5、iaison with ISO, also take part in the work. Draft International Standards adopted by the Technical Committees are circulated to the Member Bodies for approval before their acceptance as International Standards by the IS0 Council. Prior to 1972, the results of the work of the Technical Committees we
6、re published as IS0 Recommendations; these documents are now in the process of being transformed into International Standards. As part of this process, Technical Committee ISO/TC 152 has reviewed IS0 Recommendation R 1587 and found it technically suitable for transformation. International Standard I
7、S0 1587 therefore replaces IS0 Recommendation R 1587-1972 to which it is technically identical. IS0 Recommendation R 1587 was approved by the Member Bodies of the following countries : Australia Iran Austria Ireland Brazil Israel Czechoslovakia Italy Egypt, Arab Rep. of Netherlands France Norway Gre
8、ece Peru Hungary Poland India Portugal Romania South Africa, Rep. of Spain Sweden Thailand Turkey United Kingdom The Member Body of the following country expressed disapproval of the Recommendation on technical grounds : Germany The Member Bodies of the following countries disapproved the transforma
9、tion of ISO/R 1587 into an International Standard : France Germany 0 International Organisation for Standardization, 1975 6 Printed witzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale
10、, 04/28/2007 07:59:55 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD IS0 1587-1975 (E) Gypsum rock for the manufacture of binders - Specifications 1 SCOPE AND FIELD OF APPLICATION This International Standard gives the specifications for gypsum rock u
11、sed as raw material for the manufacture of calcium sulphate binders, or as an admixture in the manufacture of other kinds of binders. 2 DEFINITION gypsum rock : A sedimentary rock formation of crystalline structure with calcium sulphate dihydrate (CaS04.2H20) as the main component. 3 CLASSIFICATION
12、3.1 According to the calcium sulphate content Four classes of gypsum rock are distinguished, according to the calcium sulphate dihydrate content, Tg : Class I Tg90% Class II 80%90 Tc 18,83 II 80 Q Tg 90 16,74 Tc 18,83 ill 70 =G Tg 80 14,65 Tc 16.74 IV 55 Tg 70 II,51 Tc 14.65 NOTE - The content of di
13、fferent impurities may be limited, by agreement between the interested parties. 5 ACCEPTANCE AND DELIVERY 5.1 Acceptance The order shall specify whether the consignment is to be delivered with or without acceptance tests. If acceptance tests are specified, they shall be carried out at the place of s
14、upply. 5.2 Delivery Gypsym rock is usually delivered in bulk, i.e. without packing. If requested by the user, it may be packed in sacks, barrels, casks, containers, etc. 5.3 Transport documents Deliveries of gypsum rock shall be accompanied by transport documents currently used in the various countr
15、ies. If the order is made with acceptance tests, these documents shall also include the report of these tests. 1 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/28/2007 07:59:55 MDTNo re
16、production or networking permitted without license from IHS -,-,- IS0 1587-1975 (E) 6 SAMPLING 6.4 Reduced sample 6.1 Mass of a batch The consignment shall be divided into batches, each having a maximum mass of 100 t. Each delivery or fraction of a batch having a mass of less than 100 t is considere
17、d as a single batch. 6.4.1 Procedure The gross sample made up of increments taken as specified in 6.3 shall be mixed carefully, reduced by quartering, which is to be performed once only, and finally divided into two equal parts, one of which will be used for the tests and the other hermetically pack
18、ed and preserved for at least 3 months to be used for independent tests, if these are required. 6.2 Mass of a gross sample From each batch, increments shall be taken to make up a gross sample, the mass of which is determined as a function of the maximum particle size of the gypsum rock, as shown in
19、table 2. TABLE 2 I Maximum size of I Minimum mass of the particles gross sample I I mm 50 50 150 100 300 300 6.3 Increments 6.3.1 Number and size of increments The number and size of increments depend on the way the delivery is carried out. 6.3.1.1 DELIVERY IN BULK The gross sample is obtained by ta
20、king 10 increments, of about equal mass, from each batch. 6.3.1.2 DELIVERY IN CONTAINERS The gross sample is obtained by taking 20 increments, of about equal mass, from each batch. 6.3.2 Procedure 6.3.2.1 DELIVERY IN BULK Sampling shall take place during the loading of the transport vehicles (lorrie
21、s, railway trucks, barges or ships), before leaving the producers works. The time of sampling shall be fixed in advance by agreement between the interested parties, according to the nature and capacity of the vehicles. When the consignment is already loaded, it shall be divided into 10 approximately
22、 equal parts and the respective increments in the same lot shall be taken at different depths. 6.3.2.2 DELIVERY IN CONTAINERS 7.2.1 Test sample Increments shall be taken at different depths from 20 Use the test sample which has served for the determination packed units chosen at random. of foreign b
23、ody content, after having removed the latter. 6.4.2 Reduced sample for the determination of foreign bodies and of particle size group The mass of the reduced sample used for these deter- minations shall be equal to that shown in table 3. 6.4.3 Reduced sample for determination of moisture content and
24、 of water of crystallization The reduced sample intended for these determinations shall have a mass of about 5 kg for all classes of particle sizes. For particle sizes up to 150 mm, take the reduced sample by the method of quartering. For particle sizes up to 300 mm, crush lumps exceeding 150 mm wit
25、h a hammer, mix the whole sample and reduce twice by quartering. 7 TEST METI-IODS 7.1 Determination of the foreign body content 7.1 .I Test sample From the reduced sample (see 6.4) weigh a test sample, the mass of which shall be as given in table 3. TABLE 3 I Maximum size of I Minimum mess of the pa
26、rticles test sample I mm I kg 7.1.2 Procedure Spread the test sample carefully on a clean, hard slab. Remove and weigh foreign bodies. Express the content of foreign bodies as a percentage of the total mass of the test sample. 7.2 Determination of the particle size group 2 Copyright International Or
27、ganization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/28/2007 07:59:55 MDTNo reproduction or networking permitted without license from IHS -,-,- IS0 1587-1975(E) 7.2.2 Procedure The determination of the particle size g
28、roup shall be carried out by means of a test sieve for particles smaller than or equal to 50 mm, and with a gauge having circular holes for particles smaller than or equal to 150 mm. Weigh the residue for all particle size groups and the sieve material for groups 2 and 3 and express the value as a p
29、ercentage of the total mass of the test sample. 7.3 Determination of moisture content 7.3.1 Crushing of the reduced sample Having prepared the reduced sample according to 4.2, and after the elimination of foreign bodies, crush it into lumps about 10 mm in size. 7.3.2 Test sample From the prepared sa
30、mple (see 7.3.1), weigh a test sample of about 100 g. Let m. be the mass obtained. 7.3.3 Procedure Dry the test sample in an oven at a temperature of 40 f 4-C to constant mass, ml. 7.3.4 Expression of results The moisture content of the sample, H, expressed as a percentage of the initial mass of the
31、 test sample, is given by the formula : H= m0 -ml xl00 m0 7.4 Determination of water of crystallization 7.4.1 Preparation of the sample Grind the sample which served for the determination of moisture content in a porcelain mortar so that it is capable of passing through a sieve with 0,2 mm square me
32、shes. Grinding and sieving of the sample shall be carried out without interruption. Preserve the ground sample in a glass vessel provided with a tight stopper. 7.4.2 Principle Dehydratation, at a temperature of 230 C, to constant mass, of the previously dried test sample. 7.4.3 Apparatus 7.4.3.1 Cru
33、cibles made of material resistant to thermal shock. 7.4.3.2 Container provided with a tight cover and capable of containing a crucible (7.4.3.1). 7.4.3.3 Furnace capable of being controlled at a temperature of 230 + 5 *C. 7.4.4 Procedure Dry and weigh the container together with its cover and a cruc
34、ible. Quickly enclose in the container the crucible containing about 2 g of the ground sample, prepared according to 7.4.1. Weigh the whole. Let m2 be the precise mass of the test sample. Place the crucible in the furnace; remove it after 30 min; allow it to cool in the hermetically sealed container
35、. Weigh. Let m3 be the final mass of the test sample. 7.4.6 Expression of results The water of crystallization of the sample, expressed as a percentage of the initial mass of the test sample, is given by the formula : Tc=- xl00 m2 Carry out duplicate determinations. Take as the result the arithmetic
36、al average of the results obtained, provided that the difference between them is not greater than 0.15. 7.4.6 Calculation of calcium sulpha te dih ydra te con tent The content of calcium sulphate dihydrate (CaS04.2H,0) is obtained, as a percentage by mass, by multiplying the water of crystallization
37、 by the coefficient 4,778 5 : Tg = 4,778 5 x Tc 7.5 Determination of other constituents The chemical analysis of gypsum rock will be the subject of a separate International Standard. 6 BATCHES WHICH DO NOT MEET SPECIFICATIONS When a batch of gypsum rock does not meet the specifications of this Inter
38、national Standard, one of the following procedures is to be observed : a) the batch is transferred to another class; b) the batch is submitted to additional processing (for example, a new grinding); c) the batch is rejected. The rejection of a batch shall be notified in writing by the purchaser with
39、in 14 days following the date of delivery. 9 INDEPENDENT TESTS When the consignment of gypsum rock is rejected by the purchaser, the supplier has the right to require independent tests to be carried out. A request of this kind shall be transmitted within 20 days following the receipt of the notifica
40、tion of rejection. The institution chosen to arbitrate and to seek a settlement shall be agreed upon between the interested parties. The result of these tests will be considered final and binding. 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/28/2007 07:59:55 MDTNo reproduction or networking permitted without license from IHS -,-,-