ISO-6783-1982.pdf
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1、International Standard ) 6783 0 * Descriptors : concrete, aggregates, tests, determination, density (mass/volume), water absorption tests, hydrostatic tests. E E Price based on 2 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Techn
2、ical Standards 1/9972545001 Not for Resale, 04/25/2007 20:34:25 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 work of deve
3、loping Inter- national 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 liaison wi
4、th 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. International Standard IS0 6783 was developed by Technical Committee ISO/TC 71
5、, Concrefe, reinforced concrete and pre-stressed concrete, and was circulated to the member bodies in January 1980. It has been approved by the member bodies of the following countries : Australia Austria Brazil Canada Chile China Denmark Egypt, Arab Rep. of France Germany, F.R. Greece India Ireland
6、 Israel Italy Korea, Rep. of Netherlands New Zealand Norway Poland Romania South Africa, Rep. of Spain Sweden Switzerland Thailand USA USSR The member bodies of the following countries expressed disapproval of the document on technical grounds : Belgium Bulgaria Czechoslovakia United Kingdom Interna
7、tional Organization fnr Standardization, 1982 0 Printed in Switzerland Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 20:34:25 MDTNo reproduction or networking permitted without
8、 license from IHS -,-,- INTERNATIONAL STANDARD IS0 6763-1962 (El Coarse aggregates for concrete - Determination of particle density and water absorption - Hydrostatic balance method 1 Scope and field of application This International Standard specifies a method for the deter- mination of the particl
9、e density and water absorption of coarse aggregates, having a nominal size greater than 4 mm, for con- crete. 2 References IS0 565, Test sieves - Woven metal wire cloth and perforated plate - Nominal sizes of apertures. IS0 331011, Test sieves - Technical requirements and testing - Part 1 : Test sie
10、ves of metal wire cloth. IS0 331012, Test sieves - Technical requirements and testing - Part 2 : Test sieves of metal perforated plate. IS0 4847, Concrete - Sampling of normal weight ag-. grega tes. 1) IS0 6274, Concrete - Sieve analysis of aggregates. 3 Definitions 3.1 particle density21 (Q,) : The
11、 ratio of the mass of a sam- ple of aggregate particles to the volume it occupies (including both permeable and impermeable pores normal to the particles). It is expressed as mass per unit volume, i.e. kilograms per cubic metre (kg/m$ 3.2 water absorption : The increase in mass of a sample due to th
12、e penetration of water into the permeable pores of dry aggregate particles. It is expressed as a percentage of the dry mass. 4 Apparatus and materials 4.1 Balance, of adequate capacity (3 kg or more, depending on the sample size) and accurate to within 0,l % of the mass of the material to be weighed
13、. It shall permit the basket (4.2) con- taining the sample to be suspended and weighed in water. 4.2 Wire basket, of mesh approximately 1 to 3 mm or a per- forated container (perforations of diameter approximately 1 to 3 mm) of convenient size, preferably chromium plated and polished, with wire hang
14、ers (not thicker than 1 mm) to allow suspension from the balance. 4.3 Watertight tank, in which the basket (4.21 may be freely suspended. 4.4 Two dry soft absorbent cloths. 4.5 Closeable container, of similar capacity to the basket. 4.6 Test sieve (wire cloth or perforated plate), of aperture size 4
15、,0 or 4,75 or 5,0 mm31 complying with the requirements of IS0 3310/l or IS0 3310/2. 4.7 Water, free from any impurity (for example dissolved air) that would significantly affect its density. In case of doubt, distilled water, or tap water which has been freshly boiled and cooled to room temperature,
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